diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/arm/boot/dts/armada-375.dtsi linux-libre-3.18.31-gnu/arch/arm/boot/dts/armada-375.dtsi
--- linux-libre-3.18.30-gnu/arch/arm/boot/dts/armada-375.dtsi	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/arm/boot/dts/armada-375.dtsi	2016-04-19 07:57:18.000000000 -0400
@@ -450,7 +450,7 @@
 			};
 
 			sata@a0000 {
-				compatible = "marvell,orion-sata";
+				compatible = "marvell,armada-370-sata";
 				reg = <0xa0000 0x5000>;
 				interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
 				clocks = <&gateclk 14>, <&gateclk 20>;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/arm/boot/dts/sun5i-a10s.dtsi linux-libre-3.18.31-gnu/arch/arm/boot/dts/sun5i-a10s.dtsi
--- linux-libre-3.18.30-gnu/arch/arm/boot/dts/sun5i-a10s.dtsi	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/arm/boot/dts/sun5i-a10s.dtsi	2016-04-19 07:57:18.000000000 -0400
@@ -526,7 +526,7 @@
 		};
 
 		rtp: rtp@01c25000 {
-			compatible = "allwinner,sun4i-a10-ts";
+			compatible = "allwinner,sun5i-a13-ts";
 			reg = <0x01c25000 0x100>;
 			interrupts = <29>;
 		};
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/arm/boot/dts/sun5i-a13.dtsi linux-libre-3.18.31-gnu/arch/arm/boot/dts/sun5i-a13.dtsi
--- linux-libre-3.18.30-gnu/arch/arm/boot/dts/sun5i-a13.dtsi	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/arm/boot/dts/sun5i-a13.dtsi	2016-04-19 07:57:18.000000000 -0400
@@ -474,7 +474,7 @@
 		};
 
 		rtp: rtp@01c25000 {
-			compatible = "allwinner,sun4i-a10-ts";
+			compatible = "allwinner,sun5i-a13-ts";
 			reg = <0x01c25000 0x100>;
 			interrupts = <29>;
 		};
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/arm/boot/dts/sun7i-a20.dtsi linux-libre-3.18.31-gnu/arch/arm/boot/dts/sun7i-a20.dtsi
--- linux-libre-3.18.30-gnu/arch/arm/boot/dts/sun7i-a20.dtsi	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/arm/boot/dts/sun7i-a20.dtsi	2016-04-19 07:57:18.000000000 -0400
@@ -896,7 +896,7 @@
 		};
 
 		rtp: rtp@01c25000 {
-			compatible = "allwinner,sun4i-a10-ts";
+			compatible = "allwinner,sun5i-a13-ts";
 			reg = <0x01c25000 0x100>;
 			interrupts = <0 29 4>;
 		};
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/arm/include/asm/psci.h linux-libre-3.18.31-gnu/arch/arm/include/asm/psci.h
--- linux-libre-3.18.30-gnu/arch/arm/include/asm/psci.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/arm/include/asm/psci.h	2016-04-19 07:57:18.000000000 -0400
@@ -37,7 +37,7 @@ struct psci_operations {
 extern struct psci_operations psci_ops;
 extern struct smp_operations psci_smp_ops;
 
-#ifdef CONFIG_ARM_PSCI
+#if defined(CONFIG_SMP) && defined(CONFIG_ARM_PSCI)
 int psci_init(void);
 bool psci_smp_available(void);
 #else
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/arm64/include/asm/pgtable.h linux-libre-3.18.31-gnu/arch/arm64/include/asm/pgtable.h
--- linux-libre-3.18.30-gnu/arch/arm64/include/asm/pgtable.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/arm64/include/asm/pgtable.h	2016-04-19 07:57:18.000000000 -0400
@@ -34,7 +34,7 @@
 /*
  * VMALLOC and SPARSEMEM_VMEMMAP ranges.
  *
- * VMEMAP_SIZE: allows the whole VA space to be covered by a struct page array
+ * VMEMAP_SIZE: allows the whole linear region to be covered by a struct page array
  *	(rounded up to PUD_SIZE).
  * VMALLOC_START: beginning of the kernel VA space
  * VMALLOC_END: extends to the available space below vmmemmap, PCI I/O space,
@@ -44,7 +44,9 @@
 #define VMALLOC_START		(UL(0xffffffffffffffff) << VA_BITS)
 #define VMALLOC_END		(PAGE_OFFSET - PUD_SIZE - VMEMMAP_SIZE - SZ_64K)
 
-#define vmemmap			((struct page *)(VMALLOC_END + SZ_64K))
+#define VMEMMAP_START		(VMALLOC_END + SZ_64K)
+#define vmemmap			((struct page *)VMEMMAP_START - \
+				 SECTION_ALIGN_DOWN(memstart_addr >> PAGE_SHIFT))
 
 #define FIRST_USER_ADDRESS	0
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/arm64/Makefile linux-libre-3.18.31-gnu/arch/arm64/Makefile
--- linux-libre-3.18.30-gnu/arch/arm64/Makefile	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/arm64/Makefile	2016-04-19 07:57:18.000000000 -0400
@@ -20,6 +20,8 @@ LIBGCC 		:= $(shell $(CC) $(KBUILD_CFLAG
 KBUILD_DEFCONFIG := defconfig
 
 KBUILD_CFLAGS	+= -mgeneral-regs-only
+KBUILD_CFLAGS	+= $(call cc-option, -mpc-relative-literal-loads)
+
 ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
 KBUILD_CPPFLAGS	+= -mbig-endian
 AS		+= -EB
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/arm64/mm/init.c linux-libre-3.18.31-gnu/arch/arm64/mm/init.c
--- linux-libre-3.18.30-gnu/arch/arm64/mm/init.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/arm64/mm/init.c	2016-04-19 07:57:18.000000000 -0400
@@ -286,8 +286,8 @@ void __init mem_init(void)
 		  "      .data : 0x%p" " - 0x%p" "   (%6ld KB)\n",
 		  MLG(VMALLOC_START, VMALLOC_END),
 #ifdef CONFIG_SPARSEMEM_VMEMMAP
-		  MLG((unsigned long)vmemmap,
-		      (unsigned long)vmemmap + VMEMMAP_SIZE),
+		  MLG(VMEMMAP_START,
+		      VMEMMAP_START + VMEMMAP_SIZE),
 		  MLM((unsigned long)virt_to_page(PAGE_OFFSET),
 		      (unsigned long)virt_to_page(high_memory)),
 #endif
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/powerpc/kernel/module_64.c linux-libre-3.18.31-gnu/arch/powerpc/kernel/module_64.c
--- linux-libre-3.18.30-gnu/arch/powerpc/kernel/module_64.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/powerpc/kernel/module_64.c	2016-04-19 07:57:18.000000000 -0400
@@ -335,7 +335,7 @@ static void dedotify(Elf64_Sym *syms, un
 		if (syms[i].st_shndx == SHN_UNDEF) {
 			char *name = strtab + syms[i].st_name;
 			if (name[0] == '.')
-				memmove(name, name+1, strlen(name));
+				syms[i].st_name++;
 		}
 	}
 }
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/s390/include/asm/pci.h linux-libre-3.18.31-gnu/arch/s390/include/asm/pci.h
--- linux-libre-3.18.30-gnu/arch/s390/include/asm/pci.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/s390/include/asm/pci.h	2016-04-19 07:57:18.000000000 -0400
@@ -44,11 +44,7 @@ struct zpci_fmb {
 	u64 rpcit_ops;
 	u64 dma_rbytes;
 	u64 dma_wbytes;
-	/* software counters */
-	atomic64_t allocated_pages;
-	atomic64_t mapped_pages;
-	atomic64_t unmapped_pages;
-} __packed __aligned(16);
+} __packed __aligned(64);
 
 #define ZPCI_MSI_VEC_BITS	11
 #define ZPCI_MSI_VEC_MAX	(1 << ZPCI_MSI_VEC_BITS)
@@ -114,6 +110,10 @@ struct zpci_dev {
 	/* Function measurement block */
 	struct zpci_fmb *fmb;
 	u16		fmb_update;	/* update interval */
+	/* software counters */
+	atomic64_t allocated_pages;
+	atomic64_t mapped_pages;
+	atomic64_t unmapped_pages;
 
 	enum pci_bus_speed max_bus_speed;
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/s390/pci/pci.c linux-libre-3.18.31-gnu/arch/s390/pci/pci.c
--- linux-libre-3.18.30-gnu/arch/s390/pci/pci.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/s390/pci/pci.c	2016-04-19 07:57:18.000000000 -0400
@@ -190,6 +190,11 @@ int zpci_fmb_enable_device(struct zpci_d
 		return -ENOMEM;
 	WARN_ON((u64) zdev->fmb & 0xf);
 
+	/* reset software counters */
+	atomic64_set(&zdev->allocated_pages, 0);
+	atomic64_set(&zdev->mapped_pages, 0);
+	atomic64_set(&zdev->unmapped_pages, 0);
+
 	args.fmb_addr = virt_to_phys(zdev->fmb);
 	return mod_pci(zdev, ZPCI_MOD_FC_SET_MEASURE, 0, &args);
 }
@@ -840,8 +845,11 @@ static inline int barsize(u8 size)
 
 static int zpci_mem_init(void)
 {
+	BUILD_BUG_ON(!is_power_of_2(__alignof__(struct zpci_fmb)) ||
+		     __alignof__(struct zpci_fmb) < sizeof(struct zpci_fmb));
+
 	zdev_fmb_cache = kmem_cache_create("PCI_FMB_cache", sizeof(struct zpci_fmb),
-				16, 0, NULL);
+					   __alignof__(struct zpci_fmb), 0, NULL);
 	if (!zdev_fmb_cache)
 		goto error_zdev;
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/s390/pci/pci_debug.c linux-libre-3.18.31-gnu/arch/s390/pci/pci_debug.c
--- linux-libre-3.18.30-gnu/arch/s390/pci/pci_debug.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/s390/pci/pci_debug.c	2016-04-19 07:57:18.000000000 -0400
@@ -31,12 +31,25 @@ static char *pci_perf_names[] = {
 	"Refresh operations",
 	"DMA read bytes",
 	"DMA write bytes",
-	/* software counters */
+};
+
+static char *pci_sw_names[] = {
 	"Allocated pages",
 	"Mapped pages",
 	"Unmapped pages",
 };
 
+static void pci_sw_counter_show(struct seq_file *m)
+{
+	struct zpci_dev *zdev = m->private;
+	atomic64_t *counter = &zdev->allocated_pages;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(pci_sw_names); i++, counter++)
+		seq_printf(m, "%26s:\t%llu\n", pci_sw_names[i],
+			   atomic64_read(counter));
+}
+
 static int pci_perf_show(struct seq_file *m, void *v)
 {
 	struct zpci_dev *zdev = m->private;
@@ -63,12 +76,8 @@ static int pci_perf_show(struct seq_file
 		for (i = 4; i < 6; i++)
 			seq_printf(m, "%26s:\t%llu\n",
 				   pci_perf_names[i], *(stat + i));
-	/* software counters */
-	for (i = 6; i < ARRAY_SIZE(pci_perf_names); i++)
-		seq_printf(m, "%26s:\t%llu\n",
-			   pci_perf_names[i],
-			   atomic64_read((atomic64_t *) (stat + i)));
 
+	pci_sw_counter_show(m);
 	return 0;
 }
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/s390/pci/pci_dma.c linux-libre-3.18.31-gnu/arch/s390/pci/pci_dma.c
--- linux-libre-3.18.30-gnu/arch/s390/pci/pci_dma.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/s390/pci/pci_dma.c	2016-04-19 07:57:18.000000000 -0400
@@ -300,7 +300,7 @@ static dma_addr_t s390_dma_map_pages(str
 		flags |= ZPCI_TABLE_PROTECTED;
 
 	if (!dma_update_trans(zdev, pa, dma_addr, size, flags)) {
-		atomic64_add(nr_pages, &zdev->fmb->mapped_pages);
+		atomic64_add(nr_pages, &zdev->mapped_pages);
 		return dma_addr + (offset & ~PAGE_MASK);
 	}
 
@@ -328,7 +328,7 @@ static void s390_dma_unmap_pages(struct
 		zpci_err_hex(&dma_addr, sizeof(dma_addr));
 	}
 
-	atomic64_add(npages, &zdev->fmb->unmapped_pages);
+	atomic64_add(npages, &zdev->unmapped_pages);
 	iommu_page_index = (dma_addr - zdev->start_dma) >> PAGE_SHIFT;
 	dma_free_iommu(zdev, iommu_page_index, npages);
 }
@@ -357,7 +357,7 @@ static void *s390_dma_alloc(struct devic
 		return NULL;
 	}
 
-	atomic64_add(size / PAGE_SIZE, &zdev->fmb->allocated_pages);
+	atomic64_add(size / PAGE_SIZE, &zdev->allocated_pages);
 	if (dma_handle)
 		*dma_handle = map;
 	return (void *) pa;
@@ -370,7 +370,7 @@ static void s390_dma_free(struct device
 	struct zpci_dev *zdev = get_zdev(to_pci_dev(dev));
 
 	size = PAGE_ALIGN(size);
-	atomic64_sub(size / PAGE_SIZE, &zdev->fmb->allocated_pages);
+	atomic64_sub(size / PAGE_SIZE, &zdev->allocated_pages);
 	s390_dma_unmap_pages(dev, dma_handle, size, DMA_BIDIRECTIONAL, NULL);
 	free_pages((unsigned long) pa, get_order(size));
 }
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/um/drivers/mconsole_kern.c linux-libre-3.18.31-gnu/arch/um/drivers/mconsole_kern.c
--- linux-libre-3.18.30-gnu/arch/um/drivers/mconsole_kern.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/um/drivers/mconsole_kern.c	2016-04-19 07:57:18.000000000 -0400
@@ -133,7 +133,7 @@ void mconsole_proc(struct mc_request *re
 	ptr += strlen("proc");
 	ptr = skip_spaces(ptr);
 
-	file = file_open_root(mnt->mnt_root, mnt, ptr, O_RDONLY);
+	file = file_open_root(mnt->mnt_root, mnt, ptr, O_RDONLY, 0);
 	if (IS_ERR(file)) {
 		mconsole_reply(req, "Failed to open file", 1, 0);
 		printk(KERN_ERR "open /proc/%s: %ld\n", ptr, PTR_ERR(file));
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/x86/include/asm/apic.h linux-libre-3.18.31-gnu/arch/x86/include/asm/apic.h
--- linux-libre-3.18.30-gnu/arch/x86/include/asm/apic.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/x86/include/asm/apic.h	2016-04-19 07:57:18.000000000 -0400
@@ -651,8 +651,8 @@ static inline void entering_irq(void)
 
 static inline void entering_ack_irq(void)
 {
-	ack_APIC_irq();
 	entering_irq();
+	ack_APIC_irq();
 }
 
 static inline void exiting_irq(void)
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/x86/include/asm/perf_event.h linux-libre-3.18.31-gnu/arch/x86/include/asm/perf_event.h
--- linux-libre-3.18.30-gnu/arch/x86/include/asm/perf_event.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/x86/include/asm/perf_event.h	2016-04-19 07:57:18.000000000 -0400
@@ -159,6 +159,14 @@ struct x86_pmu_capability {
  */
 #define INTEL_PMC_IDX_FIXED_BTS				(INTEL_PMC_IDX_FIXED + 16)
 
+#define GLOBAL_STATUS_COND_CHG				BIT_ULL(63)
+#define GLOBAL_STATUS_BUFFER_OVF			BIT_ULL(62)
+#define GLOBAL_STATUS_UNC_OVF				BIT_ULL(61)
+#define GLOBAL_STATUS_ASIF				BIT_ULL(60)
+#define GLOBAL_STATUS_COUNTERS_FROZEN			BIT_ULL(59)
+#define GLOBAL_STATUS_LBRS_FROZEN			BIT_ULL(58)
+#define GLOBAL_STATUS_TRACE_TOPAPMI			BIT_ULL(55)
+
 /*
  * IBS cpuid feature detection
  */
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/x86/include/asm/xen/hypervisor.h linux-libre-3.18.31-gnu/arch/x86/include/asm/xen/hypervisor.h
--- linux-libre-3.18.30-gnu/arch/x86/include/asm/xen/hypervisor.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/x86/include/asm/xen/hypervisor.h	2016-04-19 07:57:18.000000000 -0400
@@ -57,4 +57,6 @@ static inline bool xen_x2apic_para_avail
 }
 #endif
 
+extern void xen_set_iopl_mask(unsigned mask);
+
 #endif /* _ASM_X86_XEN_HYPERVISOR_H */
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/x86/include/uapi/asm/msr-index.h linux-libre-3.18.31-gnu/arch/x86/include/uapi/asm/msr-index.h
--- linux-libre-3.18.30-gnu/arch/x86/include/uapi/asm/msr-index.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/x86/include/uapi/asm/msr-index.h	2016-04-19 07:57:18.000000000 -0400
@@ -69,6 +69,12 @@
 #define MSR_LBR_CORE_FROM		0x00000040
 #define MSR_LBR_CORE_TO			0x00000060
 
+#define MSR_LBR_INFO_0			0x00000dc0 /* ... 0xddf for _31 */
+#define LBR_INFO_MISPRED		BIT_ULL(63)
+#define LBR_INFO_IN_TX			BIT_ULL(62)
+#define LBR_INFO_ABORT			BIT_ULL(61)
+#define LBR_INFO_CYCLES			0xffff
+
 #define MSR_IA32_PEBS_ENABLE		0x000003f1
 #define MSR_IA32_DS_AREA		0x00000600
 #define MSR_IA32_PERF_CAPABILITIES	0x00000345
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/x86/kernel/ioport.c linux-libre-3.18.31-gnu/arch/x86/kernel/ioport.c
--- linux-libre-3.18.30-gnu/arch/x86/kernel/ioport.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/x86/kernel/ioport.c	2016-04-19 07:57:18.000000000 -0400
@@ -96,9 +96,14 @@ asmlinkage long sys_ioperm(unsigned long
 SYSCALL_DEFINE1(iopl, unsigned int, level)
 {
 	struct pt_regs *regs = current_pt_regs();
-	unsigned int old = (regs->flags >> 12) & 3;
 	struct thread_struct *t = &current->thread;
 
+	/*
+	 * Careful: the IOPL bits in regs->flags are undefined under Xen PV
+	 * and changing them has no effect.
+	 */
+	unsigned int old = t->iopl >> X86_EFLAGS_IOPL_BIT;
+
 	if (level > 3)
 		return -EINVAL;
 	/* Trying to gain more privileges? */
@@ -106,8 +111,9 @@ SYSCALL_DEFINE1(iopl, unsigned int, leve
 		if (!capable(CAP_SYS_RAWIO))
 			return -EPERM;
 	}
-	regs->flags = (regs->flags & ~X86_EFLAGS_IOPL) | (level << 12);
-	t->iopl = level << 12;
+	regs->flags = (regs->flags & ~X86_EFLAGS_IOPL) |
+		(level << X86_EFLAGS_IOPL_BIT);
+	t->iopl = level << X86_EFLAGS_IOPL_BIT;
 	set_iopl_mask(t->iopl);
 
 	return 0;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/x86/kernel/process_64.c linux-libre-3.18.31-gnu/arch/x86/kernel/process_64.c
--- linux-libre-3.18.30-gnu/arch/x86/kernel/process_64.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/x86/kernel/process_64.c	2016-04-19 07:57:18.000000000 -0400
@@ -49,6 +49,7 @@
 #include <asm/syscalls.h>
 #include <asm/debugreg.h>
 #include <asm/switch_to.h>
+#include <asm/xen/hypervisor.h>
 
 asmlinkage extern void ret_from_fork(void);
 
@@ -424,6 +425,17 @@ __switch_to(struct task_struct *prev_p,
 		     task_thread_info(prev_p)->flags & _TIF_WORK_CTXSW_PREV))
 		__switch_to_xtra(prev_p, next_p, tss);
 
+#ifdef CONFIG_XEN
+	/*
+	 * On Xen PV, IOPL bits in pt_regs->flags have no effect, and
+	 * current_pt_regs()->flags may not match the current task's
+	 * intended IOPL.  We need to switch it manually.
+	 */
+	if (unlikely(xen_pv_domain() &&
+		     prev->iopl != next->iopl))
+		xen_set_iopl_mask(next->iopl);
+#endif
+
 	return prev_p;
 }
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/x86/kvm/i8254.c linux-libre-3.18.31-gnu/arch/x86/kvm/i8254.c
--- linux-libre-3.18.30-gnu/arch/x86/kvm/i8254.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/x86/kvm/i8254.c	2016-04-19 07:57:18.000000000 -0400
@@ -244,7 +244,7 @@ static void kvm_pit_ack_irq(struct kvm_i
 		 * PIC is being reset.  Handle it gracefully here
 		 */
 		atomic_inc(&ps->pending);
-	else if (value > 0)
+	else if (value > 0 && ps->reinject)
 		/* in this case, we had multiple outstanding pit interrupts
 		 * that we needed to inject.  Reinject
 		 */
@@ -287,7 +287,9 @@ static void pit_do_work(struct kthread_w
 	 * last one has been acked.
 	 */
 	spin_lock(&ps->inject_lock);
-	if (ps->irq_ack) {
+	if (!ps->reinject)
+		inject = 1;
+	else if (ps->irq_ack) {
 		ps->irq_ack = 0;
 		inject = 1;
 	}
@@ -316,10 +318,10 @@ static enum hrtimer_restart pit_timer_fn
 	struct kvm_kpit_state *ps = container_of(data, struct kvm_kpit_state, timer);
 	struct kvm_pit *pt = ps->kvm->arch.vpit;
 
-	if (ps->reinject || !atomic_read(&ps->pending)) {
+	if (ps->reinject)
 		atomic_inc(&ps->pending);
-		queue_kthread_work(&pt->worker, &pt->expired);
-	}
+
+	queue_kthread_work(&pt->worker, &pt->expired);
 
 	if (ps->is_periodic) {
 		hrtimer_add_expires_ns(&ps->timer, ps->period);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/x86/kvm/vmx.c linux-libre-3.18.31-gnu/arch/x86/kvm/vmx.c
--- linux-libre-3.18.30-gnu/arch/x86/kvm/vmx.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/x86/kvm/vmx.c	2016-04-19 07:57:18.000000000 -0400
@@ -6740,6 +6740,7 @@ static int handle_invept(struct kvm_vcpu
 	if (!(types & (1UL << type))) {
 		nested_vmx_failValid(vcpu,
 				VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID);
+		skip_emulated_instruction(vcpu);
 		return 1;
 	}
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/x86/kvm/x86.c linux-libre-3.18.31-gnu/arch/x86/kvm/x86.c
--- linux-libre-3.18.30-gnu/arch/x86/kvm/x86.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/x86/kvm/x86.c	2016-04-19 07:57:18.000000000 -0400
@@ -3668,13 +3668,13 @@ static int kvm_vm_ioctl_get_pit(struct k
 
 static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps)
 {
-	int r = 0;
-
+	int i;
 	mutex_lock(&kvm->arch.vpit->pit_state.lock);
 	memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state));
-	kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0);
+	for (i = 0; i < 3; i++)
+		kvm_pit_load_count(kvm, i, ps->channels[i].count, 0);
 	mutex_unlock(&kvm->arch.vpit->pit_state.lock);
-	return r;
+	return 0;
 }
 
 static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps)
@@ -3693,6 +3693,7 @@ static int kvm_vm_ioctl_get_pit2(struct
 static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps)
 {
 	int r = 0, start = 0;
+	int i;
 	u32 prev_legacy, cur_legacy;
 	mutex_lock(&kvm->arch.vpit->pit_state.lock);
 	prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY;
@@ -3702,7 +3703,8 @@ static int kvm_vm_ioctl_set_pit2(struct
 	memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels,
 	       sizeof(kvm->arch.vpit->pit_state.channels));
 	kvm->arch.vpit->pit_state.flags = ps->flags;
-	kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start);
+	for (i = 0; i < 3; i++)
+		kvm_pit_load_count(kvm, i, kvm->arch.vpit->pit_state.channels[i].count, start);
 	mutex_unlock(&kvm->arch.vpit->pit_state.lock);
 	return r;
 }
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/x86/pci/fixup.c linux-libre-3.18.31-gnu/arch/x86/pci/fixup.c
--- linux-libre-3.18.30-gnu/arch/x86/pci/fixup.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/x86/pci/fixup.c	2016-04-19 07:57:18.000000000 -0400
@@ -553,3 +553,10 @@ static void twinhead_reserve_killing_zon
         }
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x27B9, twinhead_reserve_killing_zone);
+
+static void pci_bdwep_bar(struct pci_dev *dev)
+{
+	dev->non_compliant_bars = 1;
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fa0, pci_bdwep_bar);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fc0, pci_bdwep_bar);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/x86/pci/intel_mid_pci.c linux-libre-3.18.31-gnu/arch/x86/pci/intel_mid_pci.c
--- linux-libre-3.18.30-gnu/arch/x86/pci/intel_mid_pci.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/x86/pci/intel_mid_pci.c	2016-04-19 07:57:18.000000000 -0400
@@ -210,6 +210,9 @@ static int intel_mid_pci_irq_enable(stru
 {
 	int polarity;
 
+	if (dev->irq_managed && dev->irq > 0)
+		return 0;
+
 	if (intel_mid_identify_cpu() == INTEL_MID_CPU_CHIP_TANGIER)
 		polarity = 0; /* active high */
 	else
@@ -224,13 +227,18 @@ static int intel_mid_pci_irq_enable(stru
 	if (mp_map_gsi_to_irq(dev->irq, IOAPIC_MAP_ALLOC) < 0)
 		return -EBUSY;
 
+	dev->irq_managed = 1;
+
 	return 0;
 }
 
 static void intel_mid_pci_irq_disable(struct pci_dev *dev)
 {
-	if (!mp_should_keep_irq(&dev->dev) && dev->irq > 0)
+	if (!mp_should_keep_irq(&dev->dev) && dev->irq_managed &&
+	    dev->irq > 0) {
 		mp_unmap_irq(dev->irq);
+		dev->irq_managed = 0;
+	}
 }
 
 struct pci_ops intel_mid_pci_ops = {
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/x86/pci/irq.c linux-libre-3.18.31-gnu/arch/x86/pci/irq.c
--- linux-libre-3.18.30-gnu/arch/x86/pci/irq.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/x86/pci/irq.c	2016-04-19 07:57:18.000000000 -0400
@@ -1202,6 +1202,9 @@ static int pirq_enable_irq(struct pci_de
 			int irq;
 			struct io_apic_irq_attr irq_attr;
 
+			if (dev->irq_managed && dev->irq > 0)
+				return 0;
+
 			irq = IO_APIC_get_PCI_irq_vector(dev->bus->number,
 						PCI_SLOT(dev->devfn),
 						pin - 1, &irq_attr);
@@ -1228,6 +1231,7 @@ static int pirq_enable_irq(struct pci_de
 			}
 			dev = temp_dev;
 			if (irq >= 0) {
+				dev->irq_managed = 1;
 				dev->irq = irq;
 				dev_info(&dev->dev, "PCI->APIC IRQ transform: "
 					 "INT %c -> IRQ %d\n", 'A' + pin - 1, irq);
@@ -1257,8 +1261,9 @@ static int pirq_enable_irq(struct pci_de
 static void pirq_disable_irq(struct pci_dev *dev)
 {
 	if (io_apic_assign_pci_irqs && !mp_should_keep_irq(&dev->dev) &&
-	    dev->irq) {
+	    dev->irq_managed && dev->irq) {
 		mp_unmap_irq(dev->irq);
 		dev->irq = 0;
+		dev->irq_managed = 0;
 	}
 }
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/x86/xen/enlighten.c linux-libre-3.18.31-gnu/arch/x86/xen/enlighten.c
--- linux-libre-3.18.30-gnu/arch/x86/xen/enlighten.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/x86/xen/enlighten.c	2016-04-19 07:57:18.000000000 -0400
@@ -956,7 +956,7 @@ static void xen_load_sp0(struct tss_stru
 	xen_mc_issue(PARAVIRT_LAZY_CPU);
 }
 
-static void xen_set_iopl_mask(unsigned mask)
+void xen_set_iopl_mask(unsigned mask)
 {
 	struct physdev_set_iopl set_iopl;
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/xtensa/kernel/head.S linux-libre-3.18.31-gnu/arch/xtensa/kernel/head.S
--- linux-libre-3.18.30-gnu/arch/xtensa/kernel/head.S	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/xtensa/kernel/head.S	2016-04-19 07:57:18.000000000 -0400
@@ -123,7 +123,7 @@ ENTRY(_startup)
 	wsr	a0, icountlevel
 
 	.set	_index, 0
-	.rept	XCHAL_NUM_DBREAK - 1
+	.rept	XCHAL_NUM_DBREAK
 	wsr	a0, SREG_DBREAKC + _index
 	.set	_index, _index + 1
 	.endr
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/xtensa/mm/cache.c linux-libre-3.18.31-gnu/arch/xtensa/mm/cache.c
--- linux-libre-3.18.30-gnu/arch/xtensa/mm/cache.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/xtensa/mm/cache.c	2016-04-19 07:57:18.000000000 -0400
@@ -97,11 +97,11 @@ void clear_user_highpage(struct page *pa
 	unsigned long paddr;
 	void *kvaddr = coherent_kvaddr(page, TLBTEMP_BASE_1, vaddr, &paddr);
 
-	pagefault_disable();
+	preempt_disable();
 	kmap_invalidate_coherent(page, vaddr);
 	set_bit(PG_arch_1, &page->flags);
 	clear_page_alias(kvaddr, paddr);
-	pagefault_enable();
+	preempt_enable();
 }
 
 void copy_user_highpage(struct page *dst, struct page *src,
@@ -113,11 +113,11 @@ void copy_user_highpage(struct page *dst
 	void *src_vaddr = coherent_kvaddr(src, TLBTEMP_BASE_2, vaddr,
 					  &src_paddr);
 
-	pagefault_disable();
+	preempt_disable();
 	kmap_invalidate_coherent(dst, vaddr);
 	set_bit(PG_arch_1, &dst->flags);
 	copy_page_alias(dst_vaddr, src_vaddr, dst_paddr, src_paddr);
-	pagefault_enable();
+	preempt_enable();
 }
 
 #endif /* DCACHE_WAY_SIZE > PAGE_SIZE */
diff -druNp --no-dereference linux-libre-3.18.30-gnu/arch/xtensa/platforms/iss/console.c linux-libre-3.18.31-gnu/arch/xtensa/platforms/iss/console.c
--- linux-libre-3.18.30-gnu/arch/xtensa/platforms/iss/console.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/arch/xtensa/platforms/iss/console.c	2016-04-19 07:57:18.000000000 -0400
@@ -100,21 +100,23 @@ static void rs_poll(unsigned long priv)
 {
 	struct tty_port *port = (struct tty_port *)priv;
 	int i = 0;
+	int rd = 1;
 	unsigned char c;
 
 	spin_lock(&timer_lock);
 
 	while (simc_poll(0)) {
-		simc_read(0, &c, 1);
+		rd = simc_read(0, &c, 1);
+		if (rd <= 0)
+			break;
 		tty_insert_flip_char(port, c, TTY_NORMAL);
 		i++;
 	}
 
 	if (i)
 		tty_flip_buffer_push(port);
-
-
-	mod_timer(&serial_timer, jiffies + SERIAL_TIMER_VALUE);
+	if (rd)
+		mod_timer(&serial_timer, jiffies + SERIAL_TIMER_VALUE);
 	spin_unlock(&timer_lock);
 }
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/crypto/algif_skcipher.c linux-libre-3.18.31-gnu/crypto/algif_skcipher.c
--- linux-libre-3.18.30-gnu/crypto/algif_skcipher.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/crypto/algif_skcipher.c	2016-04-19 07:57:18.000000000 -0400
@@ -31,6 +31,11 @@ struct skcipher_sg_list {
 	struct scatterlist sg[0];
 };
 
+struct skcipher_tfm {
+	struct crypto_ablkcipher *skcipher;
+	bool has_key;
+};
+
 struct skcipher_ctx {
 	struct list_head tsgl;
 	struct af_alg_sgl rsgl;
@@ -544,19 +549,139 @@ static struct proto_ops algif_skcipher_o
 	.poll		=	skcipher_poll,
 };
 
+static int skcipher_check_key(struct socket *sock)
+{
+	int err = 0;
+	struct sock *psk;
+	struct alg_sock *pask;
+	struct skcipher_tfm *tfm;
+	struct sock *sk = sock->sk;
+	struct alg_sock *ask = alg_sk(sk);
+
+	lock_sock(sk);
+	if (ask->refcnt)
+		goto unlock_child;
+
+	psk = ask->parent;
+	pask = alg_sk(ask->parent);
+	tfm = pask->private;
+
+	err = -ENOKEY;
+	lock_sock_nested(psk, SINGLE_DEPTH_NESTING);
+	if (!tfm->has_key)
+		goto unlock;
+
+	if (!pask->refcnt++)
+		sock_hold(psk);
+
+	ask->refcnt = 1;
+	sock_put(psk);
+
+	err = 0;
+
+unlock:
+	release_sock(psk);
+unlock_child:
+	release_sock(sk);
+
+	return err;
+}
+
+static int skcipher_sendmsg_nokey(struct kiocb *unused, struct socket *sock,
+				  struct msghdr *msg, size_t size)
+{
+	int err;
+
+	err = skcipher_check_key(sock);
+	if (err)
+		return err;
+
+	return skcipher_sendmsg(NULL, sock, msg, size);
+}
+
+static ssize_t skcipher_sendpage_nokey(struct socket *sock, struct page *page,
+				       int offset, size_t size, int flags)
+{
+	int err;
+
+	err = skcipher_check_key(sock);
+	if (err)
+		return err;
+
+	return skcipher_sendpage(sock, page, offset, size, flags);
+}
+
+static int skcipher_recvmsg_nokey(struct kiocb *unused, struct socket *sock,
+				  struct msghdr *msg, size_t ignored, int flags)
+{
+	int err;
+
+	err = skcipher_check_key(sock);
+	if (err)
+		return err;
+
+	return skcipher_recvmsg(NULL, sock, msg, ignored, flags);
+}
+
+static struct proto_ops algif_skcipher_ops_nokey = {
+	.family		=	PF_ALG,
+
+	.connect	=	sock_no_connect,
+	.socketpair	=	sock_no_socketpair,
+	.getname	=	sock_no_getname,
+	.ioctl		=	sock_no_ioctl,
+	.listen		=	sock_no_listen,
+	.shutdown	=	sock_no_shutdown,
+	.getsockopt	=	sock_no_getsockopt,
+	.mmap		=	sock_no_mmap,
+	.bind		=	sock_no_bind,
+	.accept		=	sock_no_accept,
+	.setsockopt	=	sock_no_setsockopt,
+
+	.release	=	af_alg_release,
+	.sendmsg	=	skcipher_sendmsg_nokey,
+	.sendpage	=	skcipher_sendpage_nokey,
+	.recvmsg	=	skcipher_recvmsg_nokey,
+	.poll		=	skcipher_poll,
+};
+
 static void *skcipher_bind(const char *name, u32 type, u32 mask)
 {
-	return crypto_alloc_ablkcipher(name, type, mask);
+	struct skcipher_tfm *tfm;
+	struct crypto_ablkcipher *skcipher;
+
+	tfm = kzalloc(sizeof(*tfm), GFP_KERNEL);
+	if (!tfm)
+		return ERR_PTR(-ENOMEM);
+
+	skcipher = crypto_alloc_ablkcipher(name, type, mask);
+	if (IS_ERR(skcipher)) {
+		kfree(tfm);
+		return ERR_CAST(skcipher);
+	}
+
+	tfm->skcipher = skcipher;
+
+	return tfm;
 }
 
 static void skcipher_release(void *private)
 {
-	crypto_free_ablkcipher(private);
+	struct skcipher_tfm *tfm = private;
+
+	crypto_free_ablkcipher(tfm->skcipher);
+	kfree(tfm);
 }
 
 static int skcipher_setkey(void *private, const u8 *key, unsigned int keylen)
 {
-	return crypto_ablkcipher_setkey(private, key, keylen);
+	struct skcipher_tfm *tfm = private;
+	int err;
+
+	err = crypto_ablkcipher_setkey(tfm->skcipher, key, keylen);
+	tfm->has_key = !err;
+
+	return err;
 }
 
 static void skcipher_sock_destruct(struct sock *sk)
@@ -571,24 +696,27 @@ static void skcipher_sock_destruct(struc
 	af_alg_release_parent(sk);
 }
 
-static int skcipher_accept_parent(void *private, struct sock *sk)
+static int skcipher_accept_parent_nokey(void *private, struct sock *sk)
 {
 	struct skcipher_ctx *ctx;
 	struct alg_sock *ask = alg_sk(sk);
-	unsigned int len = sizeof(*ctx) + crypto_ablkcipher_reqsize(private);
+	struct skcipher_tfm *tfm = private;
+	struct crypto_ablkcipher *skcipher = tfm->skcipher;
+	unsigned int len = sizeof(*ctx) + crypto_ablkcipher_reqsize(skcipher);
 
 	ctx = sock_kmalloc(sk, len, GFP_KERNEL);
 	if (!ctx)
 		return -ENOMEM;
 
-	ctx->iv = sock_kmalloc(sk, crypto_ablkcipher_ivsize(private),
+	ctx->iv = sock_kmalloc(sk, crypto_ablkcipher_ivsize(skcipher),
 			       GFP_KERNEL);
 	if (!ctx->iv) {
 		sock_kfree_s(sk, ctx, len);
 		return -ENOMEM;
 	}
 
-	memset(ctx->iv, 0, crypto_ablkcipher_ivsize(private));
+	memset(ctx->iv, 0, crypto_ablkcipher_ivsize(skcipher));
+
 
 	INIT_LIST_HEAD(&ctx->tsgl);
 	ctx->len = len;
@@ -600,7 +728,7 @@ static int skcipher_accept_parent(void *
 
 	ask->private = ctx;
 
-	ablkcipher_request_set_tfm(&ctx->req, private);
+	ablkcipher_request_set_tfm(&ctx->req, skcipher);
 	ablkcipher_request_set_callback(&ctx->req, CRYPTO_TFM_REQ_MAY_BACKLOG,
 					af_alg_complete, &ctx->completion);
 
@@ -609,12 +737,24 @@ static int skcipher_accept_parent(void *
 	return 0;
 }
 
+static int skcipher_accept_parent(void *private, struct sock *sk)
+{
+	struct skcipher_tfm *tfm = private;
+
+	if (!tfm->has_key)
+		return -ENOKEY;
+
+	return skcipher_accept_parent_nokey(private, sk);
+}
+
 static const struct af_alg_type algif_type_skcipher = {
 	.bind		=	skcipher_bind,
 	.release	=	skcipher_release,
 	.setkey		=	skcipher_setkey,
 	.accept		=	skcipher_accept_parent,
+	.accept_nokey	=	skcipher_accept_parent_nokey,
 	.ops		=	&algif_skcipher_ops,
+	.ops_nokey	=	&algif_skcipher_ops_nokey,
 	.name		=	"skcipher",
 	.owner		=	THIS_MODULE
 };
diff -druNp --no-dereference linux-libre-3.18.30-gnu/Documentation/filesystems/efivarfs.txt linux-libre-3.18.31-gnu/Documentation/filesystems/efivarfs.txt
--- linux-libre-3.18.30-gnu/Documentation/filesystems/efivarfs.txt	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/Documentation/filesystems/efivarfs.txt	2016-04-19 07:57:18.000000000 -0400
@@ -14,3 +14,10 @@ filesystem.
 efivarfs is typically mounted like this,
 
 	mount -t efivarfs none /sys/firmware/efi/efivars
+
+Due to the presence of numerous firmware bugs where removing non-standard
+UEFI variables causes the system firmware to fail to POST, efivarfs
+files that are not well-known standardized variables are created
+as immutable files.  This doesn't prevent removal - "chattr -i" will work -
+but it does prevent this kind of failure from being accomplished
+accidentally.
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/acpi/pci_irq.c linux-libre-3.18.31-gnu/drivers/acpi/pci_irq.c
--- linux-libre-3.18.30-gnu/drivers/acpi/pci_irq.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/acpi/pci_irq.c	2016-04-19 07:57:18.000000000 -0400
@@ -413,6 +413,9 @@ int acpi_pci_irq_enable(struct pci_dev *
 		return 0;
 	}
 
+	if (dev->irq_managed && dev->irq > 0)
+		return 0;
+
 	entry = acpi_pci_irq_lookup(dev, pin);
 	if (!entry) {
 		/*
@@ -456,6 +459,7 @@ int acpi_pci_irq_enable(struct pci_dev *
 		return rc;
 	}
 	dev->irq = rc;
+	dev->irq_managed = 1;
 
 	if (link)
 		snprintf(link_desc, sizeof(link_desc), " -> Link[%s]", link);
@@ -478,7 +482,7 @@ void acpi_pci_irq_disable(struct pci_dev
 	u8 pin;
 
 	pin = dev->pin;
-	if (!pin)
+	if (!pin || !dev->irq_managed || dev->irq <= 0)
 		return;
 
 	/* Keep IOAPIC pin configuration when suspending */
@@ -506,6 +510,9 @@ void acpi_pci_irq_disable(struct pci_dev
 	 */
 
 	dev_dbg(&dev->dev, "PCI INT %c disabled\n", pin_name(pin));
-	if (gsi >= 0 && dev->irq > 0)
+	if (gsi >= 0) {
 		acpi_unregister_gsi(gsi);
+		dev->irq = 0;
+		dev->irq_managed = 0;
+	}
 }
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/block/mtip32xx/mtip32xx.c linux-libre-3.18.31-gnu/drivers/block/mtip32xx/mtip32xx.c
--- linux-libre-3.18.30-gnu/drivers/block/mtip32xx/mtip32xx.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/block/mtip32xx/mtip32xx.c	2016-04-19 07:57:18.000000000 -0400
@@ -705,7 +705,7 @@ static void mtip_handle_tfe(struct drive
 			fail_reason = "thermal shutdown";
 		}
 		if (buf[288] == 0xBF) {
-			set_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag);
+			set_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag);
 			dev_info(&dd->pdev->dev,
 				"Drive indicates rebuild has failed. Secure erase required.\n");
 			fail_all_ncq_cmds = 1;
@@ -896,6 +896,10 @@ static inline irqreturn_t mtip_handle_ir
 
 		/* Acknowledge the interrupt status on the port.*/
 		port_stat = readl(port->mmio + PORT_IRQ_STAT);
+		if (unlikely(port_stat == 0xFFFFFFFF)) {
+			mtip_check_surprise_removal(dd->pdev);
+			return IRQ_HANDLED;
+		}
 		writel(port_stat, port->mmio + PORT_IRQ_STAT);
 
 		/* Demux port status */
@@ -991,15 +995,11 @@ static bool mtip_pause_ncq(struct mtip_p
 	reply = port->rxfis + RX_FIS_D2H_REG;
 	task_file_data = readl(port->mmio+PORT_TFDATA);
 
-	if (fis->command == ATA_CMD_SEC_ERASE_UNIT)
-		clear_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
-
 	if ((task_file_data & 1))
 		return false;
 
 	if (fis->command == ATA_CMD_SEC_ERASE_PREP) {
 		set_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags);
-		set_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
 		port->ic_pause_timer = jiffies;
 		return true;
 	} else if ((fis->command == ATA_CMD_DOWNLOAD_MICRO) &&
@@ -1011,6 +1011,8 @@ static bool mtip_pause_ncq(struct mtip_p
 		((fis->command == 0xFC) &&
 			(fis->features == 0x27 || fis->features == 0x72 ||
 			 fis->features == 0x62 || fis->features == 0x26))) {
+		clear_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
+		clear_bit(MTIP_DDF_REBUILD_FAILED_BIT, &port->dd->dd_flag);
 		/* Com reset after secure erase or lowlevel format */
 		mtip_restart_port(port);
 		return false;
@@ -1102,6 +1104,7 @@ static int mtip_exec_internal_command(st
 	struct mtip_cmd *int_cmd;
 	struct driver_data *dd = port->dd;
 	int rv = 0;
+	unsigned long start;
 
 	/* Make sure the buffer is 8 byte aligned. This is asic specific. */
 	if (buffer & 0x00000007) {
@@ -1164,6 +1167,8 @@ static int mtip_exec_internal_command(st
 	/* Populate the command header */
 	int_cmd->command_header->byte_count = 0;
 
+	start = jiffies;
+
 	/* Issue the command to the hardware */
 	mtip_issue_non_ncq_command(port, MTIP_TAG_INTERNAL);
 
@@ -1172,10 +1177,12 @@ static int mtip_exec_internal_command(st
 		if ((rv = wait_for_completion_interruptible_timeout(
 				&wait,
 				msecs_to_jiffies(timeout))) <= 0) {
+
 			if (rv == -ERESTARTSYS) { /* interrupted */
 				dev_err(&dd->pdev->dev,
-					"Internal command [%02X] was interrupted after %lu ms\n",
-					fis->command, timeout);
+					"Internal command [%02X] was interrupted after %u ms\n",
+					fis->command,
+					jiffies_to_msecs(jiffies - start));
 				rv = -EINTR;
 				goto exec_ic_exit;
 			} else if (rv == 0) /* timeout */
@@ -2780,48 +2787,6 @@ static void mtip_hw_debugfs_exit(struct
 		debugfs_remove_recursive(dd->dfs_node);
 }
 
-static int mtip_free_orphan(struct driver_data *dd)
-{
-	struct kobject *kobj;
-
-	if (dd->bdev) {
-		if (dd->bdev->bd_holders >= 1)
-			return -2;
-
-		bdput(dd->bdev);
-		dd->bdev = NULL;
-	}
-
-	mtip_hw_debugfs_exit(dd);
-
-	spin_lock(&rssd_index_lock);
-	ida_remove(&rssd_index_ida, dd->index);
-	spin_unlock(&rssd_index_lock);
-
-	if (!test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag) &&
-			test_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag)) {
-		put_disk(dd->disk);
-	} else {
-		if (dd->disk) {
-			kobj = kobject_get(&disk_to_dev(dd->disk)->kobj);
-			if (kobj) {
-				mtip_hw_sysfs_exit(dd, kobj);
-				kobject_put(kobj);
-			}
-			del_gendisk(dd->disk);
-			dd->disk = NULL;
-		}
-		if (dd->queue) {
-			dd->queue->queuedata = NULL;
-			blk_cleanup_queue(dd->queue);
-			blk_mq_free_tag_set(&dd->tags);
-			dd->queue = NULL;
-		}
-	}
-	kfree(dd);
-	return 0;
-}
-
 /*
  * Perform any init/resume time hardware setup
  *
@@ -2969,7 +2934,6 @@ static int mtip_service_thread(void *dat
 	unsigned long slot, slot_start, slot_wrap;
 	unsigned int num_cmd_slots = dd->slot_groups * 32;
 	struct mtip_port *port = dd->port;
-	int ret;
 
 	while (1) {
 		if (kthread_should_stop() ||
@@ -3055,18 +3019,6 @@ restart_eh:
 		if (kthread_should_stop())
 			goto st_out;
 	}
-
-	while (1) {
-		ret = mtip_free_orphan(dd);
-		if (!ret) {
-			/* NOTE: All data structures are invalid, do not
-			 * access any here */
-			return 0;
-		}
-		msleep_interruptible(1000);
-		if (kthread_should_stop())
-			goto st_out;
-	}
 st_out:
 	return 0;
 }
@@ -3178,7 +3130,7 @@ static int mtip_hw_get_identify(struct d
 		if (buf[288] == 0xBF) {
 			dev_info(&dd->pdev->dev,
 				"Drive indicates rebuild has failed.\n");
-			/* TODO */
+			set_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag);
 		}
 	}
 
@@ -3352,20 +3304,25 @@ out1:
 	return rv;
 }
 
-static void mtip_standby_drive(struct driver_data *dd)
+static int mtip_standby_drive(struct driver_data *dd)
 {
-	if (dd->sr)
-		return;
+	int rv = 0;
 
+	if (dd->sr || !dd->port)
+		return -ENODEV;
 	/*
 	 * Send standby immediate (E0h) to the drive so that it
 	 * saves its state.
 	 */
 	if (!test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags) &&
-	    !test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag))
-		if (mtip_standby_immediate(dd->port))
+	    !test_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag) &&
+	    !test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag)) {
+		rv = mtip_standby_immediate(dd->port);
+		if (rv)
 			dev_warn(&dd->pdev->dev,
 				"STANDBY IMMEDIATE failed\n");
+	}
+	return rv;
 }
 
 /*
@@ -3394,6 +3351,7 @@ static int mtip_hw_exit(struct driver_da
 	/* Release the IRQ. */
 	irq_set_affinity_hint(dd->pdev->irq, NULL);
 	devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd);
+	msleep(1000);
 
 	/* Free dma regions */
 	mtip_dma_free(dd);
@@ -3422,8 +3380,7 @@ static int mtip_hw_shutdown(struct drive
 	 * Send standby immediate (E0h) to the drive so that it
 	 * saves its state.
 	 */
-	if (!dd->sr && dd->port)
-		mtip_standby_immediate(dd->port);
+	mtip_standby_drive(dd);
 
 	return 0;
 }
@@ -3446,7 +3403,7 @@ static int mtip_hw_suspend(struct driver
 	 * Send standby immediate (E0h) to the drive
 	 * so that it saves its state.
 	 */
-	if (mtip_standby_immediate(dd->port) != 0) {
+	if (mtip_standby_drive(dd) != 0) {
 		dev_err(&dd->pdev->dev,
 			"Failed standby-immediate command\n");
 		return -EFAULT;
@@ -3684,6 +3641,28 @@ static int mtip_block_getgeo(struct bloc
 	return 0;
 }
 
+static int mtip_block_open(struct block_device *dev, fmode_t mode)
+{
+	struct driver_data *dd;
+
+	if (dev && dev->bd_disk) {
+		dd = (struct driver_data *) dev->bd_disk->private_data;
+
+		if (dd) {
+			if (test_bit(MTIP_DDF_REMOVAL_BIT,
+							&dd->dd_flag)) {
+				return -ENODEV;
+			}
+			return 0;
+		}
+	}
+	return -ENODEV;
+}
+
+void mtip_block_release(struct gendisk *disk, fmode_t mode)
+{
+}
+
 /*
  * Block device operation function.
  *
@@ -3691,6 +3670,8 @@ static int mtip_block_getgeo(struct bloc
  * layer.
  */
 static const struct block_device_operations mtip_block_ops = {
+	.open		= mtip_block_open,
+	.release	= mtip_block_release,
 	.ioctl		= mtip_block_ioctl,
 #ifdef CONFIG_COMPAT
 	.compat_ioctl	= mtip_block_compat_ioctl,
@@ -3729,10 +3710,9 @@ static int mtip_submit_request(struct bl
 				rq_data_dir(rq))) {
 			return -ENODATA;
 		}
-		if (unlikely(test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag)))
+		if (unlikely(test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag) ||
+			test_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag)))
 			return -ENODATA;
-		if (test_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag))
-			return -ENXIO;
 	}
 
 	if (rq->cmd_flags & REQ_DISCARD) {
@@ -4065,52 +4045,51 @@ static int mtip_block_remove(struct driv
 {
 	struct kobject *kobj;
 
-	if (!dd->sr) {
-		mtip_hw_debugfs_exit(dd);
+	mtip_hw_debugfs_exit(dd);
 
-		if (dd->mtip_svc_handler) {
-			set_bit(MTIP_PF_SVC_THD_STOP_BIT, &dd->port->flags);
-			wake_up_interruptible(&dd->port->svc_wait);
-			kthread_stop(dd->mtip_svc_handler);
-		}
+	if (dd->mtip_svc_handler) {
+		set_bit(MTIP_PF_SVC_THD_STOP_BIT, &dd->port->flags);
+		wake_up_interruptible(&dd->port->svc_wait);
+		kthread_stop(dd->mtip_svc_handler);
+	}
 
-		/* Clean up the sysfs attributes, if created */
-		if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag)) {
-			kobj = kobject_get(&disk_to_dev(dd->disk)->kobj);
-			if (kobj) {
-				mtip_hw_sysfs_exit(dd, kobj);
-				kobject_put(kobj);
-			}
+	/* Clean up the sysfs attributes, if created */
+	if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag)) {
+		kobj = kobject_get(&disk_to_dev(dd->disk)->kobj);
+		if (kobj) {
+			mtip_hw_sysfs_exit(dd, kobj);
+			kobject_put(kobj);
 		}
+	}
 
+	if (!dd->sr)
 		mtip_standby_drive(dd);
-
-		/*
-		 * Delete our gendisk structure. This also removes the device
-		 * from /dev
-		 */
-		if (dd->bdev) {
-			bdput(dd->bdev);
-			dd->bdev = NULL;
-		}
-		if (dd->disk) {
-			if (dd->disk->queue) {
-				del_gendisk(dd->disk);
-				blk_cleanup_queue(dd->queue);
-				blk_mq_free_tag_set(&dd->tags);
-				dd->queue = NULL;
-			} else
-				put_disk(dd->disk);
-		}
-		dd->disk  = NULL;
-
-		spin_lock(&rssd_index_lock);
-		ida_remove(&rssd_index_ida, dd->index);
-		spin_unlock(&rssd_index_lock);
-	} else {
+	else
 		dev_info(&dd->pdev->dev, "device %s surprise removal\n",
 						dd->disk->disk_name);
+
+	/*
+	 * Delete our gendisk structure. This also removes the device
+	 * from /dev
+	 */
+	if (dd->bdev) {
+		bdput(dd->bdev);
+		dd->bdev = NULL;
+	}
+	if (dd->disk) {
+		del_gendisk(dd->disk);
+		if (dd->disk->queue) {
+			blk_cleanup_queue(dd->queue);
+			blk_mq_free_tag_set(&dd->tags);
+			dd->queue = NULL;
+		}
+		put_disk(dd->disk);
 	}
+	dd->disk  = NULL;
+
+	spin_lock(&rssd_index_lock);
+	ida_remove(&rssd_index_ida, dd->index);
+	spin_unlock(&rssd_index_lock);
 
 	/* De-initialize the protocol layer. */
 	mtip_hw_exit(dd);
@@ -4139,12 +4118,12 @@ static int mtip_block_shutdown(struct dr
 		dev_info(&dd->pdev->dev,
 			"Shutting down %s ...\n", dd->disk->disk_name);
 
+		del_gendisk(dd->disk);
 		if (dd->disk->queue) {
-			del_gendisk(dd->disk);
 			blk_cleanup_queue(dd->queue);
 			blk_mq_free_tag_set(&dd->tags);
-		} else
-			put_disk(dd->disk);
+		}
+		put_disk(dd->disk);
 		dd->disk  = NULL;
 		dd->queue = NULL;
 	}
@@ -4484,7 +4463,7 @@ static void mtip_pci_remove(struct pci_d
 	struct driver_data *dd = pci_get_drvdata(pdev);
 	unsigned long flags, to;
 
-	set_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag);
+	set_bit(MTIP_DDF_REMOVAL_BIT, &dd->dd_flag);
 
 	spin_lock_irqsave(&dev_lock, flags);
 	list_del_init(&dd->online_list);
@@ -4501,11 +4480,18 @@ static void mtip_pci_remove(struct pci_d
 	} while (atomic_read(&dd->irq_workers_active) != 0 &&
 		time_before(jiffies, to));
 
+	fsync_bdev(dd->bdev);
+
 	if (atomic_read(&dd->irq_workers_active) != 0) {
 		dev_warn(&dd->pdev->dev,
 			"Completion workers still active!\n");
 	}
 
+	if (dd->sr)
+		blk_mq_stop_hw_queues(dd->queue);
+
+	set_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag);
+
 	/* Clean up the block layer. */
 	mtip_block_remove(dd);
 
@@ -4523,10 +4509,8 @@ static void mtip_pci_remove(struct pci_d
 	list_del_init(&dd->remove_list);
 	spin_unlock_irqrestore(&dev_lock, flags);
 
-	if (!dd->sr)
-		kfree(dd);
-	else
-		set_bit(MTIP_DDF_REMOVE_DONE_BIT, &dd->dd_flag);
+	kfree(dd);
+	set_bit(MTIP_DDF_REMOVE_DONE_BIT, &dd->dd_flag);
 
 	pcim_iounmap_regions(pdev, 1 << MTIP_ABAR);
 	pci_set_drvdata(pdev, NULL);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/block/mtip32xx/mtip32xx.h linux-libre-3.18.31-gnu/drivers/block/mtip32xx/mtip32xx.h
--- linux-libre-3.18.30-gnu/drivers/block/mtip32xx/mtip32xx.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/block/mtip32xx/mtip32xx.h	2016-04-19 07:57:18.000000000 -0400
@@ -155,6 +155,7 @@ enum {
 	MTIP_DDF_RESUME_BIT         = 6,
 	MTIP_DDF_INIT_DONE_BIT      = 7,
 	MTIP_DDF_REBUILD_FAILED_BIT = 8,
+	MTIP_DDF_REMOVAL_BIT	    = 9,
 
 	MTIP_DDF_STOP_IO      = ((1 << MTIP_DDF_REMOVE_PENDING_BIT) |
 				(1 << MTIP_DDF_SEC_LOCK_BIT) |
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/bluetooth/ath3k.c linux-libre-3.18.31-gnu/drivers/bluetooth/ath3k.c
--- linux-libre-3.18.30-gnu/drivers/bluetooth/ath3k.c	2016-04-07 00:10:29.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/bluetooth/ath3k.c	2016-04-21 11:55:28.000000000 -0400
@@ -82,6 +82,7 @@ static const struct usb_device_id ath3k_
 	{ USB_DEVICE(0x0489, 0xe05f) },
 	{ USB_DEVICE(0x0489, 0xe076) },
 	{ USB_DEVICE(0x0489, 0xe078) },
+	{ USB_DEVICE(0x0489, 0xe095) },
 	{ USB_DEVICE(0x04c5, 0x1330) },
 	{ USB_DEVICE(0x04CA, 0x3004) },
 	{ USB_DEVICE(0x04CA, 0x3005) },
@@ -92,6 +93,7 @@ static const struct usb_device_id ath3k_
 	{ USB_DEVICE(0x04CA, 0x300d) },
 	{ USB_DEVICE(0x04CA, 0x300f) },
 	{ USB_DEVICE(0x04CA, 0x3010) },
+	{ USB_DEVICE(0x04CA, 0x3014) },
 	{ USB_DEVICE(0x0930, 0x0219) },
 	{ USB_DEVICE(0x0930, 0x0220) },
 	{ USB_DEVICE(0x0930, 0x0227) },
@@ -111,10 +113,12 @@ static const struct usb_device_id ath3k_
 	{ USB_DEVICE(0x13d3, 0x3362) },
 	{ USB_DEVICE(0x13d3, 0x3375) },
 	{ USB_DEVICE(0x13d3, 0x3393) },
+	{ USB_DEVICE(0x13d3, 0x3395) },
 	{ USB_DEVICE(0x13d3, 0x3402) },
 	{ USB_DEVICE(0x13d3, 0x3408) },
 	{ USB_DEVICE(0x13d3, 0x3423) },
 	{ USB_DEVICE(0x13d3, 0x3432) },
+	{ USB_DEVICE(0x13d3, 0x3472) },
 	{ USB_DEVICE(0x13d3, 0x3474) },
 
 	/* Atheros AR5BBU12 with sflash firmware */
@@ -142,6 +146,7 @@ static const struct usb_device_id ath3k_
 	{ USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0489, 0xe076), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0489, 0xe078), .driver_info = BTUSB_ATH3012 },
+	{ USB_DEVICE(0x0489, 0xe095), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
@@ -152,6 +157,7 @@ static const struct usb_device_id ath3k_
 	{ USB_DEVICE(0x04ca, 0x300d), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
+	{ USB_DEVICE(0x04ca, 0x3014), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0930, 0x0227), .driver_info = BTUSB_ATH3012 },
@@ -171,10 +177,12 @@ static const struct usb_device_id ath3k_
 	{ USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
+	{ USB_DEVICE(0x13d3, 0x3395), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3423), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
+	{ USB_DEVICE(0x13d3, 0x3472), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3474), .driver_info = BTUSB_ATH3012 },
 
 	/* Atheros AR5BBU22 with sflash firmware */
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/bluetooth/btusb.c linux-libre-3.18.31-gnu/drivers/bluetooth/btusb.c
--- linux-libre-3.18.30-gnu/drivers/bluetooth/btusb.c	2016-04-07 00:10:38.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/bluetooth/btusb.c	2016-04-21 11:55:52.000000000 -0400
@@ -174,6 +174,7 @@ static const struct usb_device_id blackl
 	{ USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0489, 0xe076), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0489, 0xe078), .driver_info = BTUSB_ATH3012 },
+	{ USB_DEVICE(0x0489, 0xe095), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
@@ -184,6 +185,7 @@ static const struct usb_device_id blackl
 	{ USB_DEVICE(0x04ca, 0x300d), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
+	{ USB_DEVICE(0x04ca, 0x3014), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0930, 0x0227), .driver_info = BTUSB_ATH3012 },
@@ -203,10 +205,12 @@ static const struct usb_device_id blackl
 	{ USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
+	{ USB_DEVICE(0x13d3, 0x3395), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3423), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
+	{ USB_DEVICE(0x13d3, 0x3472), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3474), .driver_info = BTUSB_ATH3012 },
 
 	/* Atheros AR5BBU12 with sflash firmware */
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/bus/imx-weim.c linux-libre-3.18.31-gnu/drivers/bus/imx-weim.c
--- linux-libre-3.18.30-gnu/drivers/bus/imx-weim.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/bus/imx-weim.c	2016-04-19 07:57:18.000000000 -0400
@@ -150,7 +150,7 @@ static int __init weim_parse_dt(struct p
 			return ret;
 	}
 
-	for_each_child_of_node(pdev->dev.of_node, child) {
+	for_each_available_child_of_node(pdev->dev.of_node, child) {
 		if (!child->name)
 			continue;
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/clk/rockchip/clk-rk3188.c linux-libre-3.18.31-gnu/drivers/clk/rockchip/clk-rk3188.c
--- linux-libre-3.18.30-gnu/drivers/clk/rockchip/clk-rk3188.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/clk/rockchip/clk-rk3188.c	2016-04-19 07:57:18.000000000 -0400
@@ -713,6 +713,8 @@ static const char *rk3188_critical_clock
 	"aclk_cpu",
 	"aclk_peri",
 	"hclk_peri",
+	"pclk_cpu",
+	"pclk_peri",
 };
 
 static void __init rk3188_common_clk_init(struct device_node *np)
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/crypto/ccp/ccp-crypto-aes-cmac.c linux-libre-3.18.31-gnu/drivers/crypto/ccp/ccp-crypto-aes-cmac.c
--- linux-libre-3.18.30-gnu/drivers/crypto/ccp/ccp-crypto-aes-cmac.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/crypto/ccp/ccp-crypto-aes-cmac.c	2016-04-19 07:57:18.000000000 -0400
@@ -201,6 +201,39 @@ static int ccp_aes_cmac_digest(struct ah
 	return ccp_aes_cmac_finup(req);
 }
 
+static int ccp_aes_cmac_export(struct ahash_request *req, void *out)
+{
+	struct ccp_aes_cmac_req_ctx *rctx = ahash_request_ctx(req);
+	struct ccp_aes_cmac_exp_ctx state;
+
+	state.null_msg = rctx->null_msg;
+	memcpy(state.iv, rctx->iv, sizeof(state.iv));
+	state.buf_count = rctx->buf_count;
+	memcpy(state.buf, rctx->buf, sizeof(state.buf));
+
+	/* 'out' may not be aligned so memcpy from local variable */
+	memcpy(out, &state, sizeof(state));
+
+	return 0;
+}
+
+static int ccp_aes_cmac_import(struct ahash_request *req, const void *in)
+{
+	struct ccp_aes_cmac_req_ctx *rctx = ahash_request_ctx(req);
+	struct ccp_aes_cmac_exp_ctx state;
+
+	/* 'in' may not be aligned so memcpy to local variable */
+	memcpy(&state, in, sizeof(state));
+
+	memset(rctx, 0, sizeof(*rctx));
+	rctx->null_msg = state.null_msg;
+	memcpy(rctx->iv, state.iv, sizeof(rctx->iv));
+	rctx->buf_count = state.buf_count;
+	memcpy(rctx->buf, state.buf, sizeof(rctx->buf));
+
+	return 0;
+}
+
 static int ccp_aes_cmac_setkey(struct crypto_ahash *tfm, const u8 *key,
 			   unsigned int key_len)
 {
@@ -332,10 +365,13 @@ int ccp_register_aes_cmac_algs(struct li
 	alg->final = ccp_aes_cmac_final;
 	alg->finup = ccp_aes_cmac_finup;
 	alg->digest = ccp_aes_cmac_digest;
+	alg->export = ccp_aes_cmac_export;
+	alg->import = ccp_aes_cmac_import;
 	alg->setkey = ccp_aes_cmac_setkey;
 
 	halg = &alg->halg;
 	halg->digestsize = AES_BLOCK_SIZE;
+	halg->statesize = sizeof(struct ccp_aes_cmac_exp_ctx);
 
 	base = &halg->base;
 	snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME, "cmac(aes)");
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/crypto/ccp/ccp-crypto.h linux-libre-3.18.31-gnu/drivers/crypto/ccp/ccp-crypto.h
--- linux-libre-3.18.30-gnu/drivers/crypto/ccp/ccp-crypto.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/crypto/ccp/ccp-crypto.h	2016-04-19 07:57:18.000000000 -0400
@@ -132,6 +132,15 @@ struct ccp_aes_cmac_req_ctx {
 	struct ccp_cmd cmd;
 };
 
+struct ccp_aes_cmac_exp_ctx {
+	unsigned int null_msg;
+
+	u8 iv[AES_BLOCK_SIZE];
+
+	unsigned int buf_count;
+	u8 buf[AES_BLOCK_SIZE];
+};
+
 /***** SHA related defines *****/
 #define MAX_SHA_CONTEXT_SIZE	SHA256_DIGEST_SIZE
 #define MAX_SHA_BLOCK_SIZE	SHA256_BLOCK_SIZE
@@ -174,6 +183,19 @@ struct ccp_sha_req_ctx {
 	struct ccp_cmd cmd;
 };
 
+struct ccp_sha_exp_ctx {
+	enum ccp_sha_type type;
+
+	u64 msg_bits;
+
+	unsigned int first;
+
+	u8 ctx[MAX_SHA_CONTEXT_SIZE];
+
+	unsigned int buf_count;
+	u8 buf[MAX_SHA_BLOCK_SIZE];
+};
+
 /***** Common Context Structure *****/
 struct ccp_ctx {
 	int (*complete)(struct crypto_async_request *req, int ret);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/crypto/ccp/ccp-crypto-sha.c linux-libre-3.18.31-gnu/drivers/crypto/ccp/ccp-crypto-sha.c
--- linux-libre-3.18.30-gnu/drivers/crypto/ccp/ccp-crypto-sha.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/crypto/ccp/ccp-crypto-sha.c	2016-04-19 07:57:18.000000000 -0400
@@ -193,6 +193,43 @@ static int ccp_sha_digest(struct ahash_r
 	return ccp_sha_finup(req);
 }
 
+static int ccp_sha_export(struct ahash_request *req, void *out)
+{
+	struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req);
+	struct ccp_sha_exp_ctx state;
+
+	state.type = rctx->type;
+	state.msg_bits = rctx->msg_bits;
+	state.first = rctx->first;
+	memcpy(state.ctx, rctx->ctx, sizeof(state.ctx));
+	state.buf_count = rctx->buf_count;
+	memcpy(state.buf, rctx->buf, sizeof(state.buf));
+
+	/* 'out' may not be aligned so memcpy from local variable */
+	memcpy(out, &state, sizeof(state));
+
+	return 0;
+}
+
+static int ccp_sha_import(struct ahash_request *req, const void *in)
+{
+	struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req);
+	struct ccp_sha_exp_ctx state;
+
+	/* 'in' may not be aligned so memcpy to local variable */
+	memcpy(&state, in, sizeof(state));
+
+	memset(rctx, 0, sizeof(*rctx));
+	rctx->type = state.type;
+	rctx->msg_bits = state.msg_bits;
+	rctx->first = state.first;
+	memcpy(rctx->ctx, state.ctx, sizeof(rctx->ctx));
+	rctx->buf_count = state.buf_count;
+	memcpy(rctx->buf, state.buf, sizeof(rctx->buf));
+
+	return 0;
+}
+
 static int ccp_sha_setkey(struct crypto_ahash *tfm, const u8 *key,
 			  unsigned int key_len)
 {
@@ -388,9 +425,12 @@ static int ccp_register_sha_alg(struct l
 	alg->final = ccp_sha_final;
 	alg->finup = ccp_sha_finup;
 	alg->digest = ccp_sha_digest;
+	alg->export = ccp_sha_export;
+	alg->import = ccp_sha_import;
 
 	halg = &alg->halg;
 	halg->digestsize = def->digest_size;
+	halg->statesize = sizeof(struct ccp_sha_exp_ctx);
 
 	base = &halg->base;
 	snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/edac/amd64_edac.c linux-libre-3.18.31-gnu/drivers/edac/amd64_edac.c
--- linux-libre-3.18.30-gnu/drivers/edac/amd64_edac.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/edac/amd64_edac.c	2016-04-19 07:57:18.000000000 -0400
@@ -1316,7 +1316,7 @@ static u64 f1x_get_norm_dct_addr(struct
 	u64 chan_off;
 	u64 dram_base		= get_dram_base(pvt, range);
 	u64 hole_off		= f10_dhar_offset(pvt);
-	u64 dct_sel_base_off	= (pvt->dct_sel_hi & 0xFFFFFC00) << 16;
+	u64 dct_sel_base_off	= (u64)(pvt->dct_sel_hi & 0xFFFFFC00) << 16;
 
 	if (hi_rng) {
 		/*
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/edac/sb_edac.c linux-libre-3.18.31-gnu/drivers/edac/sb_edac.c
--- linux-libre-3.18.30-gnu/drivers/edac/sb_edac.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/edac/sb_edac.c	2016-04-19 07:57:18.000000000 -0400
@@ -991,8 +991,8 @@ static void get_memory_layout(const stru
 		edac_dbg(0, "TAD#%d: up to %u.%03u GB (0x%016Lx), socket interleave %d, memory interleave %d, TGT: %d, %d, %d, %d, reg=0x%08x\n",
 			 n_tads, gb, (mb*1000)/1024,
 			 ((u64)tmp_mb) << 20L,
-			 (u32)TAD_SOCK(reg),
-			 (u32)TAD_CH(reg),
+			 (u32)(1 << TAD_SOCK(reg)),
+			 (u32)TAD_CH(reg) + 1,
 			 (u32)TAD_TGT0(reg),
 			 (u32)TAD_TGT1(reg),
 			 (u32)TAD_TGT2(reg),
@@ -1264,7 +1264,7 @@ static int get_memory_error_data(struct
 	}
 
 	ch_way = TAD_CH(reg) + 1;
-	sck_way = TAD_SOCK(reg) + 1;
+	sck_way = 1 << TAD_SOCK(reg);
 
 	if (ch_way == 3)
 		idx = addr >> 6;
@@ -1321,7 +1321,7 @@ static int get_memory_error_data(struct
 		 n_tads,
 		 addr,
 		 limit,
-		 (u32)TAD_SOCK(reg),
+		 sck_way,
 		 ch_way,
 		 offset,
 		 idx,
@@ -1336,18 +1336,12 @@ static int get_memory_error_data(struct
 			offset, addr);
 		return -EINVAL;
 	}
-	addr -= offset;
-	/* Store the low bits [0:6] of the addr */
-	ch_addr = addr & 0x7f;
-	/* Remove socket wayness and remove 6 bits */
-	addr >>= 6;
-	addr = div_u64(addr, sck_xch);
-#if 0
-	/* Divide by channel way */
-	addr = addr / ch_way;
-#endif
-	/* Recover the last 6 bits */
-	ch_addr |= addr << 6;
+
+	ch_addr = addr - offset;
+	ch_addr >>= (6 + shiftup);
+	ch_addr /= ch_way * sck_way;
+	ch_addr <<= (6 + shiftup);
+	ch_addr |= addr & ((1 << (6 + shiftup)) - 1);
 
 	/*
 	 * Step 3) Decode rank
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/firmware/efi/efivars.c linux-libre-3.18.31-gnu/drivers/firmware/efi/efivars.c
--- linux-libre-3.18.30-gnu/drivers/firmware/efi/efivars.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/firmware/efi/efivars.c	2016-04-19 07:57:18.000000000 -0400
@@ -221,7 +221,7 @@ sanity_check(struct efi_variable *var, e
 	}
 
 	if ((attributes & ~EFI_VARIABLE_MASK) != 0 ||
-	    efivar_validate(name, data, size) == false) {
+	    efivar_validate(vendor, name, data, size) == false) {
 		printk(KERN_ERR "efivars: Malformed variable content\n");
 		return -EINVAL;
 	}
@@ -447,7 +447,8 @@ static ssize_t efivar_create(struct file
 	}
 
 	if ((attributes & ~EFI_VARIABLE_MASK) != 0 ||
-	    efivar_validate(name, data, size) == false) {
+	    efivar_validate(new_var->VendorGuid, name, data,
+			    size) == false) {
 		printk(KERN_ERR "efivars: Malformed variable content\n");
 		return -EINVAL;
 	}
@@ -535,50 +536,44 @@ static ssize_t efivar_delete(struct file
  * efivar_create_sysfs_entry - create a new entry in sysfs
  * @new_var: efivar entry to create
  *
- * Returns 1 on failure, 0 on success
+ * Returns 0 on success, negative error code on failure
  */
 static int
 efivar_create_sysfs_entry(struct efivar_entry *new_var)
 {
-	int i, short_name_size;
+	int short_name_size;
 	char *short_name;
-	unsigned long variable_name_size;
-	efi_char16_t *variable_name;
-
-	variable_name = new_var->var.VariableName;
-	variable_name_size = ucs2_strlen(variable_name) * sizeof(efi_char16_t);
+	unsigned long utf8_name_size;
+	efi_char16_t *variable_name = new_var->var.VariableName;
+	int ret;
 
 	/*
-	 * Length of the variable bytes in ASCII, plus the '-' separator,
+	 * Length of the variable bytes in UTF8, plus the '-' separator,
 	 * plus the GUID, plus trailing NUL
 	 */
-	short_name_size = variable_name_size / sizeof(efi_char16_t)
-				+ 1 + EFI_VARIABLE_GUID_LEN + 1;
-
-	short_name = kzalloc(short_name_size, GFP_KERNEL);
+	utf8_name_size = ucs2_utf8size(variable_name);
+	short_name_size = utf8_name_size + 1 + EFI_VARIABLE_GUID_LEN + 1;
 
+	short_name = kmalloc(short_name_size, GFP_KERNEL);
 	if (!short_name)
-		return 1;
+		return -ENOMEM;
+
+	ucs2_as_utf8(short_name, variable_name, short_name_size);
 
-	/* Convert Unicode to normal chars (assume top bits are 0),
-	   ala UTF-8 */
-	for (i=0; i < (int)(variable_name_size / sizeof(efi_char16_t)); i++) {
-		short_name[i] = variable_name[i] & 0xFF;
-	}
 	/* This is ugly, but necessary to separate one vendor's
 	   private variables from another's.         */
 
-	*(short_name + strlen(short_name)) = '-';
+	short_name[utf8_name_size] = '-';
 	efi_guid_unparse(&new_var->var.VendorGuid,
-			 short_name + strlen(short_name));
+			 short_name + utf8_name_size + 1);
 
 	new_var->kobj.kset = efivars_kset;
 
-	i = kobject_init_and_add(&new_var->kobj, &efivar_ktype,
+	ret = kobject_init_and_add(&new_var->kobj, &efivar_ktype,
 				   NULL, "%s", short_name);
 	kfree(short_name);
-	if (i)
-		return 1;
+	if (ret)
+		return ret;
 
 	kobject_uevent(&new_var->kobj, KOBJ_ADD);
 	efivar_entry_add(new_var, &efivar_sysfs_list);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/firmware/efi/vars.c linux-libre-3.18.31-gnu/drivers/firmware/efi/vars.c
--- linux-libre-3.18.30-gnu/drivers/firmware/efi/vars.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/firmware/efi/vars.c	2016-04-19 07:57:18.000000000 -0400
@@ -165,67 +165,133 @@ validate_ascii_string(efi_char16_t *var_
 }
 
 struct variable_validate {
+	efi_guid_t vendor;
 	char *name;
 	bool (*validate)(efi_char16_t *var_name, int match, u8 *data,
 			 unsigned long len);
 };
 
+/*
+ * This is the list of variables we need to validate, as well as the
+ * whitelist for what we think is safe not to default to immutable.
+ *
+ * If it has a validate() method that's not NULL, it'll go into the
+ * validation routine.  If not, it is assumed valid, but still used for
+ * whitelisting.
+ *
+ * Note that it's sorted by {vendor,name}, but globbed names must come after
+ * any other name with the same prefix.
+ */
 static const struct variable_validate variable_validate[] = {
-	{ "BootNext", validate_uint16 },
-	{ "BootOrder", validate_boot_order },
-	{ "DriverOrder", validate_boot_order },
-	{ "Boot*", validate_load_option },
-	{ "Driver*", validate_load_option },
-	{ "ConIn", validate_device_path },
-	{ "ConInDev", validate_device_path },
-	{ "ConOut", validate_device_path },
-	{ "ConOutDev", validate_device_path },
-	{ "ErrOut", validate_device_path },
-	{ "ErrOutDev", validate_device_path },
-	{ "Timeout", validate_uint16 },
-	{ "Lang", validate_ascii_string },
-	{ "PlatformLang", validate_ascii_string },
-	{ "", NULL },
+	{ EFI_GLOBAL_VARIABLE_GUID, "BootNext", validate_uint16 },
+	{ EFI_GLOBAL_VARIABLE_GUID, "BootOrder", validate_boot_order },
+	{ EFI_GLOBAL_VARIABLE_GUID, "Boot*", validate_load_option },
+	{ EFI_GLOBAL_VARIABLE_GUID, "DriverOrder", validate_boot_order },
+	{ EFI_GLOBAL_VARIABLE_GUID, "Driver*", validate_load_option },
+	{ EFI_GLOBAL_VARIABLE_GUID, "ConIn", validate_device_path },
+	{ EFI_GLOBAL_VARIABLE_GUID, "ConInDev", validate_device_path },
+	{ EFI_GLOBAL_VARIABLE_GUID, "ConOut", validate_device_path },
+	{ EFI_GLOBAL_VARIABLE_GUID, "ConOutDev", validate_device_path },
+	{ EFI_GLOBAL_VARIABLE_GUID, "ErrOut", validate_device_path },
+	{ EFI_GLOBAL_VARIABLE_GUID, "ErrOutDev", validate_device_path },
+	{ EFI_GLOBAL_VARIABLE_GUID, "Lang", validate_ascii_string },
+	{ EFI_GLOBAL_VARIABLE_GUID, "OsIndications", NULL },
+	{ EFI_GLOBAL_VARIABLE_GUID, "PlatformLang", validate_ascii_string },
+	{ EFI_GLOBAL_VARIABLE_GUID, "Timeout", validate_uint16 },
+	{ LINUX_EFI_CRASH_GUID, "*", NULL },
+	{ NULL_GUID, "", NULL },
 };
 
+static bool
+variable_matches(const char *var_name, size_t len, const char *match_name,
+		 int *match)
+{
+	for (*match = 0; ; (*match)++) {
+		char c = match_name[*match];
+		char u = var_name[*match];
+
+		/* Wildcard in the matching name means we've matched */
+		if (c == '*')
+			return true;
+
+		/* Case sensitive match */
+		if (!c && *match == len)
+			return true;
+
+		if (c != u)
+			return false;
+
+		if (!c)
+			return true;
+	}
+	return true;
+}
+
 bool
-efivar_validate(efi_char16_t *var_name, u8 *data, unsigned long len)
+efivar_validate(efi_guid_t vendor, efi_char16_t *var_name, u8 *data,
+		unsigned long data_size)
 {
 	int i;
-	u16 *unicode_name = var_name;
+	unsigned long utf8_size;
+	u8 *utf8_name;
 
-	for (i = 0; variable_validate[i].validate != NULL; i++) {
-		const char *name = variable_validate[i].name;
-		int match;
+	utf8_size = ucs2_utf8size(var_name);
+	utf8_name = kmalloc(utf8_size + 1, GFP_KERNEL);
+	if (!utf8_name)
+		return false;
 
-		for (match = 0; ; match++) {
-			char c = name[match];
-			u16 u = unicode_name[match];
+	ucs2_as_utf8(utf8_name, var_name, utf8_size);
+	utf8_name[utf8_size] = '\0';
 
-			/* All special variables are plain ascii */
-			if (u > 127)
-				return true;
+	for (i = 0; variable_validate[i].name[0] != '\0'; i++) {
+		const char *name = variable_validate[i].name;
+		int match = 0;
 
-			/* Wildcard in the matching name means we've matched */
-			if (c == '*')
-				return variable_validate[i].validate(var_name,
-							     match, data, len);
+		if (efi_guidcmp(vendor, variable_validate[i].vendor))
+			continue;
 
-			/* Case sensitive match */
-			if (c != u)
+		if (variable_matches(utf8_name, utf8_size+1, name, &match)) {
+			if (variable_validate[i].validate == NULL)
 				break;
-
-			/* Reached the end of the string while matching */
-			if (!c)
-				return variable_validate[i].validate(var_name,
-							     match, data, len);
+			kfree(utf8_name);
+			return variable_validate[i].validate(var_name, match,
+							     data, data_size);
 		}
 	}
-
+	kfree(utf8_name);
 	return true;
 }
 EXPORT_SYMBOL_GPL(efivar_validate);
 
+bool
+efivar_variable_is_removable(efi_guid_t vendor, const char *var_name,
+			     size_t len)
+{
+	int i;
+	bool found = false;
+	int match = 0;
+
+	/*
+	 * Check if our variable is in the validated variables list
+	 */
+	for (i = 0; variable_validate[i].name[0] != '\0'; i++) {
+		if (efi_guidcmp(variable_validate[i].vendor, vendor))
+			continue;
+
+		if (variable_matches(var_name, len,
+				     variable_validate[i].name, &match)) {
+			found = true;
+			break;
+		}
+	}
+
+	/*
+	 * If it's in our list, it is removable.
+	 */
+	return found;
+}
+EXPORT_SYMBOL_GPL(efivar_variable_is_removable);
+
 static efi_status_t
 check_var_size(u32 attributes, unsigned long size)
 {
@@ -852,7 +918,7 @@ int efivar_entry_set_get_size(struct efi
 
 	*set = false;
 
-	if (efivar_validate(name, data, *size) == false)
+	if (efivar_validate(*vendor, name, data, *size) == false)
 		return -EINVAL;
 
 	/*
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/gpu/drm/drm_dp_mst_topology.c linux-libre-3.18.31-gnu/drivers/gpu/drm/drm_dp_mst_topology.c
--- linux-libre-3.18.30-gnu/drivers/gpu/drm/drm_dp_mst_topology.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/gpu/drm/drm_dp_mst_topology.c	2016-04-19 07:57:18.000000000 -0400
@@ -996,18 +996,27 @@ static bool drm_dp_port_setup_pdt(struct
 	return send_link;
 }
 
-static void drm_dp_check_port_guid(struct drm_dp_mst_branch *mstb,
-				   struct drm_dp_mst_port *port)
+static void drm_dp_check_mstb_guid(struct drm_dp_mst_branch *mstb, u8 *guid)
 {
 	int ret;
-	if (port->dpcd_rev >= 0x12) {
-		port->guid_valid = drm_dp_validate_guid(mstb->mgr, port->guid);
-		if (!port->guid_valid) {
-			ret = drm_dp_send_dpcd_write(mstb->mgr,
-						     port,
-						     DP_GUID,
-						     16, port->guid);
-			port->guid_valid = true;
+
+	memcpy(mstb->guid, guid, 16);
+
+	if (!drm_dp_validate_guid(mstb->mgr, mstb->guid)) {
+		if (mstb->port_parent) {
+			ret = drm_dp_send_dpcd_write(
+					mstb->mgr,
+					mstb->port_parent,
+					DP_GUID,
+					16,
+					mstb->guid);
+		} else {
+
+			ret = drm_dp_dpcd_write(
+					mstb->mgr->aux,
+					DP_GUID,
+					mstb->guid,
+					16);
 		}
 	}
 }
@@ -1064,7 +1073,6 @@ static void drm_dp_add_port(struct drm_d
 	port->dpcd_rev = port_msg->dpcd_revision;
 	port->num_sdp_streams = port_msg->num_sdp_streams;
 	port->num_sdp_stream_sinks = port_msg->num_sdp_stream_sinks;
-	memcpy(port->guid, port_msg->peer_guid, 16);
 
 	/* manage mstb port lists with mgr lock - take a reference
 	   for this list */
@@ -1077,11 +1085,9 @@ static void drm_dp_add_port(struct drm_d
 
 	if (old_ddps != port->ddps) {
 		if (port->ddps) {
-			drm_dp_check_port_guid(mstb, port);
 			if (!port->input)
 				drm_dp_send_enum_path_resources(mstb->mgr, mstb, port);
 		} else {
-			port->guid_valid = false;
 			port->available_pbn = 0;
 			}
 	}
@@ -1126,10 +1132,8 @@ static void drm_dp_update_port(struct dr
 
 	if (old_ddps != port->ddps) {
 		if (port->ddps) {
-			drm_dp_check_port_guid(mstb, port);
 			dowork = true;
 		} else {
-			port->guid_valid = false;
 			port->available_pbn = 0;
 		}
 	}
@@ -1185,13 +1189,14 @@ static struct drm_dp_mst_branch *get_mst
 	struct drm_dp_mst_branch *found_mstb;
 	struct drm_dp_mst_port *port;
 
+	if (memcmp(mstb->guid, guid, 16) == 0)
+		return mstb;
+
+
 	list_for_each_entry(port, &mstb->ports, next) {
 		if (!port->mstb)
 			continue;
 
-		if (port->guid_valid && memcmp(port->guid, guid, 16) == 0)
-			return port->mstb;
-
 		found_mstb = get_mst_branch_device_by_guid_helper(port->mstb, guid);
 
 		if (found_mstb)
@@ -1210,10 +1215,7 @@ static struct drm_dp_mst_branch *drm_dp_
 	/* find the port by iterating down */
 	mutex_lock(&mgr->lock);
 
-	if (mgr->guid_valid && memcmp(mgr->guid, guid, 16) == 0)
-		mstb = mgr->mst_primary;
-	else
-		mstb = get_mst_branch_device_by_guid_helper(mgr->mst_primary, guid);
+	mstb = get_mst_branch_device_by_guid_helper(mgr->mst_primary, guid);
 
 	if (mstb)
 		kref_get(&mstb->kref);
@@ -1525,6 +1527,9 @@ static int drm_dp_send_link_address(stru
 				       txmsg->reply.u.link_addr.ports[i].num_sdp_streams,
 				       txmsg->reply.u.link_addr.ports[i].num_sdp_stream_sinks);
 			}
+
+			drm_dp_check_mstb_guid(mstb, txmsg->reply.u.link_addr.guid);
+
 			for (i = 0; i < txmsg->reply.u.link_addr.nports; i++) {
 				drm_dp_add_port(mstb, mgr->dev, &txmsg->reply.u.link_addr.ports[i]);
 			}
@@ -1928,31 +1933,17 @@ int drm_dp_mst_topology_mgr_set_mst(stru
 		mgr->mst_primary = mstb;
 		kref_get(&mgr->mst_primary->kref);
 
-		{
-			struct drm_dp_payload reset_pay;
-			reset_pay.start_slot = 0;
-			reset_pay.num_slots = 0x3f;
-			drm_dp_dpcd_write_payload(mgr, 0, &reset_pay);
-		}
-
 		ret = drm_dp_dpcd_writeb(mgr->aux, DP_MSTM_CTRL,
-					 DP_MST_EN | DP_UP_REQ_EN | DP_UPSTREAM_IS_SRC);
+							 DP_MST_EN | DP_UP_REQ_EN | DP_UPSTREAM_IS_SRC);
 		if (ret < 0) {
 			goto out_unlock;
 		}
 
-
-		/* sort out guid */
-		ret = drm_dp_dpcd_read(mgr->aux, DP_GUID, mgr->guid, 16);
-		if (ret != 16) {
-			DRM_DEBUG_KMS("failed to read DP GUID %d\n", ret);
-			goto out_unlock;
-		}
-
-		mgr->guid_valid = drm_dp_validate_guid(mgr, mgr->guid);
-		if (!mgr->guid_valid) {
-			ret = drm_dp_dpcd_write(mgr->aux, DP_GUID, mgr->guid, 16);
-			mgr->guid_valid = true;
+		{
+			struct drm_dp_payload reset_pay;
+			reset_pay.start_slot = 0;
+			reset_pay.num_slots = 0x3f;
+			drm_dp_dpcd_write_payload(mgr, 0, &reset_pay);
 		}
 
 		queue_work(system_long_wq, &mgr->work);
@@ -2174,6 +2165,7 @@ static int drm_dp_mst_handle_up_req(stru
 			}
 
 			drm_dp_update_port(mstb, &msg.u.conn_stat);
+
 			DRM_DEBUG_KMS("Got CSN: pn: %d ldps:%d ddps: %d mcs: %d ip: %d pdt: %d\n", msg.u.conn_stat.port_number, msg.u.conn_stat.legacy_device_plug_status, msg.u.conn_stat.displayport_device_plug_status, msg.u.conn_stat.message_capability_status, msg.u.conn_stat.input_port, msg.u.conn_stat.peer_device_type);
 			(*mgr->cbs->hotplug)(mgr);
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/gpu/drm/gma500/gem.c linux-libre-3.18.31-gnu/drivers/gpu/drm/gma500/gem.c
--- linux-libre-3.18.30-gnu/drivers/gpu/drm/gma500/gem.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/gpu/drm/gma500/gem.c	2016-04-19 07:57:18.000000000 -0400
@@ -130,7 +130,7 @@ int psb_gem_create(struct drm_file *file
 		return ret;
 	}
 	/* We have the initial and handle reference but need only one now */
-	drm_gem_object_unreference(&r->gem);
+	drm_gem_object_unreference_unlocked(&r->gem);
 	*handlep = handle;
 	return 0;
 }
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/gpu/drm/radeon/atombios_encoders.c linux-libre-3.18.31-gnu/drivers/gpu/drm/radeon/atombios_encoders.c
--- linux-libre-3.18.30-gnu/drivers/gpu/drm/radeon/atombios_encoders.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/gpu/drm/radeon/atombios_encoders.c	2016-04-19 07:57:18.000000000 -0400
@@ -872,8 +872,6 @@ atombios_dig_encoder_setup(struct drm_en
 			else
 				args.v1.ucLaneNum = 4;
 
-			if (ENCODER_MODE_IS_DP(args.v1.ucEncoderMode) && (dp_clock == 270000))
-				args.v1.ucConfig |= ATOM_ENCODER_CONFIG_DPLINKRATE_2_70GHZ;
 			switch (radeon_encoder->encoder_id) {
 			case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
 				args.v1.ucConfig = ATOM_ENCODER_CONFIG_V2_TRANSMITTER1;
@@ -890,6 +888,10 @@ atombios_dig_encoder_setup(struct drm_en
 				args.v1.ucConfig |= ATOM_ENCODER_CONFIG_LINKB;
 			else
 				args.v1.ucConfig |= ATOM_ENCODER_CONFIG_LINKA;
+
+			if (ENCODER_MODE_IS_DP(args.v1.ucEncoderMode) && (dp_clock == 270000))
+				args.v1.ucConfig |= ATOM_ENCODER_CONFIG_DPLINKRATE_2_70GHZ;
+
 			break;
 		case 2:
 		case 3:
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/gpu/drm/radeon/radeon_atpx_handler.c linux-libre-3.18.31-gnu/drivers/gpu/drm/radeon/radeon_atpx_handler.c
--- linux-libre-3.18.30-gnu/drivers/gpu/drm/radeon/radeon_atpx_handler.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/gpu/drm/radeon/radeon_atpx_handler.c	2016-04-19 07:57:18.000000000 -0400
@@ -62,6 +62,10 @@ bool radeon_has_atpx(void) {
 	return radeon_atpx_priv.atpx_detected;
 }
 
+bool radeon_has_atpx_dgpu_power_cntl(void) {
+	return radeon_atpx_priv.atpx.functions.power_cntl;
+}
+
 /**
  * radeon_atpx_call - call an ATPX method
  *
@@ -141,10 +145,6 @@ static void radeon_atpx_parse_functions(
  */
 static int radeon_atpx_validate(struct radeon_atpx *atpx)
 {
-	/* make sure required functions are enabled */
-	/* dGPU power control is required */
-	atpx->functions.power_cntl = true;
-
 	if (atpx->functions.px_params) {
 		union acpi_object *info;
 		struct atpx_px_params output;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/gpu/drm/radeon/radeon_device.c linux-libre-3.18.31-gnu/drivers/gpu/drm/radeon/radeon_device.c
--- linux-libre-3.18.30-gnu/drivers/gpu/drm/radeon/radeon_device.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/gpu/drm/radeon/radeon_device.c	2016-04-19 07:57:18.000000000 -0400
@@ -103,6 +103,12 @@ static const char radeon_family_name[][1
 	"LAST",
 };
 
+#if defined(CONFIG_VGA_SWITCHEROO)
+bool radeon_has_atpx_dgpu_power_cntl(void);
+#else
+static inline bool radeon_has_atpx_dgpu_power_cntl(void) { return false; }
+#endif
+
 #define RADEON_PX_QUIRK_DISABLE_PX  (1 << 0)
 #define RADEON_PX_QUIRK_LONG_WAKEUP (1 << 1)
 
@@ -1395,7 +1401,7 @@ int radeon_device_init(struct radeon_dev
 	 * ignore it */
 	vga_client_register(rdev->pdev, rdev, NULL, radeon_vga_set_decode);
 
-	if (rdev->flags & RADEON_IS_PX)
+	if ((rdev->flags & RADEON_IS_PX) && radeon_has_atpx_dgpu_power_cntl())
 		runtime = true;
 	vga_switcheroo_register_client(rdev->pdev, &radeon_switcheroo_ops, runtime);
 	if (runtime)
@@ -1665,7 +1671,6 @@ int radeon_resume_kms(struct drm_device
 	}
 
 	drm_kms_helper_poll_enable(dev);
-	drm_helper_hpd_irq_event(dev);
 
 	/* set the power state here in case we are a PX system or headless */
 	if ((rdev->pm.pm_method == PM_METHOD_DPM) && rdev->pm.dpm_enabled)
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/gpu/drm/radeon/radeon_fb.c linux-libre-3.18.31-gnu/drivers/gpu/drm/radeon/radeon_fb.c
--- linux-libre-3.18.30-gnu/drivers/gpu/drm/radeon/radeon_fb.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/gpu/drm/radeon/radeon_fb.c	2016-04-19 07:57:18.000000000 -0400
@@ -303,7 +303,8 @@ out_unref:
 
 void radeon_fb_output_poll_changed(struct radeon_device *rdev)
 {
-	drm_fb_helper_hotplug_event(&rdev->mode_info.rfbdev->helper);
+	if (rdev->mode_info.rfbdev)
+		drm_fb_helper_hotplug_event(&rdev->mode_info.rfbdev->helper);
 }
 
 static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
@@ -343,6 +344,10 @@ int radeon_fbdev_init(struct radeon_devi
 	int bpp_sel = 32;
 	int ret;
 
+	/* don't enable fbdev if no connectors */
+	if (list_empty(&rdev->ddev->mode_config.connector_list))
+		return 0;
+
 	/* select 8 bpp console on RN50 or 16MB cards */
 	if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32*1024*1024))
 		bpp_sel = 8;
@@ -386,7 +391,8 @@ void radeon_fbdev_fini(struct radeon_dev
 
 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
 {
-	fb_set_suspend(rdev->mode_info.rfbdev->helper.fbdev, state);
+	if (rdev->mode_info.rfbdev)
+		fb_set_suspend(rdev->mode_info.rfbdev->helper.fbdev, state);
 }
 
 int radeon_fbdev_total_size(struct radeon_device *rdev)
@@ -401,7 +407,22 @@ int radeon_fbdev_total_size(struct radeo
 
 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
 {
+	if (!rdev->mode_info.rfbdev)
+		return false;
+
 	if (robj == gem_to_radeon_bo(rdev->mode_info.rfbdev->rfb.obj))
 		return true;
 	return false;
 }
+
+void radeon_fb_add_connector(struct radeon_device *rdev, struct drm_connector *connector)
+{
+	if (rdev->mode_info.rfbdev)
+		drm_fb_helper_add_one_connector(&rdev->mode_info.rfbdev->helper, connector);
+}
+
+void radeon_fb_remove_connector(struct radeon_device *rdev, struct drm_connector *connector)
+{
+	if (rdev->mode_info.rfbdev)
+		drm_fb_helper_remove_one_connector(&rdev->mode_info.rfbdev->helper, connector);
+}
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/gpu/drm/radeon/radeon_mode.h linux-libre-3.18.31-gnu/drivers/gpu/drm/radeon/radeon_mode.h
--- linux-libre-3.18.30-gnu/drivers/gpu/drm/radeon/radeon_mode.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/gpu/drm/radeon/radeon_mode.h	2016-04-19 07:57:18.000000000 -0400
@@ -921,6 +921,10 @@ bool radeon_fbdev_robj_is_fb(struct rade
 void radeon_fb_output_poll_changed(struct radeon_device *rdev);
 
 void radeon_crtc_handle_vblank(struct radeon_device *rdev, int crtc_id);
+
+void radeon_fb_add_connector(struct radeon_device *rdev, struct drm_connector *connector);
+void radeon_fb_remove_connector(struct radeon_device *rdev, struct drm_connector *connector);
+
 void radeon_crtc_handle_flip(struct radeon_device *rdev, int crtc_id);
 
 int radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bool tiled);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/hid/hid-core.c linux-libre-3.18.31-gnu/drivers/hid/hid-core.c
--- linux-libre-3.18.30-gnu/drivers/hid/hid-core.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/hid/hid-core.c	2016-04-19 07:57:18.000000000 -0400
@@ -2553,8 +2553,10 @@ int hid_add_device(struct hid_device *hd
 	/*
 	 * Scan generic devices for group information
 	 */
-	if (hid_ignore_special_drivers ||
-	    !hid_match_id(hdev, hid_have_special_driver)) {
+	if (hid_ignore_special_drivers) {
+		hdev->group = HID_GROUP_GENERIC;
+	} else if (!hdev->group &&
+		   !hid_match_id(hdev, hid_have_special_driver)) {
 		ret = hid_scan_report(hdev);
 		if (ret)
 			hid_warn(hdev, "bad device descriptor (%d)\n", ret);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/hid/hid-multitouch.c linux-libre-3.18.31-gnu/drivers/hid/hid-multitouch.c
--- linux-libre-3.18.30-gnu/drivers/hid/hid-multitouch.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/hid/hid-multitouch.c	2016-04-19 07:57:18.000000000 -0400
@@ -312,8 +312,19 @@ static void mt_feature_mapping(struct hi
 			break;
 		}
 
-		td->inputmode = field->report->id;
-		td->inputmode_index = usage->usage_index;
+		if (td->inputmode < 0) {
+			td->inputmode = field->report->id;
+			td->inputmode_index = usage->usage_index;
+		} else {
+			/*
+			 * Some elan panels wrongly declare 2 input mode
+			 * features, and silently ignore when we set the
+			 * value in the second field. Skip the second feature
+			 * and hope for the best.
+			 */
+			dev_info(&hdev->dev,
+				 "Ignoring the extra HID_DG_INPUTMODE\n");
+		}
 
 		break;
 	case HID_DG_CONTACTMAX:
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/hid/i2c-hid/i2c-hid.c linux-libre-3.18.31-gnu/drivers/hid/i2c-hid/i2c-hid.c
--- linux-libre-3.18.30-gnu/drivers/hid/i2c-hid/i2c-hid.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/hid/i2c-hid/i2c-hid.c	2016-04-19 07:57:18.000000000 -0400
@@ -277,17 +277,21 @@ static int i2c_hid_set_or_send_report(st
 	u16 dataRegister = le16_to_cpu(ihid->hdesc.wDataRegister);
 	u16 outputRegister = le16_to_cpu(ihid->hdesc.wOutputRegister);
 	u16 maxOutputLength = le16_to_cpu(ihid->hdesc.wMaxOutputLength);
+	u16 size;
+	int args_len;
+	int index = 0;
 
-	/* hid_hw_* already checked that data_len < HID_MAX_BUFFER_SIZE */
-	u16 size =	2			/* size */ +
+	i2c_hid_dbg(ihid, "%s\n", __func__);
+
+	if (data_len > ihid->bufsize)
+		return -EINVAL;
+
+	size =		2			/* size */ +
 			(reportID ? 1 : 0)	/* reportID */ +
 			data_len		/* buf */;
-	int args_len =	(reportID >= 0x0F ? 1 : 0) /* optional third byte */ +
+	args_len =	(reportID >= 0x0F ? 1 : 0) /* optional third byte */ +
 			2			/* dataRegister */ +
 			size			/* args */;
-	int index = 0;
-
-	i2c_hid_dbg(ihid, "%s\n", __func__);
 
 	if (!use_data && maxOutputLength == 0)
 		return -ENOSYS;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/iio/dac/mcp4725.c linux-libre-3.18.31-gnu/drivers/iio/dac/mcp4725.c
--- linux-libre-3.18.30-gnu/drivers/iio/dac/mcp4725.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/iio/dac/mcp4725.c	2016-04-19 07:57:18.000000000 -0400
@@ -300,6 +300,7 @@ static int mcp4725_probe(struct i2c_clie
 	data->client = client;
 
 	indio_dev->dev.parent = &client->dev;
+	indio_dev->name = id->name;
 	indio_dev->info = &mcp4725_info;
 	indio_dev->channels = &mcp4725_channel;
 	indio_dev->num_channels = 1;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/iio/imu/adis_buffer.c linux-libre-3.18.31-gnu/drivers/iio/imu/adis_buffer.c
--- linux-libre-3.18.30-gnu/drivers/iio/imu/adis_buffer.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/iio/imu/adis_buffer.c	2016-04-19 07:57:18.000000000 -0400
@@ -43,7 +43,7 @@ int adis_update_scan_mode(struct iio_dev
 		return -ENOMEM;
 
 	rx = adis->buffer;
-	tx = rx + indio_dev->scan_bytes;
+	tx = rx + scan_count;
 
 	spi_message_init(&adis->msg);
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/iio/pressure/mpl115.c linux-libre-3.18.31-gnu/drivers/iio/pressure/mpl115.c
--- linux-libre-3.18.30-gnu/drivers/iio/pressure/mpl115.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/iio/pressure/mpl115.c	2016-04-19 07:57:18.000000000 -0400
@@ -117,7 +117,7 @@ static int mpl115_read_raw(struct iio_de
 		*val = ret >> 6;
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_OFFSET:
-		*val = 605;
+		*val = -605;
 		*val2 = 750000;
 		return IIO_VAL_INT_PLUS_MICRO;
 	case IIO_CHAN_INFO_SCALE:
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/infiniband/hw/cxgb3/iwch_cm.c linux-libre-3.18.31-gnu/drivers/infiniband/hw/cxgb3/iwch_cm.c
--- linux-libre-3.18.30-gnu/drivers/infiniband/hw/cxgb3/iwch_cm.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/infiniband/hw/cxgb3/iwch_cm.c	2016-04-19 07:57:18.000000000 -0400
@@ -149,7 +149,7 @@ static int iwch_l2t_send(struct t3cdev *
 	error = l2t_send(tdev, skb, l2e);
 	if (error < 0)
 		kfree_skb(skb);
-	return error;
+	return error < 0 ? error : 0;
 }
 
 int iwch_cxgb3_ofld_send(struct t3cdev *tdev, struct sk_buff *skb)
@@ -165,7 +165,7 @@ int iwch_cxgb3_ofld_send(struct t3cdev *
 	error = cxgb3_ofld_send(tdev, skb);
 	if (error < 0)
 		kfree_skb(skb);
-	return error;
+	return error < 0 ? error : 0;
 }
 
 static void release_tid(struct t3cdev *tdev, u32 hwtid, struct sk_buff *skb)
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/infiniband/ulp/srpt/ib_srpt.c linux-libre-3.18.31-gnu/drivers/infiniband/ulp/srpt/ib_srpt.c
--- linux-libre-3.18.30-gnu/drivers/infiniband/ulp/srpt/ib_srpt.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/infiniband/ulp/srpt/ib_srpt.c	2016-04-19 07:57:18.000000000 -0400
@@ -1745,47 +1745,6 @@ send_sense:
 	return -1;
 }
 
-/**
- * srpt_rx_mgmt_fn_tag() - Process a task management function by tag.
- * @ch: RDMA channel of the task management request.
- * @fn: Task management function to perform.
- * @req_tag: Tag of the SRP task management request.
- * @mgmt_ioctx: I/O context of the task management request.
- *
- * Returns zero if the target core will process the task management
- * request asynchronously.
- *
- * Note: It is assumed that the initiator serializes tag-based task management
- * requests.
- */
-static int srpt_rx_mgmt_fn_tag(struct srpt_send_ioctx *ioctx, u64 tag)
-{
-	struct srpt_device *sdev;
-	struct srpt_rdma_ch *ch;
-	struct srpt_send_ioctx *target;
-	int ret, i;
-
-	ret = -EINVAL;
-	ch = ioctx->ch;
-	BUG_ON(!ch);
-	BUG_ON(!ch->sport);
-	sdev = ch->sport->sdev;
-	BUG_ON(!sdev);
-	spin_lock_irq(&sdev->spinlock);
-	for (i = 0; i < ch->rq_size; ++i) {
-		target = ch->ioctx_ring[i];
-		if (target->cmd.se_lun == ioctx->cmd.se_lun &&
-		    target->tag == tag &&
-		    srpt_get_cmd_state(target) != SRPT_STATE_DONE) {
-			ret = 0;
-			/* now let the target core abort &target->cmd; */
-			break;
-		}
-	}
-	spin_unlock_irq(&sdev->spinlock);
-	return ret;
-}
-
 static int srp_tmr_to_tcm(int fn)
 {
 	switch (fn) {
@@ -1820,7 +1779,6 @@ static void srpt_handle_tsk_mgmt(struct
 	struct se_cmd *cmd;
 	struct se_session *sess = ch->sess;
 	uint64_t unpacked_lun;
-	uint32_t tag = 0;
 	int tcm_tmr;
 	int rc;
 
@@ -1836,25 +1794,10 @@ static void srpt_handle_tsk_mgmt(struct
 	srpt_set_cmd_state(send_ioctx, SRPT_STATE_MGMT);
 	send_ioctx->tag = srp_tsk->tag;
 	tcm_tmr = srp_tmr_to_tcm(srp_tsk->tsk_mgmt_func);
-	if (tcm_tmr < 0) {
-		send_ioctx->cmd.se_tmr_req->response =
-			TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED;
-		goto fail;
-	}
 	unpacked_lun = srpt_unpack_lun((uint8_t *)&srp_tsk->lun,
 				       sizeof(srp_tsk->lun));
-
-	if (srp_tsk->tsk_mgmt_func == SRP_TSK_ABORT_TASK) {
-		rc = srpt_rx_mgmt_fn_tag(send_ioctx, srp_tsk->task_tag);
-		if (rc < 0) {
-			send_ioctx->cmd.se_tmr_req->response =
-					TMR_TASK_DOES_NOT_EXIST;
-			goto fail;
-		}
-		tag = srp_tsk->task_tag;
-	}
 	rc = target_submit_tmr(&send_ioctx->cmd, sess, NULL, unpacked_lun,
-				srp_tsk, tcm_tmr, GFP_KERNEL, tag,
+				srp_tsk, tcm_tmr, GFP_KERNEL, srp_tsk->task_tag,
 				TARGET_SCF_ACK_KREF);
 	if (rc != 0) {
 		send_ioctx->cmd.se_tmr_req->response = TMR_FUNCTION_REJECTED;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/input/misc/ati_remote2.c linux-libre-3.18.31-gnu/drivers/input/misc/ati_remote2.c
--- linux-libre-3.18.30-gnu/drivers/input/misc/ati_remote2.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/input/misc/ati_remote2.c	2016-04-19 07:57:18.000000000 -0400
@@ -817,26 +817,49 @@ static int ati_remote2_probe(struct usb_
 
 	ar2->udev = udev;
 
+	/* Sanity check, first interface must have an endpoint */
+	if (alt->desc.bNumEndpoints < 1 || !alt->endpoint) {
+		dev_err(&interface->dev,
+			"%s(): interface 0 must have an endpoint\n", __func__);
+		r = -ENODEV;
+		goto fail1;
+	}
 	ar2->intf[0] = interface;
 	ar2->ep[0] = &alt->endpoint[0].desc;
 
+	/* Sanity check, the device must have two interfaces */
 	ar2->intf[1] = usb_ifnum_to_if(udev, 1);
+	if ((udev->actconfig->desc.bNumInterfaces < 2) || !ar2->intf[1]) {
+		dev_err(&interface->dev, "%s(): need 2 interfaces, found %d\n",
+			__func__, udev->actconfig->desc.bNumInterfaces);
+		r = -ENODEV;
+		goto fail1;
+	}
+
 	r = usb_driver_claim_interface(&ati_remote2_driver, ar2->intf[1], ar2);
 	if (r)
 		goto fail1;
+
+	/* Sanity check, second interface must have an endpoint */
 	alt = ar2->intf[1]->cur_altsetting;
+	if (alt->desc.bNumEndpoints < 1 || !alt->endpoint) {
+		dev_err(&interface->dev,
+			"%s(): interface 1 must have an endpoint\n", __func__);
+		r = -ENODEV;
+		goto fail2;
+	}
 	ar2->ep[1] = &alt->endpoint[0].desc;
 
 	r = ati_remote2_urb_init(ar2);
 	if (r)
-		goto fail2;
+		goto fail3;
 
 	ar2->channel_mask = channel_mask;
 	ar2->mode_mask = mode_mask;
 
 	r = ati_remote2_setup(ar2, ar2->channel_mask);
 	if (r)
-		goto fail2;
+		goto fail3;
 
 	usb_make_path(udev, ar2->phys, sizeof(ar2->phys));
 	strlcat(ar2->phys, "/input0", sizeof(ar2->phys));
@@ -845,11 +868,11 @@ static int ati_remote2_probe(struct usb_
 
 	r = sysfs_create_group(&udev->dev.kobj, &ati_remote2_attr_group);
 	if (r)
-		goto fail2;
+		goto fail3;
 
 	r = ati_remote2_input_init(ar2);
 	if (r)
-		goto fail3;
+		goto fail4;
 
 	usb_set_intfdata(interface, ar2);
 
@@ -857,10 +880,11 @@ static int ati_remote2_probe(struct usb_
 
 	return 0;
 
- fail3:
+ fail4:
 	sysfs_remove_group(&udev->dev.kobj, &ati_remote2_attr_group);
- fail2:
+ fail3:
 	ati_remote2_urb_cleanup(ar2);
+ fail2:
 	usb_driver_release_interface(&ati_remote2_driver, ar2->intf[1]);
  fail1:
 	kfree(ar2);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/input/misc/ims-pcu.c linux-libre-3.18.31-gnu/drivers/input/misc/ims-pcu.c
--- linux-libre-3.18.30-gnu/drivers/input/misc/ims-pcu.c	2016-04-07 00:11:32.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/input/misc/ims-pcu.c	2016-04-21 11:58:07.000000000 -0400
@@ -1663,6 +1663,8 @@ static int ims_pcu_parse_cdc_data(struct
 
 	pcu->ctrl_intf = usb_ifnum_to_if(pcu->udev,
 					 union_desc->bMasterInterface0);
+	if (!pcu->ctrl_intf)
+		return -EINVAL;
 
 	alt = pcu->ctrl_intf->cur_altsetting;
 	pcu->ep_ctrl = &alt->endpoint[0].desc;
@@ -1670,6 +1672,8 @@ static int ims_pcu_parse_cdc_data(struct
 
 	pcu->data_intf = usb_ifnum_to_if(pcu->udev,
 					 union_desc->bSlaveInterface0);
+	if (!pcu->data_intf)
+		return -EINVAL;
 
 	alt = pcu->data_intf->cur_altsetting;
 	if (alt->desc.bNumEndpoints != 2) {
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/input/misc/powermate.c linux-libre-3.18.31-gnu/drivers/input/misc/powermate.c
--- linux-libre-3.18.30-gnu/drivers/input/misc/powermate.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/input/misc/powermate.c	2016-04-19 07:57:18.000000000 -0400
@@ -307,6 +307,9 @@ static int powermate_probe(struct usb_in
 	int error = -ENOMEM;
 
 	interface = intf->cur_altsetting;
+	if (interface->desc.bNumEndpoints < 1)
+		return -EINVAL;
+
 	endpoint = &interface->endpoint[0].desc;
 	if (!usb_endpoint_is_int_in(endpoint))
 		return -EIO;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/input/mouse/synaptics.c linux-libre-3.18.31-gnu/drivers/input/mouse/synaptics.c
--- linux-libre-3.18.30-gnu/drivers/input/mouse/synaptics.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/input/mouse/synaptics.c	2016-04-19 07:57:18.000000000 -0400
@@ -840,8 +840,9 @@ static void synaptics_report_ext_buttons
 	if (!SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap))
 		return;
 
-	/* Bug in FW 8.1, buttons are reported only when ExtBit is 1 */
-	if (SYN_ID_FULL(priv->identity) == 0x801 &&
+	/* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
+	if ((SYN_ID_FULL(priv->identity) == 0x801 ||
+	     SYN_ID_FULL(priv->identity) == 0x802) &&
 	    !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
 		return;
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/irqchip/irq-omap-intc.c linux-libre-3.18.31-gnu/drivers/irqchip/irq-omap-intc.c
--- linux-libre-3.18.30-gnu/drivers/irqchip/irq-omap-intc.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/irqchip/irq-omap-intc.c	2016-04-19 07:57:18.000000000 -0400
@@ -48,6 +48,7 @@
 #define INTC_ILR0		0x0100
 
 #define ACTIVEIRQ_MASK		0x7f	/* omap2/3 active interrupt bits */
+#define SPURIOUSIRQ_MASK	(0x1ffffff << 7)
 #define INTCPS_NR_ILR_REGS	128
 #define INTCPS_NR_MIR_REGS	4
 
@@ -331,37 +332,36 @@ static int __init omap_init_irq(u32 base
 static asmlinkage void __exception_irq_entry
 omap_intc_handle_irq(struct pt_regs *regs)
 {
-	u32 irqnr = 0;
-	int handled_irq = 0;
-	int i;
-
-	do {
-		for (i = 0; i < omap_nr_pending; i++) {
-			irqnr = intc_readl(INTC_PENDING_IRQ0 + (0x20 * i));
-			if (irqnr)
-				goto out;
-		}
-
-out:
-		if (!irqnr)
-			break;
-
-		irqnr = intc_readl(INTC_SIR);
-		irqnr &= ACTIVEIRQ_MASK;
+	extern unsigned long irq_err_count;
+	u32 irqnr;
 
-		if (irqnr) {
-			handle_domain_irq(domain, irqnr, regs);
-			handled_irq = 1;
-		}
-	} while (irqnr);
+	irqnr = intc_readl(INTC_SIR);
 
 	/*
-	 * If an irq is masked or deasserted while active, we will
-	 * keep ending up here with no irq handled. So remove it from
-	 * the INTC with an ack.
+	 * A spurious IRQ can result if interrupt that triggered the
+	 * sorting is no longer active during the sorting (10 INTC
+	 * functional clock cycles after interrupt assertion). Or a
+	 * change in interrupt mask affected the result during sorting
+	 * time. There is no special handling required except ignoring
+	 * the SIR register value just read and retrying.
+	 * See section 6.2.5 of AM335x TRM Literature Number: SPRUH73K
+	 *
+	 * Many a times, a spurious interrupt situation has been fixed
+	 * by adding a flush for the posted write acking the IRQ in
+	 * the device driver. Typically, this is going be the device
+	 * driver whose interrupt was handled just before the spurious
+	 * IRQ occurred. Pay attention to those device drivers if you
+	 * run into hitting the spurious IRQ condition below.
 	 */
-	if (!handled_irq)
+	if (unlikely((irqnr & SPURIOUSIRQ_MASK) == SPURIOUSIRQ_MASK)) {
+		pr_err_once("%s: spurious irq!\n", __func__);
+		irq_err_count++;
 		omap_ack_irq(NULL);
+		return;
+	}
+
+	irqnr &= ACTIVEIRQ_MASK;
+	handle_domain_irq(domain, irqnr, regs);
 }
 
 void __init omap2_init_irq(void)
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/md/bcache/super.c linux-libre-3.18.31-gnu/drivers/md/bcache/super.c
--- linux-libre-3.18.30-gnu/drivers/md/bcache/super.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/md/bcache/super.c	2016-04-19 07:57:18.000000000 -0400
@@ -1046,8 +1046,12 @@ int bch_cached_dev_attach(struct cached_
 	 */
 	atomic_set(&dc->count, 1);
 
-	if (bch_cached_dev_writeback_start(dc))
+	/* Block writeback thread, but spawn it */
+	down_write(&dc->writeback_lock);
+	if (bch_cached_dev_writeback_start(dc)) {
+		up_write(&dc->writeback_lock);
 		return -ENOMEM;
+	}
 
 	if (BDEV_STATE(&dc->sb) == BDEV_STATE_DIRTY) {
 		bch_sectors_dirty_init(dc);
@@ -1059,6 +1063,9 @@ int bch_cached_dev_attach(struct cached_
 	bch_cached_dev_run(dc);
 	bcache_device_link(&dc->disk, c, "bdev");
 
+	/* Allow the writeback thread to proceed */
+	up_write(&dc->writeback_lock);
+
 	pr_info("Caching %s as %s on set %pU",
 		bdevname(dc->bdev, buf), dc->disk.disk->disk_name,
 		dc->disk.c->sb.set_uuid);
@@ -1397,6 +1404,9 @@ static void cache_set_flush(struct closu
 	struct btree *b;
 	unsigned i;
 
+	if (!c)
+		closure_return(cl);
+
 	bch_cache_accounting_destroy(&c->accounting);
 
 	kobject_put(&c->internal);
@@ -1862,11 +1872,12 @@ static int cache_alloc(struct cache_sb *
 	return 0;
 }
 
-static void register_cache(struct cache_sb *sb, struct page *sb_page,
+static int register_cache(struct cache_sb *sb, struct page *sb_page,
 				struct block_device *bdev, struct cache *ca)
 {
 	char name[BDEVNAME_SIZE];
-	const char *err = "cannot allocate memory";
+	const char *err = NULL;
+	int ret = 0;
 
 	memcpy(&ca->sb, sb, sizeof(struct cache_sb));
 	ca->bdev = bdev;
@@ -1881,27 +1892,35 @@ static void register_cache(struct cache_
 	if (blk_queue_discard(bdev_get_queue(ca->bdev)))
 		ca->discard = CACHE_DISCARD(&ca->sb);
 
-	if (cache_alloc(sb, ca) != 0)
+	ret = cache_alloc(sb, ca);
+	if (ret != 0)
 		goto err;
 
-	err = "error creating kobject";
-	if (kobject_add(&ca->kobj, &part_to_dev(bdev->bd_part)->kobj, "bcache"))
-		goto err;
+	if (kobject_add(&ca->kobj, &part_to_dev(bdev->bd_part)->kobj, "bcache")) {
+		err = "error calling kobject_add";
+		ret = -ENOMEM;
+		goto out;
+	}
 
 	mutex_lock(&bch_register_lock);
 	err = register_cache_set(ca);
 	mutex_unlock(&bch_register_lock);
 
-	if (err)
-		goto err;
+	if (err) {
+		ret = -ENODEV;
+		goto out;
+	}
 
 	pr_info("registered cache device %s", bdevname(bdev, name));
+
 out:
 	kobject_put(&ca->kobj);
-	return;
+
 err:
-	pr_notice("error opening %s: %s", bdevname(bdev, name), err);
-	goto out;
+	if (err)
+		pr_notice("error opening %s: %s", bdevname(bdev, name), err);
+
+	return ret;
 }
 
 /* Global interfaces/init */
@@ -1999,7 +2018,8 @@ static ssize_t register_bcache(struct ko
 		if (!ca)
 			goto err_close;
 
-		register_cache(sb, sb_page, bdev, ca);
+		if (register_cache(sb, sb_page, bdev, ca) != 0)
+			goto err_close;
 	}
 out:
 	if (sb_page)
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/md/multipath.c linux-libre-3.18.31-gnu/drivers/md/multipath.c
--- linux-libre-3.18.30-gnu/drivers/md/multipath.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/md/multipath.c	2016-04-19 07:57:18.000000000 -0400
@@ -129,7 +129,9 @@ static void multipath_make_request(struc
 	}
 	multipath = conf->multipaths + mp_bh->path;
 
-	mp_bh->bio = *bio;
+	bio_init(&mp_bh->bio);
+	__bio_clone_fast(&mp_bh->bio, bio);
+
 	mp_bh->bio.bi_iter.bi_sector += multipath->rdev->data_offset;
 	mp_bh->bio.bi_bdev = multipath->rdev->bdev;
 	mp_bh->bio.bi_rw |= REQ_FAILFAST_TRANSPORT;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/md/raid5.c linux-libre-3.18.31-gnu/drivers/md/raid5.c
--- linux-libre-3.18.30-gnu/drivers/md/raid5.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/md/raid5.c	2016-04-19 07:57:18.000000000 -0400
@@ -6245,8 +6245,8 @@ static int run(struct mddev *mddev)
 		}
 
 		if (discard_supported &&
-		   mddev->queue->limits.max_discard_sectors >= stripe &&
-		   mddev->queue->limits.discard_granularity >= stripe)
+		    mddev->queue->limits.max_discard_sectors >= (stripe >> 9) &&
+		    mddev->queue->limits.discard_granularity >= stripe)
 			queue_flag_set_unlocked(QUEUE_FLAG_DISCARD,
 						mddev->queue);
 		else
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/media/i2c/adv7511.c linux-libre-3.18.31-gnu/drivers/media/i2c/adv7511.c
--- linux-libre-3.18.30-gnu/drivers/media/i2c/adv7511.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/media/i2c/adv7511.c	2016-04-19 07:57:18.000000000 -0400
@@ -833,12 +833,23 @@ static void adv7511_dbg_dump_edid(int lv
 	}
 }
 
+static void adv7511_notify_no_edid(struct v4l2_subdev *sd)
+{
+	struct adv7511_state *state = get_adv7511_state(sd);
+	struct adv7511_edid_detect ed;
+
+	/* We failed to read the EDID, so send an event for this. */
+	ed.present = false;
+	ed.segment = adv7511_rd(sd, 0xc4);
+	v4l2_subdev_notify(sd, ADV7511_EDID_DETECT, (void *)&ed);
+	v4l2_ctrl_s_ctrl(state->have_edid0_ctrl, 0x0);
+}
+
 static void adv7511_edid_handler(struct work_struct *work)
 {
 	struct delayed_work *dwork = to_delayed_work(work);
 	struct adv7511_state *state = container_of(dwork, struct adv7511_state, edid_handler);
 	struct v4l2_subdev *sd = &state->sd;
-	struct adv7511_edid_detect ed;
 
 	v4l2_dbg(1, debug, sd, "%s:\n", __func__);
 
@@ -863,9 +874,7 @@ static void adv7511_edid_handler(struct
 	}
 
 	/* We failed to read the EDID, so send an event for this. */
-	ed.present = false;
-	ed.segment = adv7511_rd(sd, 0xc4);
-	v4l2_subdev_notify(sd, ADV7511_EDID_DETECT, (void *)&ed);
+	adv7511_notify_no_edid(sd);
 	v4l2_dbg(1, debug, sd, "%s: no edid found\n", __func__);
 }
 
@@ -936,7 +945,6 @@ static void adv7511_check_monitor_presen
 	/* update read only ctrls */
 	v4l2_ctrl_s_ctrl(state->hotplug_ctrl, adv7511_have_hotplug(sd) ? 0x1 : 0x0);
 	v4l2_ctrl_s_ctrl(state->rx_sense_ctrl, adv7511_have_rx_sense(sd) ? 0x1 : 0x0);
-	v4l2_ctrl_s_ctrl(state->have_edid0_ctrl, state->edid.segments ? 0x1 : 0x0);
 
 	if ((status & MASK_ADV7511_HPD_DETECT) && ((status & MASK_ADV7511_MSEN_DETECT) || state->edid.segments)) {
 		v4l2_dbg(1, debug, sd, "%s: hotplug and (rx-sense or edid)\n", __func__);
@@ -966,6 +974,7 @@ static void adv7511_check_monitor_presen
 		}
 		adv7511_s_power(sd, false);
 		memset(&state->edid, 0, sizeof(struct adv7511_state_edid));
+		adv7511_notify_no_edid(sd);
 	}
 }
 
@@ -1042,6 +1051,7 @@ static bool adv7511_check_edid_status(st
 		}
 		/* one more segment read ok */
 		state->edid.segments = segment + 1;
+		v4l2_ctrl_s_ctrl(state->have_edid0_ctrl, 0x1);
 		if (((state->edid.data[0x7e] >> 1) + 1) > state->edid.segments) {
 			/* Request next EDID segment */
 			v4l2_dbg(1, debug, sd, "%s: request segment %d\n", __func__, state->edid.segments);
@@ -1061,7 +1071,6 @@ static bool adv7511_check_edid_status(st
 		ed.present = true;
 		ed.segment = 0;
 		state->edid_detect_counter++;
-		v4l2_ctrl_s_ctrl(state->have_edid0_ctrl, state->edid.segments ? 0x1 : 0x0);
 		v4l2_subdev_notify(sd, ADV7511_EDID_DETECT, (void *)&ed);
 		return ed.present;
 	}
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/media/pci/bt8xx/bttv-driver.c linux-libre-3.18.31-gnu/drivers/media/pci/bt8xx/bttv-driver.c
--- linux-libre-3.18.30-gnu/drivers/media/pci/bt8xx/bttv-driver.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/media/pci/bt8xx/bttv-driver.c	2016-04-19 07:57:18.000000000 -0400
@@ -2332,6 +2332,19 @@ static int bttv_g_fmt_vid_overlay(struct
 	return 0;
 }
 
+static void bttv_get_width_mask_vid_cap(const struct bttv_format *fmt,
+					unsigned int *width_mask,
+					unsigned int *width_bias)
+{
+	if (fmt->flags & FORMAT_FLAGS_PLANAR) {
+		*width_mask = ~15; /* width must be a multiple of 16 pixels */
+		*width_bias = 8;   /* nearest */
+	} else {
+		*width_mask = ~3; /* width must be a multiple of 4 pixels */
+		*width_bias = 2;  /* nearest */
+	}
+}
+
 static int bttv_try_fmt_vid_cap(struct file *file, void *priv,
 						struct v4l2_format *f)
 {
@@ -2341,6 +2354,7 @@ static int bttv_try_fmt_vid_cap(struct f
 	enum v4l2_field field;
 	__s32 width, height;
 	__s32 height2;
+	unsigned int width_mask, width_bias;
 	int rc;
 
 	fmt = format_by_fourcc(f->fmt.pix.pixelformat);
@@ -2373,9 +2387,9 @@ static int bttv_try_fmt_vid_cap(struct f
 	width = f->fmt.pix.width;
 	height = f->fmt.pix.height;
 
+	bttv_get_width_mask_vid_cap(fmt, &width_mask, &width_bias);
 	rc = limit_scaled_size_lock(fh, &width, &height, field,
-			       /* width_mask: 4 pixels */ ~3,
-			       /* width_bias: nearest */ 2,
+			       width_mask, width_bias,
 			       /* adjust_size */ 1,
 			       /* adjust_crop */ 0);
 	if (0 != rc)
@@ -2408,6 +2422,7 @@ static int bttv_s_fmt_vid_cap(struct fil
 	struct bttv_fh *fh = priv;
 	struct bttv *btv = fh->btv;
 	__s32 width, height;
+	unsigned int width_mask, width_bias;
 	enum v4l2_field field;
 
 	retval = bttv_switch_type(fh, f->type);
@@ -2422,9 +2437,10 @@ static int bttv_s_fmt_vid_cap(struct fil
 	height = f->fmt.pix.height;
 	field = f->fmt.pix.field;
 
+	fmt = format_by_fourcc(f->fmt.pix.pixelformat);
+	bttv_get_width_mask_vid_cap(fmt, &width_mask, &width_bias);
 	retval = limit_scaled_size_lock(fh, &width, &height, f->fmt.pix.field,
-			       /* width_mask: 4 pixels */ ~3,
-			       /* width_bias: nearest */ 2,
+			       width_mask, width_bias,
 			       /* adjust_size */ 1,
 			       /* adjust_crop */ 1);
 	if (0 != retval)
@@ -2432,8 +2448,6 @@ static int bttv_s_fmt_vid_cap(struct fil
 
 	f->fmt.pix.field = field;
 
-	fmt = format_by_fourcc(f->fmt.pix.pixelformat);
-
 	/* update our state informations */
 	fh->fmt              = fmt;
 	fh->cap.field        = f->fmt.pix.field;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/media/pci/saa7134/saa7134-video.c linux-libre-3.18.31-gnu/drivers/media/pci/saa7134/saa7134-video.c
--- linux-libre-3.18.30-gnu/drivers/media/pci/saa7134/saa7134-video.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/media/pci/saa7134/saa7134-video.c	2016-04-19 07:57:18.000000000 -0400
@@ -1230,10 +1230,13 @@ static int saa7134_g_fmt_vid_cap(struct
 	f->fmt.pix.height       = dev->height;
 	f->fmt.pix.field        = dev->field;
 	f->fmt.pix.pixelformat  = dev->fmt->fourcc;
-	f->fmt.pix.bytesperline =
-		(f->fmt.pix.width * dev->fmt->depth) >> 3;
+	if (dev->fmt->planar)
+		f->fmt.pix.bytesperline = f->fmt.pix.width;
+	else
+		f->fmt.pix.bytesperline =
+			(f->fmt.pix.width * dev->fmt->depth) / 8;
 	f->fmt.pix.sizeimage =
-		f->fmt.pix.height * f->fmt.pix.bytesperline;
+		(f->fmt.pix.height * f->fmt.pix.width * dev->fmt->depth) / 8;
 	f->fmt.pix.colorspace   = V4L2_COLORSPACE_SMPTE170M;
 	return 0;
 }
@@ -1309,10 +1312,13 @@ static int saa7134_try_fmt_vid_cap(struc
 	if (f->fmt.pix.height > maxh)
 		f->fmt.pix.height = maxh;
 	f->fmt.pix.width &= ~0x03;
-	f->fmt.pix.bytesperline =
-		(f->fmt.pix.width * fmt->depth) >> 3;
+	if (fmt->planar)
+		f->fmt.pix.bytesperline = f->fmt.pix.width;
+	else
+		f->fmt.pix.bytesperline =
+			(f->fmt.pix.width * fmt->depth) / 8;
 	f->fmt.pix.sizeimage =
-		f->fmt.pix.height * f->fmt.pix.bytesperline;
+		(f->fmt.pix.height * f->fmt.pix.width * fmt->depth) / 8;
 	f->fmt.pix.colorspace   = V4L2_COLORSPACE_SMPTE170M;
 
 	return 0;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/media/tuners/si2157.c linux-libre-3.18.31-gnu/drivers/media/tuners/si2157.c
--- linux-libre-3.18.30-gnu/drivers/media/tuners/si2157.c	2016-04-06 23:59:44.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/media/tuners/si2157.c	2016-04-21 11:28:25.000000000 -0400
@@ -157,6 +157,11 @@ static int si2157_init(struct dvb_fronte
 
 	for (remaining = fw->size; remaining > 0; remaining -= 17) {
 		len = fw->data[fw->size - remaining];
+		if (len > SI2157_ARGLEN) {
+			dev_err(&s->client->dev, "Bad firmware length\n");
+			ret = -EINVAL;
+			goto err;
+		}
 		memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
 		cmd.wlen = len;
 		cmd.rlen = 1;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/media/usb/pwc/pwc-if.c linux-libre-3.18.31-gnu/drivers/media/usb/pwc/pwc-if.c
--- linux-libre-3.18.30-gnu/drivers/media/usb/pwc/pwc-if.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/media/usb/pwc/pwc-if.c	2016-04-19 07:57:18.000000000 -0400
@@ -91,6 +91,7 @@ static const struct usb_device_id pwc_de
 	{ USB_DEVICE(0x0471, 0x0312) },
 	{ USB_DEVICE(0x0471, 0x0313) }, /* the 'new' 720K */
 	{ USB_DEVICE(0x0471, 0x0329) }, /* Philips SPC 900NC PC Camera */
+	{ USB_DEVICE(0x0471, 0x032C) }, /* Philips SPC 880NC PC Camera */
 	{ USB_DEVICE(0x069A, 0x0001) }, /* Askey */
 	{ USB_DEVICE(0x046D, 0x08B0) }, /* Logitech QuickCam Pro 3000 */
 	{ USB_DEVICE(0x046D, 0x08B1) }, /* Logitech QuickCam Notebook Pro */
@@ -799,6 +800,11 @@ static int usb_pwc_probe(struct usb_inte
 			name = "Philips SPC 900NC webcam";
 			type_id = 740;
 			break;
+		case 0x032C:
+			PWC_INFO("Philips SPC 880NC USB webcam detected.\n");
+			name = "Philips SPC 880NC webcam";
+			type_id = 740;
+			break;
 		default:
 			return -ENODEV;
 			break;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/media/v4l2-core/v4l2-compat-ioctl32.c linux-libre-3.18.31-gnu/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
--- linux-libre-3.18.30-gnu/drivers/media/v4l2-core/v4l2-compat-ioctl32.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/media/v4l2-core/v4l2-compat-ioctl32.c	2016-04-19 07:57:18.000000000 -0400
@@ -392,7 +392,8 @@ static int get_v4l2_buffer32(struct v4l2
 		get_user(kp->index, &up->index) ||
 		get_user(kp->type, &up->type) ||
 		get_user(kp->flags, &up->flags) ||
-		get_user(kp->memory, &up->memory))
+		get_user(kp->memory, &up->memory) ||
+		get_user(kp->length, &up->length))
 			return -EFAULT;
 
 	if (V4L2_TYPE_IS_OUTPUT(kp->type))
@@ -404,9 +405,6 @@ static int get_v4l2_buffer32(struct v4l2
 			return -EFAULT;
 
 	if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
-		if (get_user(kp->length, &up->length))
-			return -EFAULT;
-
 		num_planes = kp->length;
 		if (num_planes == 0) {
 			kp->m.planes = NULL;
@@ -439,16 +437,14 @@ static int get_v4l2_buffer32(struct v4l2
 	} else {
 		switch (kp->memory) {
 		case V4L2_MEMORY_MMAP:
-			if (get_user(kp->length, &up->length) ||
-				get_user(kp->m.offset, &up->m.offset))
+			if (get_user(kp->m.offset, &up->m.offset))
 				return -EFAULT;
 			break;
 		case V4L2_MEMORY_USERPTR:
 			{
 			compat_long_t tmp;
 
-			if (get_user(kp->length, &up->length) ||
-			    get_user(tmp, &up->m.userptr))
+			if (get_user(tmp, &up->m.userptr))
 				return -EFAULT;
 
 			kp->m.userptr = (unsigned long)compat_ptr(tmp);
@@ -490,7 +486,8 @@ static int put_v4l2_buffer32(struct v4l2
 		copy_to_user(&up->timecode, &kp->timecode, sizeof(struct v4l2_timecode)) ||
 		put_user(kp->sequence, &up->sequence) ||
 		put_user(kp->reserved2, &up->reserved2) ||
-		put_user(kp->reserved, &up->reserved))
+		put_user(kp->reserved, &up->reserved) ||
+		put_user(kp->length, &up->length))
 			return -EFAULT;
 
 	if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
@@ -513,13 +510,11 @@ static int put_v4l2_buffer32(struct v4l2
 	} else {
 		switch (kp->memory) {
 		case V4L2_MEMORY_MMAP:
-			if (put_user(kp->length, &up->length) ||
-				put_user(kp->m.offset, &up->m.offset))
+			if (put_user(kp->m.offset, &up->m.offset))
 				return -EFAULT;
 			break;
 		case V4L2_MEMORY_USERPTR:
-			if (put_user(kp->length, &up->length) ||
-				put_user(kp->m.userptr, &up->m.userptr))
+			if (put_user(kp->m.userptr, &up->m.userptr))
 				return -EFAULT;
 			break;
 		case V4L2_MEMORY_OVERLAY:
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/mmc/host/mmc_spi.c linux-libre-3.18.31-gnu/drivers/mmc/host/mmc_spi.c
--- linux-libre-3.18.30-gnu/drivers/mmc/host/mmc_spi.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/mmc/host/mmc_spi.c	2016-04-19 07:57:18.000000000 -0400
@@ -1436,6 +1436,12 @@ static int mmc_spi_probe(struct spi_devi
 					     host->pdata->cd_debounce);
 		if (status != 0)
 			goto fail_add_host;
+
+		/* The platform has a CD GPIO signal that may support
+		 * interrupts, so let mmc_gpiod_request_cd_irq() decide
+		 * if polling is needed or not.
+		 */
+		mmc->caps &= ~MMC_CAP_NEEDS_POLL;
 		mmc_gpiod_request_cd_irq(mmc);
 	}
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/mmc/host/sdhci.c linux-libre-3.18.31-gnu/drivers/mmc/host/sdhci.c
--- linux-libre-3.18.30-gnu/drivers/mmc/host/sdhci.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/mmc/host/sdhci.c	2016-04-19 07:57:18.000000000 -0400
@@ -660,9 +660,20 @@ static u8 sdhci_calc_timeout(struct sdhc
 	if (!data)
 		target_timeout = cmd->busy_timeout * 1000;
 	else {
-		target_timeout = data->timeout_ns / 1000;
-		if (host->clock)
-			target_timeout += data->timeout_clks / host->clock;
+		target_timeout = DIV_ROUND_UP(data->timeout_ns, 1000);
+		if (host->clock && data->timeout_clks) {
+			unsigned long long val;
+
+			/*
+			 * data->timeout_clks is in units of clock cycles.
+			 * host->clock is in Hz.  target_timeout is in us.
+			 * Hence, us = 1000000 * cycles / Hz.  Round up.
+			 */
+			val = 1000000 * data->timeout_clks;
+			if (do_div(val, host->clock))
+				target_timeout++;
+			target_timeout += val;
+		}
 	}
 
 	/*
@@ -2978,14 +2989,14 @@ int sdhci_add_host(struct sdhci_host *ho
 		if (caps[0] & SDHCI_TIMEOUT_CLK_UNIT)
 			host->timeout_clk *= 1000;
 
+		if (override_timeout_clk)
+			host->timeout_clk = override_timeout_clk;
+
 		mmc->max_busy_timeout = host->ops->get_max_timeout_count ?
 			host->ops->get_max_timeout_count(host) : 1 << 27;
 		mmc->max_busy_timeout /= host->timeout_clk;
 	}
 
-	if (override_timeout_clk)
-		host->timeout_clk = override_timeout_clk;
-
 	mmc->caps |= MMC_CAP_SDIO_IRQ | MMC_CAP_ERASE | MMC_CAP_CMD23;
 	mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD;
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/mtd/onenand/onenand_base.c linux-libre-3.18.31-gnu/drivers/mtd/onenand/onenand_base.c
--- linux-libre-3.18.30-gnu/drivers/mtd/onenand/onenand_base.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/mtd/onenand/onenand_base.c	2016-04-19 07:57:18.000000000 -0400
@@ -2605,6 +2605,7 @@ static int onenand_default_block_markbad
  */
 static int onenand_block_markbad(struct mtd_info *mtd, loff_t ofs)
 {
+	struct onenand_chip *this = mtd->priv;
 	int ret;
 
 	ret = onenand_block_isbad(mtd, ofs);
@@ -2616,7 +2617,7 @@ static int onenand_block_markbad(struct
 	}
 
 	onenand_get_device(mtd, FL_WRITING);
-	ret = mtd_block_markbad(mtd, ofs);
+	ret = this->block_markbad(mtd, ofs);
 	onenand_release_device(mtd);
 	return ret;
 }
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/net/ethernet/marvell/mvneta.c linux-libre-3.18.31-gnu/drivers/net/ethernet/marvell/mvneta.c
--- linux-libre-3.18.30-gnu/drivers/net/ethernet/marvell/mvneta.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/net/ethernet/marvell/mvneta.c	2016-04-19 07:57:18.000000000 -0400
@@ -3078,7 +3078,7 @@ static int mvneta_probe(struct platform_
 	dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO;
 	dev->hw_features |= dev->features;
 	dev->vlan_features |= dev->features;
-	dev->priv_flags |= IFF_UNICAST_FLT;
+	dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
 	dev->gso_max_segs = MVNETA_MAX_TSO_SEGS;
 
 	err = register_netdev(dev);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/net/irda/irtty-sir.c linux-libre-3.18.31-gnu/drivers/net/irda/irtty-sir.c
--- linux-libre-3.18.30-gnu/drivers/net/irda/irtty-sir.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/net/irda/irtty-sir.c	2016-04-19 07:57:18.000000000 -0400
@@ -430,16 +430,6 @@ static int irtty_open(struct tty_struct
 
 	/* Module stuff handled via irda_ldisc.owner - Jean II */
 
-	/* First make sure we're not already connected. */
-	if (tty->disc_data != NULL) {
-		priv = tty->disc_data;
-		if (priv && priv->magic == IRTTY_MAGIC) {
-			ret = -EEXIST;
-			goto out;
-		}
-		tty->disc_data = NULL;		/* ### */
-	}
-
 	/* stop the underlying  driver */
 	irtty_stop_receiver(tty, TRUE);
 	if (tty->ops->stop)
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/net/rionet.c linux-libre-3.18.31-gnu/drivers/net/rionet.c
--- linux-libre-3.18.30-gnu/drivers/net/rionet.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/net/rionet.c	2016-04-19 07:57:18.000000000 -0400
@@ -280,7 +280,7 @@ static void rionet_outb_msg_event(struct
 	struct net_device *ndev = dev_id;
 	struct rionet_private *rnet = netdev_priv(ndev);
 
-	spin_lock(&rnet->lock);
+	spin_lock(&rnet->tx_lock);
 
 	if (netif_msg_intr(rnet))
 		printk(KERN_INFO
@@ -299,7 +299,7 @@ static void rionet_outb_msg_event(struct
 	if (rnet->tx_cnt < RIONET_TX_RING_SIZE)
 		netif_wake_queue(ndev);
 
-	spin_unlock(&rnet->lock);
+	spin_unlock(&rnet->tx_lock);
 }
 
 static int rionet_open(struct net_device *ndev)
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/of/of_reserved_mem.c linux-libre-3.18.31-gnu/drivers/of/of_reserved_mem.c
--- linux-libre-3.18.30-gnu/drivers/of/of_reserved_mem.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/of/of_reserved_mem.c	2016-04-19 07:57:18.000000000 -0400
@@ -31,11 +31,13 @@ int __init __weak early_init_dt_alloc_re
 	phys_addr_t align, phys_addr_t start, phys_addr_t end, bool nomap,
 	phys_addr_t *res_base)
 {
+	phys_addr_t base;
 	/*
 	 * We use __memblock_alloc_base() because memblock_alloc_base()
 	 * panic()s on allocation failure.
 	 */
-	phys_addr_t base = __memblock_alloc_base(size, align, end);
+	end = !end ? MEMBLOCK_ALLOC_ANYWHERE : end;
+	base = __memblock_alloc_base(size, align, end);
 	if (!base)
 		return -ENOMEM;
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/pci/probe.c linux-libre-3.18.31-gnu/drivers/pci/probe.c
--- linux-libre-3.18.30-gnu/drivers/pci/probe.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/pci/probe.c	2016-04-19 07:57:18.000000000 -0400
@@ -177,6 +177,9 @@ int __pci_read_base(struct pci_dev *dev,
 	struct pci_bus_region region, inverted_region;
 	bool bar_too_big = false, bar_too_high = false, bar_invalid = false;
 
+	if (dev->non_compliant_bars)
+		return 0;
+
 	mask = type ? PCI_ROM_ADDRESS_MASK : ~0;
 
 	/* No printks while decoding is disabled! */
@@ -985,6 +988,8 @@ void set_pcie_port_type(struct pci_dev *
 {
 	int pos;
 	u16 reg16;
+	int type;
+	struct pci_dev *parent;
 
 	pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
 	if (!pos)
@@ -994,6 +999,22 @@ void set_pcie_port_type(struct pci_dev *
 	pdev->pcie_flags_reg = reg16;
 	pci_read_config_word(pdev, pos + PCI_EXP_DEVCAP, &reg16);
 	pdev->pcie_mpss = reg16 & PCI_EXP_DEVCAP_PAYLOAD;
+
+	/*
+	 * A Root Port is always the upstream end of a Link.  No PCIe
+	 * component has two Links.  Two Links are connected by a Switch
+	 * that has a Port on each Link and internal logic to connect the
+	 * two Ports.
+	 */
+	type = pci_pcie_type(pdev);
+	if (type == PCI_EXP_TYPE_ROOT_PORT)
+		pdev->has_secondary_link = 1;
+	else if (type == PCI_EXP_TYPE_UPSTREAM ||
+		 type == PCI_EXP_TYPE_DOWNSTREAM) {
+		parent = pci_upstream_bridge(pdev);
+		if (!parent->has_secondary_link)
+			pdev->has_secondary_link = 1;
+	}
 }
 
 void set_pcie_hotplug_bridge(struct pci_dev *pdev)
@@ -1110,6 +1131,7 @@ int pci_cfg_space_size(struct pci_dev *d
 int pci_setup_device(struct pci_dev *dev)
 {
 	u32 class;
+	u16 cmd;
 	u8 hdr_type;
 	struct pci_slot *slot;
 	int pos = 0;
@@ -1157,6 +1179,16 @@ int pci_setup_device(struct pci_dev *dev
 	/* device class may be changed after fixup */
 	class = dev->class >> 8;
 
+	if (dev->non_compliant_bars) {
+		pci_read_config_word(dev, PCI_COMMAND, &cmd);
+		if (cmd & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) {
+			dev_info(&dev->dev, "device has non-compliant BARs; disabling IO/MEM decoding\n");
+			cmd &= ~PCI_COMMAND_IO;
+			cmd &= ~PCI_COMMAND_MEMORY;
+			pci_write_config_word(dev, PCI_COMMAND, cmd);
+		}
+	}
+
 	switch (dev->hdr_type) {		    /* header type */
 	case PCI_HEADER_TYPE_NORMAL:		    /* standard header */
 		if (class == PCI_CLASS_BRIDGE_PCI)
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/platform/x86/ideapad-laptop.c linux-libre-3.18.31-gnu/drivers/platform/x86/ideapad-laptop.c
--- linux-libre-3.18.30-gnu/drivers/platform/x86/ideapad-laptop.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/platform/x86/ideapad-laptop.c	2016-04-19 07:57:18.000000000 -0400
@@ -839,6 +839,20 @@ static const struct dmi_system_id no_hw_
 		},
 	},
 	{
+		.ident = "Lenovo ideapad Y700-15ISK",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-15ISK"),
+		},
+	},
+	{
+		.ident = "Lenovo ideapad Y700 Touch-15ISK",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700 Touch-15ISK"),
+		},
+	},
+	{
 		.ident = "Lenovo ideapad Y700-17ISK",
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/scsi/aacraid/commsup.c linux-libre-3.18.31-gnu/drivers/scsi/aacraid/commsup.c
--- linux-libre-3.18.30-gnu/drivers/scsi/aacraid/commsup.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/scsi/aacraid/commsup.c	2016-04-19 07:57:18.000000000 -0400
@@ -83,9 +83,12 @@ static int fib_map_alloc(struct aac_dev
 
 void aac_fib_map_free(struct aac_dev *dev)
 {
-	pci_free_consistent(dev->pdev,
-	  dev->max_fib_size * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB),
-	  dev->hw_fib_va, dev->hw_fib_pa);
+	if (dev->hw_fib_va && dev->max_fib_size) {
+		pci_free_consistent(dev->pdev,
+		(dev->max_fib_size *
+		(dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB)),
+		dev->hw_fib_va, dev->hw_fib_pa);
+	}
 	dev->hw_fib_va = NULL;
 	dev->hw_fib_pa = 0;
 }
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/scsi/be2iscsi/be_main.c linux-libre-3.18.31-gnu/drivers/scsi/be2iscsi/be_main.c
--- linux-libre-3.18.30-gnu/drivers/scsi/be2iscsi/be_main.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/scsi/be2iscsi/be_main.c	2016-04-19 07:57:18.000000000 -0400
@@ -4435,6 +4435,7 @@ put_shost:
 	scsi_host_put(phba->shost);
 free_kset:
 	iscsi_boot_destroy_kset(phba->boot_kset);
+	phba->boot_kset = NULL;
 	return -ENOMEM;
 }
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/scsi/sg.c linux-libre-3.18.31-gnu/drivers/scsi/sg.c
--- linux-libre-3.18.30-gnu/drivers/scsi/sg.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/scsi/sg.c	2016-04-19 07:57:18.000000000 -0400
@@ -652,7 +652,8 @@ sg_write(struct file *filp, const char _
 	else
 		hp->dxfer_direction = (mxsize > 0) ? SG_DXFER_FROM_DEV : SG_DXFER_NONE;
 	hp->dxfer_len = mxsize;
-	if (hp->dxfer_direction == SG_DXFER_TO_DEV)
+	if ((hp->dxfer_direction == SG_DXFER_TO_DEV) ||
+	    (hp->dxfer_direction == SG_DXFER_TO_FROM_DEV))
 		hp->dxferp = (char __user *)buf + cmd_size;
 	else
 		hp->dxferp = NULL;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/staging/comedi/drivers/ni_mio_common.c linux-libre-3.18.31-gnu/drivers/staging/comedi/drivers/ni_mio_common.c
--- linux-libre-3.18.30-gnu/drivers/staging/comedi/drivers/ni_mio_common.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/staging/comedi/drivers/ni_mio_common.c	2016-04-19 07:57:18.000000000 -0400
@@ -248,24 +248,24 @@ static void ni_writel(struct comedi_devi
 {
 	if (dev->mmio)
 		writel(data, dev->mmio + reg);
-
-	outl(data, dev->iobase + reg);
+	else
+		outl(data, dev->iobase + reg);
 }
 
 static void ni_writew(struct comedi_device *dev, uint16_t data, int reg)
 {
 	if (dev->mmio)
 		writew(data, dev->mmio + reg);
-
-	outw(data, dev->iobase + reg);
+	else
+		outw(data, dev->iobase + reg);
 }
 
 static void ni_writeb(struct comedi_device *dev, uint8_t data, int reg)
 {
 	if (dev->mmio)
 		writeb(data, dev->mmio + reg);
-
-	outb(data, dev->iobase + reg);
+	else
+		outb(data, dev->iobase + reg);
 }
 
 static uint32_t ni_readl(struct comedi_device *dev, int reg)
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/staging/comedi/drivers/ni_tiocmd.c linux-libre-3.18.31-gnu/drivers/staging/comedi/drivers/ni_tiocmd.c
--- linux-libre-3.18.30-gnu/drivers/staging/comedi/drivers/ni_tiocmd.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/staging/comedi/drivers/ni_tiocmd.c	2016-04-19 07:57:18.000000000 -0400
@@ -94,7 +94,7 @@ static int ni_tio_input_inttrig(struct c
 	unsigned long flags;
 	int ret = 0;
 
-	if (trig_num != cmd->start_src)
+	if (trig_num != cmd->start_arg)
 		return -EINVAL;
 
 	spin_lock_irqsave(&counter->lock, flags);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/target/target_core_transport.c linux-libre-3.18.31-gnu/drivers/target/target_core_transport.c
--- linux-libre-3.18.30-gnu/drivers/target/target_core_transport.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/target/target_core_transport.c	2016-04-19 07:57:18.000000000 -0400
@@ -2537,8 +2537,6 @@ void target_wait_for_sess_cmds(struct se
 
 	list_for_each_entry_safe(se_cmd, tmp_cmd,
 				&se_sess->sess_wait_list, se_cmd_list) {
-		list_del_init(&se_cmd->se_cmd_list);
-
 		pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:"
 			" %d\n", se_cmd, se_cmd->t_state,
 			se_cmd->se_tfo->get_cmd_state(se_cmd));
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/thermal/thermal_core.c linux-libre-3.18.31-gnu/drivers/thermal/thermal_core.c
--- linux-libre-3.18.30-gnu/drivers/thermal/thermal_core.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/thermal/thermal_core.c	2016-04-19 07:57:18.000000000 -0400
@@ -391,6 +391,10 @@ static void handle_thermal_trip(struct t
 {
 	enum thermal_trip_type type;
 
+	/* Ignore disabled trip points */
+	if (test_bit(trip, &tz->trips_disabled))
+		return;
+
 	tz->ops->get_trip_type(tz, trip, &type);
 
 	if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT)
@@ -1484,6 +1488,7 @@ struct thermal_zone_device *thermal_zone
 {
 	struct thermal_zone_device *tz;
 	enum thermal_trip_type trip_type;
+	int trip_temp;
 	int result;
 	int count;
 	int passive = 0;
@@ -1554,9 +1559,15 @@ struct thermal_zone_device *thermal_zone
 		goto unregister;
 
 	for (count = 0; count < trips; count++) {
-		tz->ops->get_trip_type(tz, count, &trip_type);
+		if (tz->ops->get_trip_type(tz, count, &trip_type))
+			set_bit(count, &tz->trips_disabled);
 		if (trip_type == THERMAL_TRIP_PASSIVE)
 			passive = 1;
+		if (tz->ops->get_trip_temp(tz, count, &trip_temp))
+			set_bit(count, &tz->trips_disabled);
+		/* Check for bogus trip points */
+		if (trip_temp == 0)
+			set_bit(count, &tz->trips_disabled);
 	}
 
 	if (!passive) {
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/usb/class/cdc-acm.c linux-libre-3.18.31-gnu/drivers/usb/class/cdc-acm.c
--- linux-libre-3.18.30-gnu/drivers/usb/class/cdc-acm.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/usb/class/cdc-acm.c	2016-04-19 07:57:18.000000000 -0400
@@ -1109,6 +1109,9 @@ static int acm_probe(struct usb_interfac
 	if (quirks == NO_UNION_NORMAL) {
 		data_interface = usb_ifnum_to_if(usb_dev, 1);
 		control_interface = usb_ifnum_to_if(usb_dev, 0);
+		/* we would crash */
+		if (!data_interface || !control_interface)
+			return -ENODEV;
 		goto skip_normal_probe;
 	}
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/usb/core/driver.c linux-libre-3.18.31-gnu/drivers/usb/core/driver.c
--- linux-libre-3.18.30-gnu/drivers/usb/core/driver.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/usb/core/driver.c	2016-04-19 07:57:18.000000000 -0400
@@ -499,11 +499,15 @@ static int usb_unbind_interface(struct d
 int usb_driver_claim_interface(struct usb_driver *driver,
 				struct usb_interface *iface, void *priv)
 {
-	struct device *dev = &iface->dev;
+	struct device *dev;
 	struct usb_device *udev;
 	int retval = 0;
 	int lpm_disable_error;
 
+	if (!iface)
+		return -ENODEV;
+
+	dev = &iface->dev;
 	if (dev->driver)
 		return -EBUSY;
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/usb/core/hub.c linux-libre-3.18.31-gnu/drivers/usb/core/hub.c
--- linux-libre-3.18.30-gnu/drivers/usb/core/hub.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/usb/core/hub.c	2016-04-19 07:57:18.000000000 -0400
@@ -4242,7 +4242,7 @@ hub_port_init (struct usb_hub *hub, stru
 {
 	struct usb_device	*hdev = hub->hdev;
 	struct usb_hcd		*hcd = bus_to_hcd(hdev->bus);
-	int			i, j, retval;
+	int			retries, operations, retval, i;
 	unsigned		delay = HUB_SHORT_RESET_TIME;
 	enum usb_device_speed	oldspeed = udev->speed;
 	const char		*speed;
@@ -4344,7 +4344,7 @@ hub_port_init (struct usb_hub *hub, stru
 	 * first 8 bytes of the device descriptor to get the ep0 maxpacket
 	 * value.
 	 */
-	for (i = 0; i < GET_DESCRIPTOR_TRIES; (++i, msleep(100))) {
+	for (retries = 0; retries < GET_DESCRIPTOR_TRIES; (++retries, msleep(100))) {
 		bool did_new_scheme = false;
 
 		if (use_new_scheme(udev, retry_counter)) {
@@ -4371,7 +4371,7 @@ hub_port_init (struct usb_hub *hub, stru
 			 * 255 is for WUSB devices, we actually need to use
 			 * 512 (WUSB1.0[4.8.1]).
 			 */
-			for (j = 0; j < 3; ++j) {
+			for (operations = 0; operations < 3; ++operations) {
 				buf->bMaxPacketSize0 = 0;
 				r = usb_control_msg(udev, usb_rcvaddr0pipe(),
 					USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
@@ -4391,7 +4391,13 @@ hub_port_init (struct usb_hub *hub, stru
 						r = -EPROTO;
 					break;
 				}
-				if (r == 0)
+				/*
+				 * Some devices time out if they are powered on
+				 * when already connected. They need a second
+				 * reset. But only on the first attempt,
+				 * lest we get into a time out/reset loop
+				 */
+				if (r == 0  || (r == -ETIMEDOUT && retries == 0))
 					break;
 			}
 			udev->descriptor.bMaxPacketSize0 =
@@ -4423,7 +4429,7 @@ hub_port_init (struct usb_hub *hub, stru
 		 * authorization will assign the final address.
 		 */
 		if (udev->wusb == 0) {
-			for (j = 0; j < SET_ADDRESS_TRIES; ++j) {
+			for (operations = 0; operations < SET_ADDRESS_TRIES; ++operations) {
 				retval = hub_set_address(udev, devnum);
 				if (retval >= 0)
 					break;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/usb/misc/iowarrior.c linux-libre-3.18.31-gnu/drivers/usb/misc/iowarrior.c
--- linux-libre-3.18.30-gnu/drivers/usb/misc/iowarrior.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/usb/misc/iowarrior.c	2016-04-19 07:57:18.000000000 -0400
@@ -787,6 +787,12 @@ static int iowarrior_probe(struct usb_in
 	iface_desc = interface->cur_altsetting;
 	dev->product_id = le16_to_cpu(udev->descriptor.idProduct);
 
+	if (iface_desc->desc.bNumEndpoints < 1) {
+		dev_err(&interface->dev, "Invalid number of endpoints\n");
+		retval = -EINVAL;
+		goto error;
+	}
+
 	/* set up the endpoint information */
 	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 		endpoint = &iface_desc->endpoint[i].desc;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/usb/storage/uas.c linux-libre-3.18.31-gnu/drivers/usb/storage/uas.c
--- linux-libre-3.18.30-gnu/drivers/usb/storage/uas.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/usb/storage/uas.c	2016-04-19 07:57:18.000000000 -0400
@@ -820,7 +820,7 @@ static struct scsi_host_template uas_hos
 	.slave_configure = uas_slave_configure,
 	.eh_abort_handler = uas_eh_abort_handler,
 	.eh_bus_reset_handler = uas_eh_bus_reset_handler,
-	.can_queue = 65536,	/* Is there a limit on the _host_ ? */
+	.can_queue = MAX_CMNDS,
 	.this_id = -1,
 	.sg_tablesize = SG_NONE,
 	.cmd_per_lun = 1,	/* until we override it */
diff -druNp --no-dereference linux-libre-3.18.30-gnu/drivers/watchdog/rc32434_wdt.c linux-libre-3.18.31-gnu/drivers/watchdog/rc32434_wdt.c
--- linux-libre-3.18.30-gnu/drivers/watchdog/rc32434_wdt.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/drivers/watchdog/rc32434_wdt.c	2016-04-19 07:57:18.000000000 -0400
@@ -237,7 +237,7 @@ static long rc32434_wdt_ioctl(struct fil
 			return -EINVAL;
 		/* Fall through */
 	case WDIOC_GETTIMEOUT:
-		return copy_to_user(argp, &timeout, sizeof(int));
+		return copy_to_user(argp, &timeout, sizeof(int)) ? -EFAULT : 0;
 	default:
 		return -ENOTTY;
 	}
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/btrfs/async-thread.c linux-libre-3.18.31-gnu/fs/btrfs/async-thread.c
--- linux-libre-3.18.30-gnu/fs/btrfs/async-thread.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/btrfs/async-thread.c	2016-04-19 07:57:18.000000000 -0400
@@ -316,8 +316,8 @@ static inline void __btrfs_queue_work(st
 		list_add_tail(&work->ordered_list, &wq->ordered_list);
 		spin_unlock_irqrestore(&wq->list_lock, flags);
 	}
-	queue_work(wq->normal_wq, &work->normal_work);
 	trace_btrfs_work_queued(work);
+	queue_work(wq->normal_wq, &work->normal_work);
 }
 
 void btrfs_queue_work(struct btrfs_workqueue *wq,
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/btrfs/disk-io.c linux-libre-3.18.31-gnu/fs/btrfs/disk-io.c
--- linux-libre-3.18.30-gnu/fs/btrfs/disk-io.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/btrfs/disk-io.c	2016-04-19 07:57:18.000000000 -0400
@@ -2418,6 +2418,7 @@ int open_ctree(struct super_block *sb,
 	if (btrfs_check_super_csum(bh->b_data)) {
 		printk(KERN_ERR "BTRFS: superblock checksum mismatch\n");
 		err = -EINVAL;
+		brelse(bh);
 		goto fail_alloc;
 	}
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/btrfs/inode.c linux-libre-3.18.31-gnu/fs/btrfs/inode.c
--- linux-libre-3.18.30-gnu/fs/btrfs/inode.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/btrfs/inode.c	2016-04-19 07:57:18.000000000 -0400
@@ -6092,7 +6092,7 @@ out_unlock_inode:
 static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
 		      struct dentry *dentry)
 {
-	struct btrfs_trans_handle *trans;
+	struct btrfs_trans_handle *trans = NULL;
 	struct btrfs_root *root = BTRFS_I(dir)->root;
 	struct inode *inode = old_dentry->d_inode;
 	u64 index;
@@ -6118,6 +6118,7 @@ static int btrfs_link(struct dentry *old
 	trans = btrfs_start_transaction(root, 5);
 	if (IS_ERR(trans)) {
 		err = PTR_ERR(trans);
+		trans = NULL;
 		goto fail;
 	}
 
@@ -6151,9 +6152,10 @@ static int btrfs_link(struct dentry *old
 		btrfs_log_new_name(trans, inode, NULL, parent);
 	}
 
-	btrfs_end_transaction(trans, root);
 	btrfs_balance_delayed_items(root);
 fail:
+	if (trans)
+		btrfs_end_transaction(trans, root);
 	if (drop_inode) {
 		inode_dec_link_count(inode);
 		iput(inode);
@@ -8053,15 +8055,28 @@ int btrfs_readpage(struct file *file, st
 static int btrfs_writepage(struct page *page, struct writeback_control *wbc)
 {
 	struct extent_io_tree *tree;
-
+	struct inode *inode = page->mapping->host;
+	int ret;
 
 	if (current->flags & PF_MEMALLOC) {
 		redirty_page_for_writepage(wbc, page);
 		unlock_page(page);
 		return 0;
 	}
+
+	/*
+	 * If we are under memory pressure we will call this directly from the
+	 * VM, we need to make sure we have the inode referenced for the ordered
+	 * extent.  If not just return like we didn't do anything.
+	 */
+	if (!igrab(inode)) {
+		redirty_page_for_writepage(wbc, page);
+		return AOP_WRITEPAGE_ACTIVATE;
+	}
 	tree = &BTRFS_I(page->mapping->host)->io_tree;
-	return extent_write_full_page(tree, page, btrfs_get_extent, wbc);
+	ret = extent_write_full_page(tree, page, btrfs_get_extent, wbc);
+	btrfs_add_delayed_iput(inode);
+	return ret;
 }
 
 static int btrfs_writepages(struct address_space *mapping,
@@ -9137,9 +9152,11 @@ static int btrfs_symlink(struct inode *d
 	/*
 	 * 2 items for inode item and ref
 	 * 2 items for dir items
+	 * 1 item for updating parent inode item
+	 * 1 item for the inline extent item
 	 * 1 item for xattr if selinux is on
 	 */
-	trans = btrfs_start_transaction(root, 5);
+	trans = btrfs_start_transaction(root, 7);
 	if (IS_ERR(trans))
 		return PTR_ERR(trans);
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/btrfs/send.c linux-libre-3.18.31-gnu/fs/btrfs/send.c
--- linux-libre-3.18.30-gnu/fs/btrfs/send.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/btrfs/send.c	2016-04-19 07:57:18.000000000 -0400
@@ -1461,7 +1461,21 @@ static int read_symlink(struct btrfs_roo
 	ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
 	if (ret < 0)
 		goto out;
-	BUG_ON(ret);
+	if (ret) {
+		/*
+		 * An empty symlink inode. Can happen in rare error paths when
+		 * creating a symlink (transaction committed before the inode
+		 * eviction handler removed the symlink inode items and a crash
+		 * happened in between or the subvol was snapshoted in between).
+		 * Print an informative message to dmesg/syslog so that the user
+		 * can delete the symlink.
+		 */
+		btrfs_err(root->fs_info,
+			  "Found empty symlink inode %llu at root %llu",
+			  ino, root->root_key.objectid);
+		ret = -EIO;
+		goto out;
+	}
 
 	ei = btrfs_item_ptr(path->nodes[0], path->slots[0],
 			struct btrfs_file_extent_item);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/btrfs/super.c linux-libre-3.18.31-gnu/fs/btrfs/super.c
--- linux-libre-3.18.30-gnu/fs/btrfs/super.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/btrfs/super.c	2016-04-19 07:57:18.000000000 -0400
@@ -1775,6 +1775,8 @@ static int btrfs_calc_avail_data_space(s
  * there are other factors that may change the result (like a new metadata
  * chunk).
  *
+ * If metadata is exhausted, f_bavail will be 0.
+ *
  * FIXME: not accurate for mixed block groups, total and free/used are ok,
  * available appears slightly larger.
  */
@@ -1786,11 +1788,13 @@ static int btrfs_statfs(struct dentry *d
 	struct btrfs_space_info *found;
 	u64 total_used = 0;
 	u64 total_free_data = 0;
+	u64 total_free_meta = 0;
 	int bits = dentry->d_sb->s_blocksize_bits;
 	__be32 *fsid = (__be32 *)fs_info->fsid;
 	unsigned factor = 1;
 	struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv;
 	int ret;
+	u64 thresh = 0;
 
 	/*
 	 * holding chunk_muext to avoid allocating new chunks, holding
@@ -1818,6 +1822,8 @@ static int btrfs_statfs(struct dentry *d
 				}
 			}
 		}
+		if (found->flags & BTRFS_BLOCK_GROUP_METADATA)
+			total_free_meta += found->disk_total - found->disk_used;
 
 		total_used += found->disk_used;
 	}
@@ -1845,6 +1851,24 @@ static int btrfs_statfs(struct dentry *d
 	mutex_unlock(&fs_info->chunk_mutex);
 	mutex_unlock(&fs_info->fs_devices->device_list_mutex);
 
+	/*
+	 * We calculate the remaining metadata space minus global reserve. If
+	 * this is (supposedly) smaller than zero, there's no space. But this
+	 * does not hold in practice, the exhausted state happens where's still
+	 * some positive delta. So we apply some guesswork and compare the
+	 * delta to a 4M threshold.  (Practically observed delta was ~2M.)
+	 *
+	 * We probably cannot calculate the exact threshold value because this
+	 * depends on the internal reservations requested by various
+	 * operations, so some operations that consume a few metadata will
+	 * succeed even if the Avail is zero. But this is better than the other
+	 * way around.
+	 */
+	thresh = 4 * 1024 * 1024;
+
+	if (total_free_meta - thresh < block_rsv->size)
+		buf->f_bavail = 0;
+
 	buf->f_type = BTRFS_SUPER_MAGIC;
 	buf->f_bsize = dentry->d_sb->s_blocksize;
 	buf->f_namelen = BTRFS_NAME_LEN;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/btrfs/volumes.c linux-libre-3.18.31-gnu/fs/btrfs/volumes.c
--- linux-libre-3.18.30-gnu/fs/btrfs/volumes.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/btrfs/volumes.c	2016-04-19 07:57:18.000000000 -0400
@@ -162,6 +162,7 @@ static struct btrfs_device *__alloc_devi
 	spin_lock_init(&dev->reada_lock);
 	atomic_set(&dev->reada_in_flight, 0);
 	atomic_set(&dev->dev_stats_ccnt, 0);
+	btrfs_device_data_ordered_init(dev);
 	INIT_RADIX_TREE(&dev->reada_zones, GFP_NOFS & ~__GFP_WAIT);
 	INIT_RADIX_TREE(&dev->reada_extents, GFP_NOFS & ~__GFP_WAIT);
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/coredump.c linux-libre-3.18.31-gnu/fs/coredump.c
--- linux-libre-3.18.30-gnu/fs/coredump.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/coredump.c	2016-04-19 07:57:18.000000000 -0400
@@ -32,6 +32,9 @@
 #include <linux/pipe_fs_i.h>
 #include <linux/oom.h>
 #include <linux/compat.h>
+#include <linux/sched.h>
+#include <linux/fs.h>
+#include <linux/path.h>
 
 #include <asm/uaccess.h>
 #include <asm/mmu_context.h>
@@ -621,6 +624,8 @@ void do_coredump(const siginfo_t *siginf
 		}
 	} else {
 		struct inode *inode;
+		int open_flags = O_CREAT | O_RDWR | O_NOFOLLOW |
+				 O_LARGEFILE | O_EXCL;
 
 		if (cprm.limit < binfmt->min_coredump)
 			goto fail_unlock;
@@ -659,10 +664,27 @@ void do_coredump(const siginfo_t *siginf
 		 * what matters is that at least one of the two processes
 		 * writes its coredump successfully, not which one.
 		 */
-		cprm.file = filp_open(cn.corename,
-				 O_CREAT | 2 | O_NOFOLLOW |
-				 O_LARGEFILE | O_EXCL,
-				 0600);
+		if (need_suid_safe) {
+			/*
+			 * Using user namespaces, normal user tasks can change
+			 * their current->fs->root to point to arbitrary
+			 * directories. Since the intention of the "only dump
+			 * with a fully qualified path" rule is to control where
+			 * coredumps may be placed using root privileges,
+			 * current->fs->root must not be used. Instead, use the
+			 * root directory of init_task.
+			 */
+			struct path root;
+
+			task_lock(&init_task);
+			get_fs_root(init_task.fs, &root);
+			task_unlock(&init_task);
+			cprm.file = file_open_root(root.dentry, root.mnt,
+				cn.corename, open_flags, 0600);
+			path_put(&root);
+		} else {
+			cprm.file = filp_open(cn.corename, open_flags, 0600);
+		}
 		if (IS_ERR(cprm.file))
 			goto fail_unlock;
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/efivarfs/file.c linux-libre-3.18.31-gnu/fs/efivarfs/file.c
--- linux-libre-3.18.30-gnu/fs/efivarfs/file.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/efivarfs/file.c	2016-04-19 07:57:18.000000000 -0400
@@ -10,6 +10,7 @@
 #include <linux/efi.h>
 #include <linux/fs.h>
 #include <linux/slab.h>
+#include <linux/mount.h>
 
 #include "internal.h"
 
@@ -103,9 +104,79 @@ out_free:
 	return size;
 }
 
+static int
+efivarfs_ioc_getxflags(struct file *file, void __user *arg)
+{
+	struct inode *inode = file->f_mapping->host;
+	unsigned int i_flags;
+	unsigned int flags = 0;
+
+	i_flags = inode->i_flags;
+	if (i_flags & S_IMMUTABLE)
+		flags |= FS_IMMUTABLE_FL;
+
+	if (copy_to_user(arg, &flags, sizeof(flags)))
+		return -EFAULT;
+	return 0;
+}
+
+static int
+efivarfs_ioc_setxflags(struct file *file, void __user *arg)
+{
+	struct inode *inode = file->f_mapping->host;
+	unsigned int flags;
+	unsigned int i_flags = 0;
+	int error;
+
+	if (!inode_owner_or_capable(inode))
+		return -EACCES;
+
+	if (copy_from_user(&flags, arg, sizeof(flags)))
+		return -EFAULT;
+
+	if (flags & ~FS_IMMUTABLE_FL)
+		return -EOPNOTSUPP;
+
+	if (!capable(CAP_LINUX_IMMUTABLE))
+		return -EPERM;
+
+	if (flags & FS_IMMUTABLE_FL)
+		i_flags |= S_IMMUTABLE;
+
+
+	error = mnt_want_write_file(file);
+	if (error)
+		return error;
+
+	mutex_lock(&inode->i_mutex);
+	inode->i_flags &= ~S_IMMUTABLE;
+	inode->i_flags |= i_flags;
+	mutex_unlock(&inode->i_mutex);
+
+	mnt_drop_write_file(file);
+
+	return 0;
+}
+
+long
+efivarfs_file_ioctl(struct file *file, unsigned int cmd, unsigned long p)
+{
+	void __user *arg = (void __user *)p;
+
+	switch (cmd) {
+	case FS_IOC_GETFLAGS:
+		return efivarfs_ioc_getxflags(file, arg);
+	case FS_IOC_SETFLAGS:
+		return efivarfs_ioc_setxflags(file, arg);
+	}
+
+	return -ENOTTY;
+}
+
 const struct file_operations efivarfs_file_operations = {
 	.open	= simple_open,
 	.read	= efivarfs_file_read,
 	.write	= efivarfs_file_write,
 	.llseek	= no_llseek,
+	.unlocked_ioctl = efivarfs_file_ioctl,
 };
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/efivarfs/inode.c linux-libre-3.18.31-gnu/fs/efivarfs/inode.c
--- linux-libre-3.18.30-gnu/fs/efivarfs/inode.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/efivarfs/inode.c	2016-04-19 07:57:18.000000000 -0400
@@ -15,7 +15,8 @@
 #include "internal.h"
 
 struct inode *efivarfs_get_inode(struct super_block *sb,
-				const struct inode *dir, int mode, dev_t dev)
+				const struct inode *dir, int mode,
+				dev_t dev, bool is_removable)
 {
 	struct inode *inode = new_inode(sb);
 
@@ -23,6 +24,7 @@ struct inode *efivarfs_get_inode(struct
 		inode->i_ino = get_next_ino();
 		inode->i_mode = mode;
 		inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+		inode->i_flags = is_removable ? 0 : S_IMMUTABLE;
 		switch (mode & S_IFMT) {
 		case S_IFREG:
 			inode->i_fop = &efivarfs_file_operations;
@@ -102,22 +104,17 @@ static void efivarfs_hex_to_guid(const c
 static int efivarfs_create(struct inode *dir, struct dentry *dentry,
 			  umode_t mode, bool excl)
 {
-	struct inode *inode;
+	struct inode *inode = NULL;
 	struct efivar_entry *var;
 	int namelen, i = 0, err = 0;
+	bool is_removable = false;
 
 	if (!efivarfs_valid_name(dentry->d_name.name, dentry->d_name.len))
 		return -EINVAL;
 
-	inode = efivarfs_get_inode(dir->i_sb, dir, mode, 0);
-	if (!inode)
-		return -ENOMEM;
-
 	var = kzalloc(sizeof(struct efivar_entry), GFP_KERNEL);
-	if (!var) {
-		err = -ENOMEM;
-		goto out;
-	}
+	if (!var)
+		return -ENOMEM;
 
 	/* length of the variable name itself: remove GUID and separator */
 	namelen = dentry->d_name.len - EFI_VARIABLE_GUID_LEN - 1;
@@ -125,6 +122,16 @@ static int efivarfs_create(struct inode
 	efivarfs_hex_to_guid(dentry->d_name.name + namelen + 1,
 			&var->var.VendorGuid);
 
+	if (efivar_variable_is_removable(var->var.VendorGuid,
+					 dentry->d_name.name, namelen))
+		is_removable = true;
+
+	inode = efivarfs_get_inode(dir->i_sb, dir, mode, 0, is_removable);
+	if (!inode) {
+		err = -ENOMEM;
+		goto out;
+	}
+
 	for (i = 0; i < namelen; i++)
 		var->var.VariableName[i] = dentry->d_name.name[i];
 
@@ -138,7 +145,8 @@ static int efivarfs_create(struct inode
 out:
 	if (err) {
 		kfree(var);
-		iput(inode);
+		if (inode)
+			iput(inode);
 	}
 	return err;
 }
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/efivarfs/internal.h linux-libre-3.18.31-gnu/fs/efivarfs/internal.h
--- linux-libre-3.18.30-gnu/fs/efivarfs/internal.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/efivarfs/internal.h	2016-04-19 07:57:18.000000000 -0400
@@ -15,7 +15,8 @@ extern const struct file_operations efiv
 extern const struct inode_operations efivarfs_dir_inode_operations;
 extern bool efivarfs_valid_name(const char *str, int len);
 extern struct inode *efivarfs_get_inode(struct super_block *sb,
-			const struct inode *dir, int mode, dev_t dev);
+			const struct inode *dir, int mode, dev_t dev,
+			bool is_removable);
 
 extern struct list_head efivarfs_list;
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/efivarfs/super.c linux-libre-3.18.31-gnu/fs/efivarfs/super.c
--- linux-libre-3.18.30-gnu/fs/efivarfs/super.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/efivarfs/super.c	2016-04-19 07:57:18.000000000 -0400
@@ -118,8 +118,9 @@ static int efivarfs_callback(efi_char16_
 	struct dentry *dentry, *root = sb->s_root;
 	unsigned long size = 0;
 	char *name;
-	int len, i;
+	int len;
 	int err = -ENOMEM;
+	bool is_removable = false;
 
 	entry = kzalloc(sizeof(*entry), GFP_KERNEL);
 	if (!entry)
@@ -128,15 +129,17 @@ static int efivarfs_callback(efi_char16_
 	memcpy(entry->var.VariableName, name16, name_size);
 	memcpy(&(entry->var.VendorGuid), &vendor, sizeof(efi_guid_t));
 
-	len = ucs2_strlen(entry->var.VariableName);
+	len = ucs2_utf8size(entry->var.VariableName);
 
 	/* name, plus '-', plus GUID, plus NUL*/
 	name = kmalloc(len + 1 + EFI_VARIABLE_GUID_LEN + 1, GFP_KERNEL);
 	if (!name)
 		goto fail;
 
-	for (i = 0; i < len; i++)
-		name[i] = entry->var.VariableName[i] & 0xFF;
+	ucs2_as_utf8(name, entry->var.VariableName, len);
+
+	if (efivar_variable_is_removable(entry->var.VendorGuid, name, len))
+		is_removable = true;
 
 	name[len] = '-';
 
@@ -144,7 +147,8 @@ static int efivarfs_callback(efi_char16_
 
 	name[len + EFI_VARIABLE_GUID_LEN+1] = '\0';
 
-	inode = efivarfs_get_inode(sb, root->d_inode, S_IFREG | 0644, 0);
+	inode = efivarfs_get_inode(sb, root->d_inode, S_IFREG | 0644, 0,
+				   is_removable);
 	if (!inode)
 		goto fail_name;
 
@@ -200,7 +204,7 @@ static int efivarfs_fill_super(struct su
 	sb->s_d_op		= &efivarfs_d_ops;
 	sb->s_time_gran         = 1;
 
-	inode = efivarfs_get_inode(sb, NULL, S_IFDIR | 0755, 0);
+	inode = efivarfs_get_inode(sb, NULL, S_IFDIR | 0755, 0, true);
 	if (!inode)
 		return -ENOMEM;
 	inode->i_op = &efivarfs_dir_inode_operations;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/ext4/move_extent.c linux-libre-3.18.31-gnu/fs/ext4/move_extent.c
--- linux-libre-3.18.30-gnu/fs/ext4/move_extent.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/ext4/move_extent.c	2016-04-19 07:57:18.000000000 -0400
@@ -397,6 +397,7 @@ data_copy:
 		*err = ext4_get_block(orig_inode, orig_blk_offset + i, bh, 0);
 		if (*err < 0)
 			break;
+		bh = bh->b_this_page;
 	}
 	if (!*err)
 		*err = block_commit_write(pagep[0], from, from + replaced_size);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/fhandle.c linux-libre-3.18.31-gnu/fs/fhandle.c
--- linux-libre-3.18.30-gnu/fs/fhandle.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/fhandle.c	2016-04-19 07:57:18.000000000 -0400
@@ -228,7 +228,7 @@ long do_handle_open(int mountdirfd,
 		path_put(&path);
 		return fd;
 	}
-	file = file_open_root(path.dentry, path.mnt, "", open_flag);
+	file = file_open_root(path.dentry, path.mnt, "", open_flag, 0);
 	if (IS_ERR(file)) {
 		put_unused_fd(fd);
 		retval =  PTR_ERR(file);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/fuse/file.c linux-libre-3.18.31-gnu/fs/fuse/file.c
--- linux-libre-3.18.30-gnu/fs/fuse/file.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/fuse/file.c	2016-04-19 07:57:18.000000000 -0400
@@ -1088,6 +1088,7 @@ static ssize_t fuse_fill_write_pages(str
 		tmp = iov_iter_copy_from_user_atomic(page, ii, offset, bytes);
 		flush_dcache_page(page);
 
+		iov_iter_advance(ii, tmp);
 		if (!tmp) {
 			unlock_page(page);
 			page_cache_release(page);
@@ -1100,7 +1101,6 @@ static ssize_t fuse_fill_write_pages(str
 		req->page_descs[req->num_pages].length = tmp;
 		req->num_pages++;
 
-		iov_iter_advance(ii, tmp);
 		count += tmp;
 		pos += tmp;
 		offset += tmp;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/jbd2/journal.c linux-libre-3.18.31-gnu/fs/jbd2/journal.c
--- linux-libre-3.18.30-gnu/fs/jbd2/journal.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/jbd2/journal.c	2016-04-19 07:57:18.000000000 -0400
@@ -1423,11 +1423,12 @@ out:
 /**
  * jbd2_mark_journal_empty() - Mark on disk journal as empty.
  * @journal: The journal to update.
+ * @write_op: With which operation should we write the journal sb
  *
  * Update a journal's dynamic superblock fields to show that journal is empty.
  * Write updated superblock to disk waiting for IO to complete.
  */
-static void jbd2_mark_journal_empty(journal_t *journal)
+static void jbd2_mark_journal_empty(journal_t *journal, int write_op)
 {
 	journal_superblock_t *sb = journal->j_superblock;
 
@@ -1445,7 +1446,7 @@ static void jbd2_mark_journal_empty(jour
 	sb->s_start    = cpu_to_be32(0);
 	read_unlock(&journal->j_state_lock);
 
-	jbd2_write_superblock(journal, WRITE_FUA);
+	jbd2_write_superblock(journal, write_op);
 
 	/* Log is no longer empty */
 	write_lock(&journal->j_state_lock);
@@ -1730,7 +1731,13 @@ int jbd2_journal_destroy(journal_t *jour
 	if (journal->j_sb_buffer) {
 		if (!is_journal_aborted(journal)) {
 			mutex_lock(&journal->j_checkpoint_mutex);
-			jbd2_mark_journal_empty(journal);
+
+			write_lock(&journal->j_state_lock);
+			journal->j_tail_sequence =
+				++journal->j_transaction_sequence;
+			write_unlock(&journal->j_state_lock);
+
+			jbd2_mark_journal_empty(journal, WRITE_FLUSH_FUA);
 			mutex_unlock(&journal->j_checkpoint_mutex);
 		} else
 			err = -EIO;
@@ -1990,7 +1997,7 @@ int jbd2_journal_flush(journal_t *journa
 	 * the magic code for a fully-recovered superblock.  Any future
 	 * commits of data to the journal will restore the current
 	 * s_start value. */
-	jbd2_mark_journal_empty(journal);
+	jbd2_mark_journal_empty(journal, WRITE_FUA);
 	mutex_unlock(&journal->j_checkpoint_mutex);
 	write_lock(&journal->j_state_lock);
 	J_ASSERT(!journal->j_running_transaction);
@@ -2036,7 +2043,7 @@ int jbd2_journal_wipe(journal_t *journal
 	if (write) {
 		/* Lock to make assertions happy... */
 		mutex_lock(&journal->j_checkpoint_mutex);
-		jbd2_mark_journal_empty(journal);
+		jbd2_mark_journal_empty(journal, WRITE_FUA);
 		mutex_unlock(&journal->j_checkpoint_mutex);
 	}
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/nfsd/nfs4proc.c linux-libre-3.18.31-gnu/fs/nfsd/nfs4proc.c
--- linux-libre-3.18.30-gnu/fs/nfsd/nfs4proc.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/nfsd/nfs4proc.c	2016-04-19 07:57:18.000000000 -0400
@@ -878,6 +878,7 @@ nfsd4_secinfo(struct svc_rqst *rqstp, st
 				    &exp, &dentry);
 	if (err)
 		return err;
+	fh_unlock(&cstate->current_fh);
 	if (dentry->d_inode == NULL) {
 		exp_put(exp);
 		err = nfserr_noent;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/nfsd/nfs4xdr.c linux-libre-3.18.31-gnu/fs/nfsd/nfs4xdr.c
--- linux-libre-3.18.30-gnu/fs/nfsd/nfs4xdr.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/nfsd/nfs4xdr.c	2016-04-19 07:57:18.000000000 -0400
@@ -1061,8 +1061,9 @@ nfsd4_decode_rename(struct nfsd4_compoun
 
 	READ_BUF(4);
 	rename->rn_snamelen = be32_to_cpup(p++);
-	READ_BUF(rename->rn_snamelen + 4);
+	READ_BUF(rename->rn_snamelen);
 	SAVEMEM(rename->rn_sname, rename->rn_snamelen);
+	READ_BUF(4);
 	rename->rn_tnamelen = be32_to_cpup(p++);
 	READ_BUF(rename->rn_tnamelen);
 	SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
@@ -1144,13 +1145,14 @@ nfsd4_decode_setclientid(struct nfsd4_co
 	READ_BUF(8);
 	setclientid->se_callback_prog = be32_to_cpup(p++);
 	setclientid->se_callback_netid_len = be32_to_cpup(p++);
-
-	READ_BUF(setclientid->se_callback_netid_len + 4);
+	READ_BUF(setclientid->se_callback_netid_len);
 	SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
+	READ_BUF(4);
 	setclientid->se_callback_addr_len = be32_to_cpup(p++);
 
-	READ_BUF(setclientid->se_callback_addr_len + 4);
+	READ_BUF(setclientid->se_callback_addr_len);
 	SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
+	READ_BUF(4);
 	setclientid->se_callback_ident = be32_to_cpup(p++);
 
 	DECODE_TAIL;
@@ -1646,8 +1648,9 @@ nfsd4_decode_compound(struct nfsd4_compo
 
 	READ_BUF(4);
 	argp->taglen = be32_to_cpup(p++);
-	READ_BUF(argp->taglen + 8);
+	READ_BUF(argp->taglen);
 	SAVEMEM(argp->tag, argp->taglen);
+	READ_BUF(8);
 	argp->minorversion = be32_to_cpup(p++);
 	argp->opcnt = be32_to_cpup(p++);
 	max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/ocfs2/dlm/dlmconvert.c linux-libre-3.18.31-gnu/fs/ocfs2/dlm/dlmconvert.c
--- linux-libre-3.18.30-gnu/fs/ocfs2/dlm/dlmconvert.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/ocfs2/dlm/dlmconvert.c	2016-04-19 07:57:18.000000000 -0400
@@ -262,6 +262,7 @@ enum dlm_status dlmconvert_remote(struct
 				  struct dlm_lock *lock, int flags, int type)
 {
 	enum dlm_status status;
+	u8 old_owner = res->owner;
 
 	mlog(0, "type=%d, convert_type=%d, busy=%d\n", lock->ml.type,
 	     lock->ml.convert_type, res->state & DLM_LOCK_RES_IN_PROGRESS);
@@ -287,6 +288,19 @@ enum dlm_status dlmconvert_remote(struct
 		status = DLM_DENIED;
 		goto bail;
 	}
+
+	if (lock->ml.type == type && lock->ml.convert_type == LKM_IVMODE) {
+		mlog(0, "last convert request returned DLM_RECOVERING, but "
+		     "owner has already queued and sent ast to me. res %.*s, "
+		     "(cookie=%u:%llu, type=%d, conv=%d)\n",
+		     res->lockname.len, res->lockname.name,
+		     dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)),
+		     dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)),
+		     lock->ml.type, lock->ml.convert_type);
+		status = DLM_NORMAL;
+		goto bail;
+	}
+
 	res->state |= DLM_LOCK_RES_IN_PROGRESS;
 	/* move lock to local convert queue */
 	/* do not alter lock refcount.  switching lists. */
@@ -316,11 +330,19 @@ enum dlm_status dlmconvert_remote(struct
 	spin_lock(&res->spinlock);
 	res->state &= ~DLM_LOCK_RES_IN_PROGRESS;
 	lock->convert_pending = 0;
-	/* if it failed, move it back to granted queue */
+	/* if it failed, move it back to granted queue.
+	 * if master returns DLM_NORMAL and then down before sending ast,
+	 * it may have already been moved to granted queue, reset to
+	 * DLM_RECOVERING and retry convert */
 	if (status != DLM_NORMAL) {
 		if (status != DLM_NOTQUEUED)
 			dlm_error(status);
 		dlm_revert_pending_convert(res, lock);
+	} else if ((res->state & DLM_LOCK_RES_RECOVERING) ||
+			(old_owner != res->owner)) {
+		mlog(0, "res %.*s is in recovering or has been recovered.\n",
+				res->lockname.len, res->lockname.name);
+		status = DLM_RECOVERING;
 	}
 bail:
 	spin_unlock(&res->spinlock);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/ocfs2/dlm/dlmrecovery.c linux-libre-3.18.31-gnu/fs/ocfs2/dlm/dlmrecovery.c
--- linux-libre-3.18.30-gnu/fs/ocfs2/dlm/dlmrecovery.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/ocfs2/dlm/dlmrecovery.c	2016-04-19 07:57:18.000000000 -0400
@@ -2056,7 +2056,6 @@ void dlm_move_lockres_to_recovery_list(s
 			dlm_lock_get(lock);
 			if (lock->convert_pending) {
 				/* move converting lock back to granted */
-				BUG_ON(i != DLM_CONVERTING_LIST);
 				mlog(0, "node died with convert pending "
 				     "on %.*s. move back to granted list.\n",
 				     res->lockname.len, res->lockname.name);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/open.c linux-libre-3.18.31-gnu/fs/open.c
--- linux-libre-3.18.30-gnu/fs/open.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/open.c	2016-04-19 07:57:18.000000000 -0400
@@ -968,14 +968,12 @@ struct file *filp_open(const char *filen
 EXPORT_SYMBOL(filp_open);
 
 struct file *file_open_root(struct dentry *dentry, struct vfsmount *mnt,
-			    const char *filename, int flags)
+			    const char *filename, int flags, umode_t mode)
 {
 	struct open_flags op;
-	int err = build_open_flags(flags, 0, &op);
+	int err = build_open_flags(flags, mode, &op);
 	if (err)
 		return ERR_PTR(err);
-	if (flags & O_CREAT)
-		return ERR_PTR(-EINVAL);
 	if (!filename && (flags & O_DIRECTORY))
 		if (!dentry->d_inode->i_op->lookup)
 			return ERR_PTR(-ENOTDIR);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/overlayfs/inode.c linux-libre-3.18.31-gnu/fs/overlayfs/inode.c
--- linux-libre-3.18.30-gnu/fs/overlayfs/inode.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/overlayfs/inode.c	2016-04-19 07:57:18.000000000 -0400
@@ -49,15 +49,15 @@ int ovl_setattr(struct dentry *dentry, s
 	if (err)
 		goto out;
 
-	upperdentry = ovl_dentry_upper(dentry);
-	if (upperdentry) {
+	err = ovl_copy_up(dentry);
+	if (!err) {
+		upperdentry = ovl_dentry_upper(dentry);
+
 		mutex_lock(&upperdentry->d_inode->i_mutex);
 		err = notify_change(upperdentry, attr, NULL);
 		if (!err)
 			ovl_copyattr(upperdentry->d_inode, dentry->d_inode);
 		mutex_unlock(&upperdentry->d_inode->i_mutex);
-	} else {
-		err = ovl_copy_up_last(dentry, attr, false);
 	}
 	ovl_drop_write(dentry);
 out:
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/proc/array.c linux-libre-3.18.31-gnu/fs/proc/array.c
--- linux-libre-3.18.30-gnu/fs/proc/array.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/proc/array.c	2016-04-19 07:57:18.000000000 -0400
@@ -391,7 +391,7 @@ static int do_task_stat(struct seq_file
 
 	state = *get_task_state(task);
 	vsize = eip = esp = 0;
-	permitted = ptrace_may_access(task, PTRACE_MODE_READ | PTRACE_MODE_NOAUDIT);
+	permitted = ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS | PTRACE_MODE_NOAUDIT);
 	mm = get_task_mm(task);
 	if (mm) {
 		vsize = task_vsize(mm);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/proc/base.c linux-libre-3.18.31-gnu/fs/proc/base.c
--- linux-libre-3.18.30-gnu/fs/proc/base.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/proc/base.c	2016-04-19 07:57:18.000000000 -0400
@@ -211,7 +211,7 @@ static int proc_pid_cmdline(struct seq_f
 static int proc_pid_auxv(struct seq_file *m, struct pid_namespace *ns,
 			 struct pid *pid, struct task_struct *task)
 {
-	struct mm_struct *mm = mm_access(task, PTRACE_MODE_READ);
+	struct mm_struct *mm = mm_access(task, PTRACE_MODE_READ_FSCREDS);
 	if (mm && !IS_ERR(mm)) {
 		unsigned int nwords = 0;
 		do {
@@ -239,7 +239,7 @@ static int proc_pid_wchan(struct seq_fil
 	wchan = get_wchan(task);
 
 	if (lookup_symbol_name(wchan, symname) < 0)
-		if (!ptrace_may_access(task, PTRACE_MODE_READ))
+		if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS))
 			return 0;
 		else
 			return seq_printf(m, "%lu", wchan);
@@ -253,7 +253,7 @@ static int lock_trace(struct task_struct
 	int err = mutex_lock_killable(&task->signal->cred_guard_mutex);
 	if (err)
 		return err;
-	if (!ptrace_may_access(task, PTRACE_MODE_ATTACH)) {
+	if (!ptrace_may_access(task, PTRACE_MODE_ATTACH_FSCREDS)) {
 		mutex_unlock(&task->signal->cred_guard_mutex);
 		return -EPERM;
 	}
@@ -496,7 +496,7 @@ static int proc_fd_access_allowed(struct
 	 */
 	task = get_proc_task(inode);
 	if (task) {
-		allowed = ptrace_may_access(task, PTRACE_MODE_READ);
+		allowed = ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS);
 		put_task_struct(task);
 	}
 	return allowed;
@@ -531,7 +531,7 @@ static bool has_pid_permissions(struct p
 		return true;
 	if (in_group_p(pid->pid_gid))
 		return true;
-	return ptrace_may_access(task, PTRACE_MODE_READ);
+	return ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS);
 }
 
 
@@ -608,7 +608,7 @@ struct mm_struct *proc_mem_open(struct i
 	struct mm_struct *mm = ERR_PTR(-ESRCH);
 
 	if (task) {
-		mm = mm_access(task, mode);
+		mm = mm_access(task, mode | PTRACE_MODE_FSCREDS);
 		put_task_struct(task);
 
 		if (!IS_ERR_OR_NULL(mm)) {
@@ -1670,7 +1670,7 @@ static int map_files_d_revalidate(struct
 	if (!task)
 		goto out_notask;
 
-	mm = mm_access(task, PTRACE_MODE_READ);
+	mm = mm_access(task, PTRACE_MODE_READ_FSCREDS);
 	if (IS_ERR_OR_NULL(mm))
 		goto out;
 
@@ -1802,7 +1802,7 @@ static struct dentry *proc_map_files_loo
 		goto out;
 
 	result = -EACCES;
-	if (!ptrace_may_access(task, PTRACE_MODE_READ))
+	if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS))
 		goto out_put_task;
 
 	result = -ENOENT;
@@ -1859,7 +1859,7 @@ proc_map_files_readdir(struct file *file
 		goto out;
 
 	ret = -EACCES;
-	if (!ptrace_may_access(task, PTRACE_MODE_READ))
+	if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS))
 		goto out_put_task;
 
 	ret = 0;
@@ -2338,7 +2338,7 @@ static int do_io_accounting(struct task_
 	if (result)
 		return result;
 
-	if (!ptrace_may_access(task, PTRACE_MODE_READ)) {
+	if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS)) {
 		result = -EACCES;
 		goto out_unlock;
 	}
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/proc/namespaces.c linux-libre-3.18.31-gnu/fs/proc/namespaces.c
--- linux-libre-3.18.30-gnu/fs/proc/namespaces.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/proc/namespaces.c	2016-04-19 07:57:18.000000000 -0400
@@ -119,7 +119,7 @@ static void *proc_ns_follow_link(struct
 	if (!task)
 		goto out;
 
-	if (!ptrace_may_access(task, PTRACE_MODE_READ))
+	if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS))
 		goto out_put_task;
 
 	ns_path.dentry = proc_ns_get_dentry(sb, task, ei->ns.ns_ops);
@@ -152,7 +152,7 @@ static int proc_ns_readlink(struct dentr
 	if (!task)
 		goto out;
 
-	if (!ptrace_may_access(task, PTRACE_MODE_READ))
+	if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS))
 		goto out_put_task;
 
 	res = -ENOENT;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/quota/dquot.c linux-libre-3.18.31-gnu/fs/quota/dquot.c
--- linux-libre-3.18.30-gnu/fs/quota/dquot.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/quota/dquot.c	2016-04-19 07:57:18.000000000 -0400
@@ -1384,7 +1384,7 @@ static int dquot_active(const struct ino
 static void __dquot_initialize(struct inode *inode, int type)
 {
 	int cnt, init_needed = 0;
-	struct dquot *got[MAXQUOTAS];
+	struct dquot *got[MAXQUOTAS] = {};
 	struct super_block *sb = inode->i_sb;
 	qsize_t rsv;
 
@@ -1394,7 +1394,6 @@ static void __dquot_initialize(struct in
 	/* First get references to structures we might need. */
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		struct kqid qid;
-		got[cnt] = NULL;
 		if (type != -1 && cnt != type)
 			continue;
 		/*
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/splice.c linux-libre-3.18.31-gnu/fs/splice.c
--- linux-libre-3.18.30-gnu/fs/splice.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/splice.c	2016-04-19 07:57:18.000000000 -0400
@@ -186,6 +186,9 @@ ssize_t splice_to_pipe(struct pipe_inode
 	unsigned int spd_pages = spd->nr_pages;
 	int ret, do_wakeup, page_nr;
 
+	if (!spd_pages)
+		return 0;
+
 	ret = 0;
 	do_wakeup = 0;
 	page_nr = 0;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/fs/xfs/xfs_attr_list.c linux-libre-3.18.31-gnu/fs/xfs/xfs_attr_list.c
--- linux-libre-3.18.30-gnu/fs/xfs/xfs_attr_list.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/fs/xfs/xfs_attr_list.c	2016-04-19 07:57:18.000000000 -0400
@@ -205,8 +205,10 @@ xfs_attr_shortform_list(xfs_attr_list_co
 					sbp->namelen,
 					sbp->valuelen,
 					&sbp->name[sbp->namelen]);
-		if (error)
+		if (error) {
+			kmem_free(sbuf);
 			return error;
+		}
 		if (context->seen_enough)
 			break;
 		cursor->offset++;
@@ -454,14 +456,13 @@ xfs_attr3_leaf_list_int(
 				args.rmtblkcnt = xfs_attr3_rmt_blocks(
 							args.dp->i_mount, valuelen);
 				retval = xfs_attr_rmtval_get(&args);
-				if (retval)
-					return retval;
-				retval = context->put_listent(context,
-						entry->flags,
-						name_rmt->name,
-						(int)name_rmt->namelen,
-						valuelen,
-						args.value);
+				if (!retval)
+					retval = context->put_listent(context,
+							entry->flags,
+							name_rmt->name,
+							(int)name_rmt->namelen,
+							valuelen,
+							args.value);
 				kmem_free(args.value);
 			} else {
 				retval = context->put_listent(context,
diff -druNp --no-dereference linux-libre-3.18.30-gnu/include/asm-generic/bitops/lock.h linux-libre-3.18.31-gnu/include/asm-generic/bitops/lock.h
--- linux-libre-3.18.30-gnu/include/asm-generic/bitops/lock.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/include/asm-generic/bitops/lock.h	2016-04-19 07:57:18.000000000 -0400
@@ -29,16 +29,16 @@ do {					\
  * @nr: the bit to set
  * @addr: the address to start counting from
  *
- * This operation is like clear_bit_unlock, however it is not atomic.
- * It does provide release barrier semantics so it can be used to unlock
- * a bit lock, however it would only be used if no other CPU can modify
- * any bits in the memory until the lock is released (a good example is
- * if the bit lock itself protects access to the other bits in the word).
+ * A weaker form of clear_bit_unlock() as used by __bit_lock_unlock(). If all
+ * the bits in the word are protected by this lock some archs can use weaker
+ * ops to safely unlock.
+ *
+ * See for example x86's implementation.
  */
 #define __clear_bit_unlock(nr, addr)	\
 do {					\
-	smp_mb();			\
-	__clear_bit(nr, addr);		\
+	smp_mb__before_atomic();	\
+	clear_bit(nr, addr);		\
 } while (0)
 
 #endif /* _ASM_GENERIC_BITOPS_LOCK_H_ */
diff -druNp --no-dereference linux-libre-3.18.30-gnu/include/drm/drm_dp_mst_helper.h linux-libre-3.18.31-gnu/include/drm/drm_dp_mst_helper.h
--- linux-libre-3.18.30-gnu/include/drm/drm_dp_mst_helper.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/include/drm/drm_dp_mst_helper.h	2016-04-19 07:57:18.000000000 -0400
@@ -44,8 +44,6 @@ struct drm_dp_vcpi {
 /**
  * struct drm_dp_mst_port - MST port
  * @kref: reference count for this port.
- * @guid_valid: for DP 1.2 devices if we have validated the GUID.
- * @guid: guid for DP 1.2 device on this port.
  * @port_num: port number
  * @input: if this port is an input port.
  * @mcs: message capability status - DP 1.2 spec.
@@ -70,10 +68,6 @@ struct drm_dp_vcpi {
 struct drm_dp_mst_port {
 	struct kref kref;
 
-	/* if dpcd 1.2 device is on this port - its GUID info */
-	bool guid_valid;
-	u8 guid[16];
-
 	u8 port_num;
 	bool input;
 	bool mcs;
@@ -107,10 +101,12 @@ struct drm_dp_mst_port {
  * @tx_slots: transmission slots for this device.
  * @last_seqno: last sequence number used to talk to this.
  * @link_address_sent: if a link address message has been sent to this device yet.
+ * @guid: guid for DP 1.2 branch device. port under this branch can be
+ * identified by port #.
  *
  * This structure represents an MST branch device, there is one
- * primary branch device at the root, along with any others connected
- * to downstream ports
+ * primary branch device at the root, along with any other branches connected
+ * to downstream port of parent branches.
  */
 struct drm_dp_mst_branch {
 	struct kref kref;
@@ -129,6 +125,9 @@ struct drm_dp_mst_branch {
 	struct drm_dp_sideband_msg_tx *tx_slots[2];
 	int last_seqno;
 	bool link_address_sent;
+
+	/* global unique identifier to identify branch devices */
+	u8 guid[16];
 };
 
 
@@ -401,11 +400,9 @@ struct drm_dp_payload {
  * @conn_base_id: DRM connector ID this mgr is connected to.
  * @down_rep_recv: msg receiver state for down replies.
  * @up_req_recv: msg receiver state for up requests.
- * @lock: protects mst state, primary, guid, dpcd.
+ * @lock: protects mst state, primary, dpcd.
  * @mst_state: if this manager is enabled for an MST capable port.
  * @mst_primary: pointer to the primary branch device.
- * @guid_valid: GUID valid for the primary branch device.
- * @guid: GUID for primary port.
  * @dpcd: cache of DPCD for primary port.
  * @pbn_div: PBN to slots divisor.
  *
@@ -427,13 +424,11 @@ struct drm_dp_mst_topology_mgr {
 	struct drm_dp_sideband_msg_rx up_req_recv;
 
 	/* pointer to info about the initial MST device */
-	struct mutex lock; /* protects mst_state + primary + guid + dpcd */
+	struct mutex lock; /* protects mst_state + primary + dpcd */
 
 	bool mst_state;
 	struct drm_dp_mst_branch *mst_primary;
-	/* primary MST device GUID */
-	bool guid_valid;
-	u8 guid[16];
+
 	u8 dpcd[DP_RECEIVER_CAP_SIZE];
 	u8 sink_count;
 	int pbn_div;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/include/linux/efi.h linux-libre-3.18.31-gnu/include/linux/efi.h
--- linux-libre-3.18.30-gnu/include/linux/efi.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/include/linux/efi.h	2016-04-19 07:57:18.000000000 -0400
@@ -1155,7 +1155,10 @@ int efivar_entry_iter(int (*func)(struct
 struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid,
 				       struct list_head *head, bool remove);
 
-bool efivar_validate(efi_char16_t *var_name, u8 *data, unsigned long len);
+bool efivar_validate(efi_guid_t vendor, efi_char16_t *var_name, u8 *data,
+		     unsigned long data_size);
+bool efivar_variable_is_removable(efi_guid_t vendor, const char *name,
+				  size_t len);
 
 extern struct work_struct efivar_work;
 void efivar_run_worker(void);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/include/linux/fs.h linux-libre-3.18.31-gnu/include/linux/fs.h
--- linux-libre-3.18.30-gnu/include/linux/fs.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/include/linux/fs.h	2016-04-19 07:57:18.000000000 -0400
@@ -2067,7 +2067,7 @@ extern long do_sys_open(int dfd, const c
 extern struct file *file_open_name(struct filename *, int, umode_t);
 extern struct file *filp_open(const char *, int, umode_t);
 extern struct file *file_open_root(struct dentry *, struct vfsmount *,
-				   const char *, int);
+				   const char *, int, umode_t);
 extern struct file * dentry_open(const struct path *, int, const struct cred *);
 extern int filp_close(struct file *, fl_owner_t id);
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/include/linux/kernel.h linux-libre-3.18.31-gnu/include/linux/kernel.h
--- linux-libre-3.18.30-gnu/include/linux/kernel.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/include/linux/kernel.h	2016-04-19 07:57:18.000000000 -0400
@@ -590,7 +590,7 @@ do {							\
 
 #define do_trace_printk(fmt, args...)					\
 do {									\
-	static const char *trace_printk_fmt				\
+	static const char *trace_printk_fmt __used			\
 		__attribute__((section("__trace_printk_fmt"))) =	\
 		__builtin_constant_p(fmt) ? fmt : NULL;			\
 									\
@@ -634,7 +634,7 @@ int __trace_printk(unsigned long ip, con
  */
 
 #define trace_puts(str) ({						\
-	static const char *trace_printk_fmt				\
+	static const char *trace_printk_fmt __used			\
 		__attribute__((section("__trace_printk_fmt"))) =	\
 		__builtin_constant_p(str) ? str : NULL;			\
 									\
@@ -656,7 +656,7 @@ extern void trace_dump_stack(int skip);
 #define ftrace_vprintk(fmt, vargs)					\
 do {									\
 	if (__builtin_constant_p(fmt)) {				\
-		static const char *trace_printk_fmt			\
+		static const char *trace_printk_fmt __used		\
 		  __attribute__((section("__trace_printk_fmt"))) =	\
 			__builtin_constant_p(fmt) ? fmt : NULL;		\
 									\
diff -druNp --no-dereference linux-libre-3.18.30-gnu/include/linux/mm.h linux-libre-3.18.31-gnu/include/linux/mm.h
--- linux-libre-3.18.30-gnu/include/linux/mm.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/include/linux/mm.h	2016-04-19 07:57:18.000000000 -0400
@@ -598,7 +598,7 @@ static inline compound_page_dtor *get_co
 	return (compound_page_dtor *)page[1].lru.next;
 }
 
-static inline int compound_order(struct page *page)
+static inline unsigned int compound_order(struct page *page)
 {
 	if (!PageHead(page))
 		return 0;
@@ -1730,7 +1730,8 @@ extern void si_meminfo(struct sysinfo *
 extern void si_meminfo_node(struct sysinfo *val, int nid);
 
 extern __printf(3, 4)
-void warn_alloc_failed(gfp_t gfp_mask, int order, const char *fmt, ...);
+void warn_alloc_failed(gfp_t gfp_mask, unsigned int order,
+		const char *fmt, ...);
 
 extern void setup_per_cpu_pageset(void);
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/include/linux/module.h linux-libre-3.18.31-gnu/include/linux/module.h
--- linux-libre-3.18.30-gnu/include/linux/module.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/include/linux/module.h	2016-04-19 07:57:18.000000000 -0400
@@ -224,6 +224,12 @@ struct module_ref {
 	unsigned long decs;
 } __attribute((aligned(2 * sizeof(unsigned long))));
 
+struct mod_kallsyms {
+	Elf_Sym *symtab;
+	unsigned int num_symtab;
+	char *strtab;
+};
+
 struct module {
 	enum module_state state;
 
@@ -311,14 +317,9 @@ struct module {
 #endif
 
 #ifdef CONFIG_KALLSYMS
-	/*
-	 * We keep the symbol and string tables for kallsyms.
-	 * The core_* fields below are temporary, loader-only (they
-	 * could really be discarded after module init).
-	 */
-	Elf_Sym *symtab, *core_symtab;
-	unsigned int num_symtab, core_num_syms;
-	char *strtab, *core_strtab;
+	/* Protected by RCU and/or module_mutex: use rcu_dereference() */
+	struct mod_kallsyms *kallsyms;
+	struct mod_kallsyms core_kallsyms;
 
 	/* Section attributes */
 	struct module_sect_attrs *sect_attrs;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/include/linux/pageblock-flags.h linux-libre-3.18.31-gnu/include/linux/pageblock-flags.h
--- linux-libre-3.18.30-gnu/include/linux/pageblock-flags.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/include/linux/pageblock-flags.h	2016-04-19 07:57:18.000000000 -0400
@@ -44,7 +44,7 @@ enum pageblock_bits {
 #ifdef CONFIG_HUGETLB_PAGE_SIZE_VARIABLE
 
 /* Huge page sizes are variable */
-extern int pageblock_order;
+extern unsigned int pageblock_order;
 
 #else /* CONFIG_HUGETLB_PAGE_SIZE_VARIABLE */
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/include/linux/pci.h linux-libre-3.18.31-gnu/include/linux/pci.h
--- linux-libre-3.18.30-gnu/include/linux/pci.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/include/linux/pci.h	2016-04-19 07:57:18.000000000 -0400
@@ -355,6 +355,9 @@ struct pci_dev {
 	unsigned int	__aer_firmware_first:1;
 	unsigned int	broken_intx_masking:1;
 	unsigned int	io_window_1k:1;	/* Intel P2P bridge 1K I/O windows */
+	unsigned int	irq_managed:1;
+	unsigned int	has_secondary_link:1;
+	unsigned int	non_compliant_bars:1;	/* broken BARs; ignore them */
 	pci_dev_flags_t dev_flags;
 	atomic_t	enable_cnt;	/* pci_enable_device has been called */
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/include/linux/poison.h linux-libre-3.18.31-gnu/include/linux/poison.h
--- linux-libre-3.18.30-gnu/include/linux/poison.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/include/linux/poison.h	2016-04-19 07:57:18.000000000 -0400
@@ -19,8 +19,8 @@
  * under normal circumstances, used to verify that nobody uses
  * non-initialized list entries.
  */
-#define LIST_POISON1  ((void *) 0x00100100 + POISON_POINTER_DELTA)
-#define LIST_POISON2  ((void *) 0x00200200 + POISON_POINTER_DELTA)
+#define LIST_POISON1  ((void *) 0x100 + POISON_POINTER_DELTA)
+#define LIST_POISON2  ((void *) 0x200 + POISON_POINTER_DELTA)
 
 /********** include/linux/timer.h **********/
 /*
diff -druNp --no-dereference linux-libre-3.18.30-gnu/include/linux/ptrace.h linux-libre-3.18.31-gnu/include/linux/ptrace.h
--- linux-libre-3.18.30-gnu/include/linux/ptrace.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/include/linux/ptrace.h	2016-04-19 07:57:18.000000000 -0400
@@ -56,7 +56,29 @@ extern void exit_ptrace(struct task_stru
 #define PTRACE_MODE_READ	0x01
 #define PTRACE_MODE_ATTACH	0x02
 #define PTRACE_MODE_NOAUDIT	0x04
-/* Returns true on success, false on denial. */
+#define PTRACE_MODE_FSCREDS 0x08
+#define PTRACE_MODE_REALCREDS 0x10
+
+/* shorthands for READ/ATTACH and FSCREDS/REALCREDS combinations */
+#define PTRACE_MODE_READ_FSCREDS (PTRACE_MODE_READ | PTRACE_MODE_FSCREDS)
+#define PTRACE_MODE_READ_REALCREDS (PTRACE_MODE_READ | PTRACE_MODE_REALCREDS)
+#define PTRACE_MODE_ATTACH_FSCREDS (PTRACE_MODE_ATTACH | PTRACE_MODE_FSCREDS)
+#define PTRACE_MODE_ATTACH_REALCREDS (PTRACE_MODE_ATTACH | PTRACE_MODE_REALCREDS)
+
+/**
+ * ptrace_may_access - check whether the caller is permitted to access
+ * a target task.
+ * @task: target task
+ * @mode: selects type of access and caller credentials
+ *
+ * Returns true on success, false on denial.
+ *
+ * One of the flags PTRACE_MODE_FSCREDS and PTRACE_MODE_REALCREDS must
+ * be set in @mode to specify whether the access was requested through
+ * a filesystem syscall (should use effective capabilities and fsuid
+ * of the caller) or through an explicit syscall such as
+ * process_vm_writev or ptrace (and should use the real credentials).
+ */
 extern bool ptrace_may_access(struct task_struct *task, unsigned int mode);
 
 static inline int ptrace_reparented(struct task_struct *child)
diff -druNp --no-dereference linux-libre-3.18.30-gnu/include/linux/thermal.h linux-libre-3.18.31-gnu/include/linux/thermal.h
--- linux-libre-3.18.30-gnu/include/linux/thermal.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/include/linux/thermal.h	2016-04-19 07:57:18.000000000 -0400
@@ -175,6 +175,7 @@ struct thermal_attr {
  * @trip_hyst_attrs:	attributes for trip points for sysfs: trip hysteresis
  * @devdata:	private pointer for device private data
  * @trips:	number of trip points the thermal zone supports
+ * @trips_disabled;	bitmap for disabled trips
  * @passive_delay:	number of milliseconds to wait between polls when
  *			performing passive cooling.  Currenty only used by the
  *			step-wise governor
@@ -211,6 +212,7 @@ struct thermal_zone_device {
 	struct thermal_attr *trip_hyst_attrs;
 	void *devdata;
 	int trips;
+	unsigned long trips_disabled;	/* bitmap for disabled trips */
 	int passive_delay;
 	int polling_delay;
 	int temperature;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/include/linux/tty.h linux-libre-3.18.31-gnu/include/linux/tty.h
--- linux-libre-3.18.30-gnu/include/linux/tty.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/include/linux/tty.h	2016-04-19 07:57:18.000000000 -0400
@@ -574,7 +574,7 @@ static inline int tty_ldisc_receive_buf(
 		count = ld->ops->receive_buf2(ld->tty, p, f, count);
 	else {
 		count = min_t(int, count, ld->tty->receive_room);
-		if (count)
+		if (count && ld->ops->receive_buf)
 			ld->ops->receive_buf(ld->tty, p, f, count);
 	}
 	return count;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/include/linux/ucs2_string.h linux-libre-3.18.31-gnu/include/linux/ucs2_string.h
--- linux-libre-3.18.30-gnu/include/linux/ucs2_string.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/include/linux/ucs2_string.h	2016-04-19 07:57:18.000000000 -0400
@@ -11,4 +11,8 @@ unsigned long ucs2_strlen(const ucs2_cha
 unsigned long ucs2_strsize(const ucs2_char_t *data, unsigned long maxlength);
 int ucs2_strncmp(const ucs2_char_t *a, const ucs2_char_t *b, size_t len);
 
+unsigned long ucs2_utf8size(const ucs2_char_t *src);
+unsigned long ucs2_as_utf8(u8 *dest, const ucs2_char_t *src,
+			   unsigned long maxlength);
+
 #endif /* _LINUX_UCS2_STRING_H_ */
diff -druNp --no-dereference linux-libre-3.18.30-gnu/kernel/events/core.c linux-libre-3.18.31-gnu/kernel/events/core.c
--- linux-libre-3.18.30-gnu/kernel/events/core.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/kernel/events/core.c	2016-04-19 07:57:18.000000000 -0400
@@ -3188,7 +3188,7 @@ find_lively_task_by_vpid(pid_t vpid)
 
 	/* Reuse ptrace permission checks for now. */
 	err = -EACCES;
-	if (!ptrace_may_access(task, PTRACE_MODE_READ))
+	if (!ptrace_may_access(task, PTRACE_MODE_READ_REALCREDS))
 		goto errout;
 
 	return task;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/kernel/futex.c linux-libre-3.18.31-gnu/kernel/futex.c
--- linux-libre-3.18.30-gnu/kernel/futex.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/kernel/futex.c	2016-04-19 07:57:18.000000000 -0400
@@ -2763,7 +2763,7 @@ SYSCALL_DEFINE3(get_robust_list, int, pi
 	}
 
 	ret = -EPERM;
-	if (!ptrace_may_access(p, PTRACE_MODE_READ))
+	if (!ptrace_may_access(p, PTRACE_MODE_READ_REALCREDS))
 		goto err_unlock;
 
 	head = p->robust_list;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/kernel/futex_compat.c linux-libre-3.18.31-gnu/kernel/futex_compat.c
--- linux-libre-3.18.30-gnu/kernel/futex_compat.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/kernel/futex_compat.c	2016-04-19 07:57:18.000000000 -0400
@@ -155,7 +155,7 @@ COMPAT_SYSCALL_DEFINE3(get_robust_list,
 	}
 
 	ret = -EPERM;
-	if (!ptrace_may_access(p, PTRACE_MODE_READ))
+	if (!ptrace_may_access(p, PTRACE_MODE_READ_REALCREDS))
 		goto err_unlock;
 
 	head = p->compat_robust_list;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/kernel/kcmp.c linux-libre-3.18.31-gnu/kernel/kcmp.c
--- linux-libre-3.18.30-gnu/kernel/kcmp.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/kernel/kcmp.c	2016-04-19 07:57:18.000000000 -0400
@@ -122,8 +122,8 @@ SYSCALL_DEFINE5(kcmp, pid_t, pid1, pid_t
 			&task2->signal->cred_guard_mutex);
 	if (ret)
 		goto err;
-	if (!ptrace_may_access(task1, PTRACE_MODE_READ) ||
-	    !ptrace_may_access(task2, PTRACE_MODE_READ)) {
+	if (!ptrace_may_access(task1, PTRACE_MODE_READ_REALCREDS) ||
+	    !ptrace_may_access(task2, PTRACE_MODE_READ_REALCREDS)) {
 		ret = -EPERM;
 		goto err_unlock;
 	}
diff -druNp --no-dereference linux-libre-3.18.30-gnu/kernel/module.c linux-libre-3.18.31-gnu/kernel/module.c
--- linux-libre-3.18.30-gnu/kernel/module.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/kernel/module.c	2016-04-19 07:57:18.000000000 -0400
@@ -179,6 +179,9 @@ struct load_info {
 	struct _ddebug *debug;
 	unsigned int num_debug;
 	bool sig_ok;
+#ifdef CONFIG_KALLSYMS
+	unsigned long mod_kallsyms_init_off;
+#endif
 	struct {
 		unsigned int sym, str, mod, vers, info, pcpu;
 	} index;
@@ -2325,8 +2328,20 @@ static void layout_symtab(struct module
 	strsect->sh_entsize = get_offset(mod, &mod->init_size, strsect,
 					 info->index.str) | INIT_OFFSET_MASK;
 	pr_debug("\t%s\n", info->secstrings + strsect->sh_name);
+
+	/* We'll tack temporary mod_kallsyms on the end. */
+	mod->init_size = ALIGN(mod->init_size,
+			       __alignof__(struct mod_kallsyms));
+	info->mod_kallsyms_init_off = mod->init_size;
+	mod->init_size += sizeof(struct mod_kallsyms);
+	mod->init_size = debug_align(mod->init_size);
 }
 
+/*
+ * We use the full symtab and strtab which layout_symtab arranged to
+ * be appended to the init section.  Later we switch to the cut-down
+ * core-only ones.
+ */
 static void add_kallsyms(struct module *mod, const struct load_info *info)
 {
 	unsigned int i, ndst;
@@ -2335,28 +2350,33 @@ static void add_kallsyms(struct module *
 	char *s;
 	Elf_Shdr *symsec = &info->sechdrs[info->index.sym];
 
-	mod->symtab = (void *)symsec->sh_addr;
-	mod->num_symtab = symsec->sh_size / sizeof(Elf_Sym);
+	/* Set up to point into init section. */
+	mod->kallsyms = mod->module_init + info->mod_kallsyms_init_off;
+
+	mod->kallsyms->symtab = (void *)symsec->sh_addr;
+	mod->kallsyms->num_symtab = symsec->sh_size / sizeof(Elf_Sym);
 	/* Make sure we get permanent strtab: don't use info->strtab. */
-	mod->strtab = (void *)info->sechdrs[info->index.str].sh_addr;
+	mod->kallsyms->strtab = (void *)info->sechdrs[info->index.str].sh_addr;
 
 	/* Set types up while we still have access to sections. */
-	for (i = 0; i < mod->num_symtab; i++)
-		mod->symtab[i].st_info = elf_type(&mod->symtab[i], info);
+	for (i = 0; i < mod->kallsyms->num_symtab; i++)
+		mod->kallsyms->symtab[i].st_info
+			= elf_type(&mod->kallsyms->symtab[i], info);
 
-	mod->core_symtab = dst = mod->module_core + info->symoffs;
-	mod->core_strtab = s = mod->module_core + info->stroffs;
-	src = mod->symtab;
-	for (ndst = i = 0; i < mod->num_symtab; i++) {
+	/* Now populate the cut down core kallsyms for after init. */
+	mod->core_kallsyms.symtab = dst = mod->module_core + info->symoffs;
+	mod->core_kallsyms.strtab = s = mod->module_core + info->stroffs;
+	src = mod->kallsyms->symtab;
+	for (ndst = i = 0; i < mod->kallsyms->num_symtab; i++) {
 		if (i == 0 ||
 		    is_core_symbol(src+i, info->sechdrs, info->hdr->e_shnum)) {
 			dst[ndst] = src[i];
-			dst[ndst++].st_name = s - mod->core_strtab;
-			s += strlcpy(s, &mod->strtab[src[i].st_name],
+			dst[ndst++].st_name = s - mod->core_kallsyms.strtab;
+			s += strlcpy(s, &mod->kallsyms->strtab[src[i].st_name],
 				     KSYM_NAME_LEN) + 1;
 		}
 	}
-	mod->core_num_syms = ndst;
+	mod->core_kallsyms.num_symtab = ndst;
 }
 #else
 static inline void layout_symtab(struct module *mod, struct load_info *info)
@@ -3076,9 +3096,8 @@ static int do_init_module(struct module
 	module_put(mod);
 	trim_init_extable(mod);
 #ifdef CONFIG_KALLSYMS
-	mod->num_symtab = mod->core_num_syms;
-	mod->symtab = mod->core_symtab;
-	mod->strtab = mod->core_strtab;
+	/* Switch to core kallsyms now init is done: kallsyms may be walking! */
+	rcu_assign_pointer(mod->kallsyms, &mod->core_kallsyms);
 #endif
 	unset_module_init_ro_nx(mod);
 	module_free(mod, mod->module_init);
@@ -3401,6 +3420,11 @@ static inline int is_arm_mapping_symbol(
 	       && (str[2] == '\0' || str[2] == '.');
 }
 
+static const char *symname(struct mod_kallsyms *kallsyms, unsigned int symnum)
+{
+	return kallsyms->strtab + kallsyms->symtab[symnum].st_name;
+}
+
 static const char *get_ksymbol(struct module *mod,
 			       unsigned long addr,
 			       unsigned long *size,
@@ -3408,6 +3432,7 @@ static const char *get_ksymbol(struct mo
 {
 	unsigned int i, best = 0;
 	unsigned long nextval;
+	struct mod_kallsyms *kallsyms = rcu_dereference_sched(mod->kallsyms);
 
 	/* At worse, next value is at end of module */
 	if (within_module_init(addr, mod))
@@ -3417,32 +3442,32 @@ static const char *get_ksymbol(struct mo
 
 	/* Scan for closest preceding symbol, and next symbol. (ELF
 	   starts real symbols at 1). */
-	for (i = 1; i < mod->num_symtab; i++) {
-		if (mod->symtab[i].st_shndx == SHN_UNDEF)
+	for (i = 1; i < kallsyms->num_symtab; i++) {
+		if (kallsyms->symtab[i].st_shndx == SHN_UNDEF)
 			continue;
 
 		/* We ignore unnamed symbols: they're uninformative
 		 * and inserted at a whim. */
-		if (mod->symtab[i].st_value <= addr
-		    && mod->symtab[i].st_value > mod->symtab[best].st_value
-		    && *(mod->strtab + mod->symtab[i].st_name) != '\0'
-		    && !is_arm_mapping_symbol(mod->strtab + mod->symtab[i].st_name))
+		if (*symname(kallsyms, i) == '\0'
+		    || is_arm_mapping_symbol(symname(kallsyms, i)))
+			continue;
+
+		if (kallsyms->symtab[i].st_value <= addr
+		    && kallsyms->symtab[i].st_value > kallsyms->symtab[best].st_value)
 			best = i;
-		if (mod->symtab[i].st_value > addr
-		    && mod->symtab[i].st_value < nextval
-		    && *(mod->strtab + mod->symtab[i].st_name) != '\0'
-		    && !is_arm_mapping_symbol(mod->strtab + mod->symtab[i].st_name))
-			nextval = mod->symtab[i].st_value;
+		if (kallsyms->symtab[i].st_value > addr
+		    && kallsyms->symtab[i].st_value < nextval)
+			nextval = kallsyms->symtab[i].st_value;
 	}
 
 	if (!best)
 		return NULL;
 
 	if (size)
-		*size = nextval - mod->symtab[best].st_value;
+		*size = nextval - kallsyms->symtab[best].st_value;
 	if (offset)
-		*offset = addr - mod->symtab[best].st_value;
-	return mod->strtab + mod->symtab[best].st_name;
+		*offset = addr - kallsyms->symtab[best].st_value;
+	return symname(kallsyms, best);
 }
 
 /* For kallsyms to ask for address resolution.  NULL means not found.  Careful
@@ -3535,19 +3560,21 @@ int module_get_kallsym(unsigned int symn
 
 	preempt_disable();
 	list_for_each_entry_rcu(mod, &modules, list) {
+		struct mod_kallsyms *kallsyms;
+
 		if (mod->state == MODULE_STATE_UNFORMED)
 			continue;
-		if (symnum < mod->num_symtab) {
-			*value = mod->symtab[symnum].st_value;
-			*type = mod->symtab[symnum].st_info;
-			strlcpy(name, mod->strtab + mod->symtab[symnum].st_name,
-				KSYM_NAME_LEN);
+		kallsyms = rcu_dereference_sched(mod->kallsyms);
+		if (symnum < kallsyms->num_symtab) {
+			*value = kallsyms->symtab[symnum].st_value;
+			*type = kallsyms->symtab[symnum].st_info;
+			strlcpy(name, symname(kallsyms, symnum), KSYM_NAME_LEN);
 			strlcpy(module_name, mod->name, MODULE_NAME_LEN);
 			*exported = is_exported(name, *value, mod);
 			preempt_enable();
 			return 0;
 		}
-		symnum -= mod->num_symtab;
+		symnum -= kallsyms->num_symtab;
 	}
 	preempt_enable();
 	return -ERANGE;
@@ -3556,11 +3583,12 @@ int module_get_kallsym(unsigned int symn
 static unsigned long mod_find_symname(struct module *mod, const char *name)
 {
 	unsigned int i;
+	struct mod_kallsyms *kallsyms = rcu_dereference_sched(mod->kallsyms);
 
-	for (i = 0; i < mod->num_symtab; i++)
-		if (strcmp(name, mod->strtab+mod->symtab[i].st_name) == 0 &&
-		    mod->symtab[i].st_info != 'U')
-			return mod->symtab[i].st_value;
+	for (i = 0; i < kallsyms->num_symtab; i++)
+		if (strcmp(name, symname(kallsyms, i)) == 0 &&
+		    kallsyms->symtab[i].st_info != 'U')
+			return kallsyms->symtab[i].st_value;
 	return 0;
 }
 
@@ -3597,11 +3625,14 @@ int module_kallsyms_on_each_symbol(int (
 	int ret;
 
 	list_for_each_entry(mod, &modules, list) {
+		/* We hold module_mutex: no need for rcu_dereference_sched */
+		struct mod_kallsyms *kallsyms = mod->kallsyms;
+
 		if (mod->state == MODULE_STATE_UNFORMED)
 			continue;
-		for (i = 0; i < mod->num_symtab; i++) {
-			ret = fn(data, mod->strtab + mod->symtab[i].st_name,
-				 mod, mod->symtab[i].st_value);
+		for (i = 0; i < kallsyms->num_symtab; i++) {
+			ret = fn(data, symname(kallsyms, i),
+				 mod, kallsyms->symtab[i].st_value);
 			if (ret != 0)
 				return ret;
 		}
diff -druNp --no-dereference linux-libre-3.18.30-gnu/kernel/ptrace.c linux-libre-3.18.31-gnu/kernel/ptrace.c
--- linux-libre-3.18.30-gnu/kernel/ptrace.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/kernel/ptrace.c	2016-04-19 07:57:18.000000000 -0400
@@ -219,6 +219,14 @@ static int ptrace_has_cap(struct user_na
 static int __ptrace_may_access(struct task_struct *task, unsigned int mode)
 {
 	const struct cred *cred = current_cred(), *tcred;
+	int dumpable = 0;
+	kuid_t caller_uid;
+	kgid_t caller_gid;
+
+	if (!(mode & PTRACE_MODE_FSCREDS) == !(mode & PTRACE_MODE_REALCREDS)) {
+		WARN(1, "denying ptrace access check without PTRACE_MODE_*CREDS\n");
+		return -EPERM;
+	}
 
 	/* May we inspect the given task?
 	 * This check is used both for attaching with ptrace
@@ -228,18 +236,33 @@ static int __ptrace_may_access(struct ta
 	 * because setting up the necessary parent/child relationship
 	 * or halting the specified task is impossible.
 	 */
-	int dumpable = 0;
+
 	/* Don't let security modules deny introspection */
 	if (same_thread_group(task, current))
 		return 0;
 	rcu_read_lock();
+	if (mode & PTRACE_MODE_FSCREDS) {
+		caller_uid = cred->fsuid;
+		caller_gid = cred->fsgid;
+	} else {
+		/*
+		 * Using the euid would make more sense here, but something
+		 * in userland might rely on the old behavior, and this
+		 * shouldn't be a security problem since
+		 * PTRACE_MODE_REALCREDS implies that the caller explicitly
+		 * used a syscall that requests access to another process
+		 * (and not a filesystem syscall to procfs).
+		 */
+		caller_uid = cred->uid;
+		caller_gid = cred->gid;
+	}
 	tcred = __task_cred(task);
-	if (uid_eq(cred->uid, tcred->euid) &&
-	    uid_eq(cred->uid, tcred->suid) &&
-	    uid_eq(cred->uid, tcred->uid)  &&
-	    gid_eq(cred->gid, tcred->egid) &&
-	    gid_eq(cred->gid, tcred->sgid) &&
-	    gid_eq(cred->gid, tcred->gid))
+	if (uid_eq(caller_uid, tcred->euid) &&
+	    uid_eq(caller_uid, tcred->suid) &&
+	    uid_eq(caller_uid, tcred->uid)  &&
+	    gid_eq(caller_gid, tcred->egid) &&
+	    gid_eq(caller_gid, tcred->sgid) &&
+	    gid_eq(caller_gid, tcred->gid))
 		goto ok;
 	if (ptrace_has_cap(tcred->user_ns, mode))
 		goto ok;
@@ -306,7 +329,7 @@ static int ptrace_attach(struct task_str
 		goto out;
 
 	task_lock(task);
-	retval = __ptrace_may_access(task, PTRACE_MODE_ATTACH);
+	retval = __ptrace_may_access(task, PTRACE_MODE_ATTACH_REALCREDS);
 	task_unlock(task);
 	if (retval)
 		goto unlock_creds;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/kernel/resource.c linux-libre-3.18.31-gnu/kernel/resource.c
--- linux-libre-3.18.30-gnu/kernel/resource.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/kernel/resource.c	2016-04-19 07:57:18.000000000 -0400
@@ -1073,9 +1073,10 @@ struct resource * __request_region(struc
 		if (!conflict)
 			break;
 		if (conflict != parent) {
-			parent = conflict;
-			if (!(conflict->flags & IORESOURCE_BUSY))
+			if (!(conflict->flags & IORESOURCE_BUSY)) {
+				parent = conflict;
 				continue;
+			}
 		}
 		if (conflict->flags & flags & IORESOURCE_MUXED) {
 			add_wait_queue(&muxed_resource_wait, &wait);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/kernel/sched/core.c linux-libre-3.18.31-gnu/kernel/sched/core.c
--- linux-libre-3.18.30-gnu/kernel/sched/core.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/kernel/sched/core.c	2016-04-19 07:57:18.000000000 -0400
@@ -6416,7 +6416,7 @@ static void sched_init_numa(void)
 
 			sched_domains_numa_masks[i][j] = mask;
 
-			for (k = 0; k < nr_node_ids; k++) {
+			for_each_node(k) {
 				if (node_distance(j, k) > sched_domains_numa_distance[i])
 					continue;
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/kernel/sched/cputime.c linux-libre-3.18.31-gnu/kernel/sched/cputime.c
--- linux-libre-3.18.30-gnu/kernel/sched/cputime.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/kernel/sched/cputime.c	2016-04-19 07:57:18.000000000 -0400
@@ -259,21 +259,21 @@ static __always_inline bool steal_accoun
 #ifdef CONFIG_PARAVIRT
 	if (static_key_false(&paravirt_steal_enabled)) {
 		u64 steal;
-		cputime_t steal_ct;
+		unsigned long steal_jiffies;
 
 		steal = paravirt_steal_clock(smp_processor_id());
 		steal -= this_rq()->prev_steal_time;
 
 		/*
-		 * cputime_t may be less precise than nsecs (eg: if it's
-		 * based on jiffies). Lets cast the result to cputime
+		 * steal is in nsecs but our caller is expecting steal
+		 * time in jiffies. Lets cast the result to jiffies
 		 * granularity and account the rest on the next rounds.
 		 */
-		steal_ct = nsecs_to_cputime(steal);
-		this_rq()->prev_steal_time += cputime_to_nsecs(steal_ct);
+		steal_jiffies = nsecs_to_jiffies(steal);
+		this_rq()->prev_steal_time += jiffies_to_nsecs(steal_jiffies);
 
-		account_steal_time(steal_ct);
-		return steal_ct;
+		account_steal_time(jiffies_to_cputime(steal_jiffies));
+		return steal_jiffies;
 	}
 #endif
 	return false;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/kernel/sysctl_binary.c linux-libre-3.18.31-gnu/kernel/sysctl_binary.c
--- linux-libre-3.18.30-gnu/kernel/sysctl_binary.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/kernel/sysctl_binary.c	2016-04-19 07:57:18.000000000 -0400
@@ -1320,7 +1320,7 @@ static ssize_t binary_sysctl(const int *
 	}
 
 	mnt = task_active_pid_ns(current)->proc_mnt;
-	file = file_open_root(mnt->mnt_root, mnt, pathname, flags);
+	file = file_open_root(mnt->mnt_root, mnt, pathname, flags, 0);
 	result = PTR_ERR(file);
 	if (IS_ERR(file))
 		goto out_putname;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/kernel/trace/trace.c linux-libre-3.18.31-gnu/kernel/trace/trace.c
--- linux-libre-3.18.30-gnu/kernel/trace/trace.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/kernel/trace/trace.c	2016-04-19 07:57:18.000000000 -0400
@@ -4679,7 +4679,10 @@ static ssize_t tracing_splice_read_pipe(
 
 	spd.nr_pages = i;
 
-	ret = splice_to_pipe(pipe, &spd);
+	if (i)
+		ret = splice_to_pipe(pipe, &spd);
+	else
+		ret = 0;
 out:
 	splice_shrink_spd(&spd);
 	return ret;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/kernel/trace/trace_printk.c linux-libre-3.18.31-gnu/kernel/trace/trace_printk.c
--- linux-libre-3.18.30-gnu/kernel/trace/trace_printk.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/kernel/trace/trace_printk.c	2016-04-19 07:57:18.000000000 -0400
@@ -291,6 +291,9 @@ static int t_show(struct seq_file *m, vo
 	const char *str = *fmt;
 	int i;
 
+	if (!*fmt)
+		return 0;
+
 	seq_printf(m, "0x%lx : \"", *(unsigned long *)fmt);
 
 	/*
diff -druNp --no-dereference linux-libre-3.18.30-gnu/lib/ucs2_string.c linux-libre-3.18.31-gnu/lib/ucs2_string.c
--- linux-libre-3.18.30-gnu/lib/ucs2_string.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/lib/ucs2_string.c	2016-04-19 07:57:18.000000000 -0400
@@ -49,3 +49,65 @@ ucs2_strncmp(const ucs2_char_t *a, const
         }
 }
 EXPORT_SYMBOL(ucs2_strncmp);
+
+unsigned long
+ucs2_utf8size(const ucs2_char_t *src)
+{
+	unsigned long i;
+	unsigned long j = 0;
+
+	for (i = 0; i < ucs2_strlen(src); i++) {
+		u16 c = src[i];
+
+		if (c >= 0x800)
+			j += 3;
+		else if (c >= 0x80)
+			j += 2;
+		else
+			j += 1;
+	}
+
+	return j;
+}
+EXPORT_SYMBOL(ucs2_utf8size);
+
+/*
+ * copy at most maxlength bytes of whole utf8 characters to dest from the
+ * ucs2 string src.
+ *
+ * The return value is the number of characters copied, not including the
+ * final NUL character.
+ */
+unsigned long
+ucs2_as_utf8(u8 *dest, const ucs2_char_t *src, unsigned long maxlength)
+{
+	unsigned int i;
+	unsigned long j = 0;
+	unsigned long limit = ucs2_strnlen(src, maxlength);
+
+	for (i = 0; maxlength && i < limit; i++) {
+		u16 c = src[i];
+
+		if (c >= 0x800) {
+			if (maxlength < 3)
+				break;
+			maxlength -= 3;
+			dest[j++] = 0xe0 | (c & 0xf000) >> 12;
+			dest[j++] = 0x80 | (c & 0x0fc0) >> 6;
+			dest[j++] = 0x80 | (c & 0x003f);
+		} else if (c >= 0x80) {
+			if (maxlength < 2)
+				break;
+			maxlength -= 2;
+			dest[j++] = 0xc0 | (c & 0x7c0) >> 6;
+			dest[j++] = 0x80 | (c & 0x03f);
+		} else {
+			maxlength -= 1;
+			dest[j++] = c & 0x7f;
+		}
+	}
+	if (maxlength)
+		dest[j] = '\0';
+	return j;
+}
+EXPORT_SYMBOL(ucs2_as_utf8);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/MAINTAINERS linux-libre-3.18.31-gnu/MAINTAINERS
--- linux-libre-3.18.30-gnu/MAINTAINERS	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/MAINTAINERS	2016-04-19 07:57:18.000000000 -0400
@@ -9004,10 +9004,12 @@ S:	Maintained
 F:	drivers/net/ethernet/dlink/sundance.c
 
 SUPERH
+M:	Yoshinori Sato <ysato@users.sourceforge.jp>
+M:	Rich Felker <dalias@libc.org>
 L:	linux-sh@vger.kernel.org
 W:	http://www.linux-sh.org
 Q:	http://patchwork.kernel.org/project/linux-sh/list/
-S:	Orphan
+S:	Maintained
 F:	Documentation/sh/
 F:	arch/sh/
 F:	drivers/sh/
diff -druNp --no-dereference linux-libre-3.18.30-gnu/Makefile linux-libre-3.18.31-gnu/Makefile
--- linux-libre-3.18.30-gnu/Makefile	2016-04-06 23:56:02.000000000 -0400
+++ linux-libre-3.18.31-gnu/Makefile	2016-04-21 11:22:41.000000000 -0400
@@ -1,6 +1,6 @@
 VERSION = 3
 PATCHLEVEL = 18
-SUBLEVEL = 30
+SUBLEVEL = 31
 EXTRAVERSION =-gnu
 NAME = Diseased Newt
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/mm/bootmem.c linux-libre-3.18.31-gnu/mm/bootmem.c
--- linux-libre-3.18.30-gnu/mm/bootmem.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/mm/bootmem.c	2016-04-19 07:57:18.000000000 -0400
@@ -164,7 +164,7 @@ void __init free_bootmem_late(unsigned l
 	end = PFN_DOWN(physaddr + size);
 
 	for (; cursor < end; cursor++) {
-		__free_pages_bootmem(pfn_to_page(cursor), 0);
+		__free_pages_bootmem(pfn_to_page(cursor), cursor, 0);
 		totalram_pages++;
 	}
 }
@@ -172,7 +172,7 @@ void __init free_bootmem_late(unsigned l
 static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
 {
 	struct page *page;
-	unsigned long *map, start, end, pages, count = 0;
+	unsigned long *map, start, end, pages, cur, count = 0;
 
 	if (!bdata->node_bootmem_map)
 		return 0;
@@ -210,17 +210,17 @@ static unsigned long __init free_all_boo
 		if (IS_ALIGNED(start, BITS_PER_LONG) && vec == ~0UL) {
 			int order = ilog2(BITS_PER_LONG);
 
-			__free_pages_bootmem(pfn_to_page(start), order);
+			__free_pages_bootmem(pfn_to_page(start), start, order);
 			count += BITS_PER_LONG;
 			start += BITS_PER_LONG;
 		} else {
-			unsigned long cur = start;
+			cur = start;
 
 			start = ALIGN(start + 1, BITS_PER_LONG);
 			while (vec && cur != start) {
 				if (vec & 1) {
 					page = pfn_to_page(cur);
-					__free_pages_bootmem(page, 0);
+					__free_pages_bootmem(page, cur, 0);
 					count++;
 				}
 				vec >>= 1;
@@ -229,12 +229,13 @@ static unsigned long __init free_all_boo
 		}
 	}
 
+	cur = bdata->node_min_pfn;
 	page = virt_to_page(bdata->node_bootmem_map);
 	pages = bdata->node_low_pfn - bdata->node_min_pfn;
 	pages = bootmem_bootmap_pages(pages);
 	count += pages;
 	while (pages--)
-		__free_pages_bootmem(page++, 0);
+		__free_pages_bootmem(page++, cur++, 0);
 
 	bdebug("nid=%td released=%lx\n", bdata - bootmem_node_data, count);
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/mm/hugetlb.c linux-libre-3.18.31-gnu/mm/hugetlb.c
--- linux-libre-3.18.30-gnu/mm/hugetlb.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/mm/hugetlb.c	2016-04-19 07:57:18.000000000 -0400
@@ -681,7 +681,7 @@ static int hstate_next_node_to_free(stru
 
 #if defined(CONFIG_CMA) && defined(CONFIG_X86_64)
 static void destroy_compound_gigantic_page(struct page *page,
-					unsigned long order)
+					unsigned int order)
 {
 	int i;
 	int nr_pages = 1 << order;
@@ -697,7 +697,7 @@ static void destroy_compound_gigantic_pa
 	__ClearPageHead(page);
 }
 
-static void free_gigantic_page(struct page *page, unsigned order)
+static void free_gigantic_page(struct page *page, unsigned int order)
 {
 	free_contig_range(page_to_pfn(page), 1 << order);
 }
@@ -741,7 +741,7 @@ static bool zone_spans_last_pfn(const st
 	return zone_spans_pfn(zone, last_pfn);
 }
 
-static struct page *alloc_gigantic_page(int nid, unsigned order)
+static struct page *alloc_gigantic_page(int nid, unsigned int order)
 {
 	unsigned long nr_pages = 1 << order;
 	unsigned long ret, pfn, flags;
@@ -777,7 +777,7 @@ static struct page *alloc_gigantic_page(
 }
 
 static void prep_new_huge_page(struct hstate *h, struct page *page, int nid);
-static void prep_compound_gigantic_page(struct page *page, unsigned long order);
+static void prep_compound_gigantic_page(struct page *page, unsigned int order);
 
 static struct page *alloc_fresh_gigantic_page_node(struct hstate *h, int nid)
 {
@@ -810,9 +810,9 @@ static int alloc_fresh_gigantic_page(str
 static inline bool gigantic_page_supported(void) { return true; }
 #else
 static inline bool gigantic_page_supported(void) { return false; }
-static inline void free_gigantic_page(struct page *page, unsigned order) { }
+static inline void free_gigantic_page(struct page *page, unsigned int order) { }
 static inline void destroy_compound_gigantic_page(struct page *page,
-						unsigned long order) { }
+						unsigned int order) { }
 static inline int alloc_fresh_gigantic_page(struct hstate *h,
 					nodemask_t *nodes_allowed) { return 0; }
 #endif
@@ -932,7 +932,7 @@ static void prep_new_huge_page(struct hs
 	put_page(page); /* free it into the hugepage allocator */
 }
 
-static void prep_compound_gigantic_page(struct page *page, unsigned long order)
+static void prep_compound_gigantic_page(struct page *page, unsigned int order)
 {
 	int i;
 	int nr_pages = 1 << order;
@@ -1490,7 +1490,8 @@ found:
 	return 1;
 }
 
-static void __init prep_compound_huge_page(struct page *page, int order)
+static void __init prep_compound_huge_page(struct page *page,
+		unsigned int order)
 {
 	if (unlikely(order > (MAX_ORDER - 1)))
 		prep_compound_gigantic_page(page, order);
@@ -2197,7 +2198,7 @@ static int __init hugetlb_init(void)
 module_init(hugetlb_init);
 
 /* Should be called on processing a hugepagesz=... option */
-void __init hugetlb_add_hstate(unsigned order)
+void __init hugetlb_add_hstate(unsigned int order)
 {
 	struct hstate *h;
 	unsigned long i;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/mm/internal.h linux-libre-3.18.31-gnu/mm/internal.h
--- linux-libre-3.18.30-gnu/mm/internal.h	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/mm/internal.h	2016-04-19 07:57:18.000000000 -0400
@@ -133,8 +133,9 @@ __find_buddy_index(unsigned long page_id
 }
 
 extern int __isolate_free_page(struct page *page, unsigned int order);
-extern void __free_pages_bootmem(struct page *page, unsigned int order);
-extern void prep_compound_page(struct page *page, unsigned long order);
+extern void __free_pages_bootmem(struct page *page, unsigned long pfn,
+					unsigned int order);
+extern void prep_compound_page(struct page *page, unsigned int order);
 #ifdef CONFIG_MEMORY_FAILURE
 extern bool is_free_buddy_page(struct page *page);
 #endif
@@ -192,7 +193,7 @@ isolate_migratepages_range(struct compac
  * page cannot be allocated or merged in parallel. Alternatively, it must
  * handle invalid values gracefully, and use page_order_unsafe() below.
  */
-static inline unsigned long page_order(struct page *page)
+static inline unsigned int page_order(struct page *page)
 {
 	/* PageBuddy() must be checked by the caller */
 	return page_private(page);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/mm/memblock.c linux-libre-3.18.31-gnu/mm/memblock.c
--- linux-libre-3.18.30-gnu/mm/memblock.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/mm/memblock.c	2016-04-19 07:57:18.000000000 -0400
@@ -1305,7 +1305,7 @@ void __init __memblock_free_late(phys_ad
 	end = PFN_DOWN(base + size);
 
 	for (; cursor < end; cursor++) {
-		__free_pages_bootmem(pfn_to_page(cursor), 0);
+		__free_pages_bootmem(pfn_to_page(cursor), cursor, 0);
 		totalram_pages++;
 	}
 }
diff -druNp --no-dereference linux-libre-3.18.30-gnu/mm/nobootmem.c linux-libre-3.18.31-gnu/mm/nobootmem.c
--- linux-libre-3.18.30-gnu/mm/nobootmem.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/mm/nobootmem.c	2016-04-19 07:57:18.000000000 -0400
@@ -77,7 +77,7 @@ void __init free_bootmem_late(unsigned l
 	end = PFN_DOWN(addr + size);
 
 	for (; cursor < end; cursor++) {
-		__free_pages_bootmem(pfn_to_page(cursor), 0);
+		__free_pages_bootmem(pfn_to_page(cursor), cursor, 0);
 		totalram_pages++;
 	}
 }
@@ -92,7 +92,7 @@ static void __init __free_pages_memory(u
 		while (start + (1UL << order) > end)
 			order--;
 
-		__free_pages_bootmem(pfn_to_page(start), order);
+		__free_pages_bootmem(pfn_to_page(start), start, order);
 
 		start += (1UL << order);
 	}
diff -druNp --no-dereference linux-libre-3.18.30-gnu/mm/page_alloc.c linux-libre-3.18.31-gnu/mm/page_alloc.c
--- linux-libre-3.18.30-gnu/mm/page_alloc.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/mm/page_alloc.c	2016-04-19 07:57:18.000000000 -0400
@@ -159,7 +159,7 @@ bool pm_suspended_storage(void)
 #endif /* CONFIG_PM_SLEEP */
 
 #ifdef CONFIG_HUGETLB_PAGE_SIZE_VARIABLE
-int pageblock_order __read_mostly;
+unsigned int pageblock_order __read_mostly;
 #endif
 
 static void __free_pages_ok(struct page *page, unsigned int order);
@@ -361,7 +361,7 @@ static void free_compound_page(struct pa
 	__free_pages_ok(page, compound_order(page));
 }
 
-void prep_compound_page(struct page *page, unsigned long order)
+void prep_compound_page(struct page *page, unsigned int order)
 {
 	int i;
 	int nr_pages = 1 << order;
@@ -546,7 +546,9 @@ static inline void __free_one_page(struc
 	unsigned long combined_idx;
 	unsigned long uninitialized_var(buddy_idx);
 	struct page *buddy;
-	int max_order = MAX_ORDER;
+	unsigned int max_order;
+
+	max_order = min_t(unsigned int, MAX_ORDER, pageblock_order + 1);
 
 	VM_BUG_ON(!zone_is_initialized(zone));
 
@@ -555,28 +557,20 @@ static inline void __free_one_page(struc
 			return;
 
 	VM_BUG_ON(migratetype == -1);
-	if (is_migrate_isolate(migratetype)) {
-		/*
-		 * We restrict max order of merging to prevent merge
-		 * between freepages on isolate pageblock and normal
-		 * pageblock. Without this, pageblock isolation
-		 * could cause incorrect freepage accounting.
-		 */
-		max_order = min(MAX_ORDER, pageblock_order + 1);
-	} else {
+	if (likely(!is_migrate_isolate(migratetype)))
 		__mod_zone_freepage_state(zone, 1 << order, migratetype);
-	}
 
-	page_idx = pfn & ((1 << max_order) - 1);
+	page_idx = pfn & ((1 << MAX_ORDER) - 1);
 
 	VM_BUG_ON_PAGE(page_idx & ((1 << order) - 1), page);
 	VM_BUG_ON_PAGE(bad_range(zone, page), page);
 
+continue_merging:
 	while (order < max_order - 1) {
 		buddy_idx = __find_buddy_index(page_idx, order);
 		buddy = page + (buddy_idx - page_idx);
 		if (!page_is_buddy(page, buddy, order))
-			break;
+			goto done_merging;
 		/*
 		 * Our buddy is free or it is CONFIG_DEBUG_PAGEALLOC guard page,
 		 * merge with it and move up one order.
@@ -598,6 +592,32 @@ static inline void __free_one_page(struc
 		page_idx = combined_idx;
 		order++;
 	}
+	if (max_order < MAX_ORDER) {
+		/* If we are here, it means order is >= pageblock_order.
+		 * We want to prevent merge between freepages on isolate
+		 * pageblock and normal pageblock. Without this, pageblock
+		 * isolation could cause incorrect freepage or CMA accounting.
+		 *
+		 * We don't want to hit this code for the more frequent
+		 * low-order merging.
+		 */
+		if (unlikely(has_isolate_pageblock(zone))) {
+			int buddy_mt;
+
+			buddy_idx = __find_buddy_index(page_idx, order);
+			buddy = page + (buddy_idx - page_idx);
+			buddy_mt = get_pageblock_migratetype(buddy);
+
+			if (migratetype != buddy_mt
+					&& (is_migrate_isolate(migratetype) ||
+						is_migrate_isolate(buddy_mt)))
+				goto done_merging;
+		}
+		max_order++;
+		goto continue_merging;
+	}
+
+done_merging:
 	set_page_order(page, order);
 
 	/*
@@ -780,7 +800,8 @@ static void __free_pages_ok(struct page
 	local_irq_restore(flags);
 }
 
-void __init __free_pages_bootmem(struct page *page, unsigned int order)
+void __init __free_pages_bootmem(struct page *page, unsigned long pfn,
+							unsigned int order)
 {
 	unsigned int nr_pages = 1 << order;
 	struct page *p = page;
@@ -993,7 +1014,7 @@ int move_freepages(struct zone *zone,
 			  int migratetype)
 {
 	struct page *page;
-	unsigned long order;
+	unsigned int order;
 	int pages_moved = 0;
 
 #ifndef CONFIG_HOLES_IN_ZONE
@@ -1079,7 +1100,7 @@ static void change_pageblock_range(struc
 static int try_to_steal_freepages(struct zone *zone, struct page *page,
 				  int start_type, int fallback_type)
 {
-	int current_order = page_order(page);
+	unsigned int current_order = page_order(page);
 
 	/*
 	 * When borrowing from MIGRATE_CMA, we need to release the excess
@@ -2142,7 +2163,7 @@ static DEFINE_RATELIMIT_STATE(nopage_rs,
 		DEFAULT_RATELIMIT_INTERVAL,
 		DEFAULT_RATELIMIT_BURST);
 
-void warn_alloc_failed(gfp_t gfp_mask, int order, const char *fmt, ...)
+void warn_alloc_failed(gfp_t gfp_mask, unsigned int order, const char *fmt, ...)
 {
 	unsigned int filter = SHOW_MEM_FILTER_NODES;
 
@@ -2176,7 +2197,7 @@ void warn_alloc_failed(gfp_t gfp_mask, i
 		va_end(args);
 	}
 
-	pr_warn("%s: page allocation failure: order:%d, mode:0x%x\n",
+	pr_warn("%s: page allocation failure: order:%u, mode:0x%x\n",
 		current->comm, order, gfp_mask);
 
 	dump_stack();
@@ -2949,7 +2970,8 @@ void free_kmem_pages(unsigned long addr,
 	}
 }
 
-static void *make_alloc_exact(unsigned long addr, unsigned order, size_t size)
+static void *make_alloc_exact(unsigned long addr, unsigned int order,
+		size_t size)
 {
 	if (addr) {
 		unsigned long alloc_end = addr + (PAGE_SIZE << order);
@@ -3001,7 +3023,7 @@ EXPORT_SYMBOL(alloc_pages_exact);
  */
 void * __meminit alloc_pages_exact_nid(int nid, size_t size, gfp_t gfp_mask)
 {
-	unsigned order = get_order(size);
+	unsigned int order = get_order(size);
 	struct page *p = alloc_pages_node(nid, gfp_mask, order);
 	if (!p)
 		return NULL;
@@ -3300,7 +3322,8 @@ void show_free_areas(unsigned int filter
 	}
 
 	for_each_populated_zone(zone) {
-		unsigned long nr[MAX_ORDER], flags, order, total = 0;
+		unsigned int order;
+		unsigned long nr[MAX_ORDER], flags, total = 0;
 		unsigned char types[MAX_ORDER];
 
 		if (skip_free_areas_node(filter, zone_to_nid(zone)))
@@ -3649,7 +3672,7 @@ static void build_zonelists(pg_data_t *p
 	nodemask_t used_mask;
 	int local_node, prev_node;
 	struct zonelist *zonelist;
-	int order = current_zonelist_order;
+	unsigned int order = current_zonelist_order;
 
 	/* initialize zonelists */
 	for (i = 0; i < MAX_ZONELISTS; i++) {
@@ -6320,7 +6343,8 @@ int alloc_contig_range(unsigned long sta
 		       unsigned migratetype)
 {
 	unsigned long outer_start, outer_end;
-	int ret = 0, order;
+	unsigned int order;
+	int ret = 0;
 
 	struct compact_control cc = {
 		.nr_migratepages = 0,
diff -druNp --no-dereference linux-libre-3.18.30-gnu/mm/process_vm_access.c linux-libre-3.18.31-gnu/mm/process_vm_access.c
--- linux-libre-3.18.30-gnu/mm/process_vm_access.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/mm/process_vm_access.c	2016-04-19 07:57:18.000000000 -0400
@@ -197,7 +197,7 @@ static ssize_t process_vm_rw_core(pid_t
 		goto free_proc_pages;
 	}
 
-	mm = mm_access(task, PTRACE_MODE_ATTACH);
+	mm = mm_access(task, PTRACE_MODE_ATTACH_REALCREDS);
 	if (!mm || IS_ERR(mm)) {
 		rc = IS_ERR(mm) ? PTR_ERR(mm) : -ESRCH;
 		/*
diff -druNp --no-dereference linux-libre-3.18.30-gnu/net/core/datagram.c linux-libre-3.18.31-gnu/net/core/datagram.c
--- linux-libre-3.18.30-gnu/net/core/datagram.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/net/core/datagram.c	2016-04-19 07:57:18.000000000 -0400
@@ -130,6 +130,35 @@ out_noerr:
 	goto out;
 }
 
+static struct sk_buff *skb_set_peeked(struct sk_buff *skb)
+{
+	struct sk_buff *nskb;
+
+	if (skb->peeked)
+		return skb;
+
+	/* We have to unshare an skb before modifying it. */
+	if (!skb_shared(skb))
+		goto done;
+
+	nskb = skb_clone(skb, GFP_ATOMIC);
+	if (!nskb)
+		return ERR_PTR(-ENOMEM);
+
+	skb->prev->next = nskb;
+	skb->next->prev = nskb;
+	nskb->prev = skb->prev;
+	nskb->next = skb->next;
+
+	consume_skb(skb);
+	skb = nskb;
+
+done:
+	skb->peeked = 1;
+
+	return skb;
+}
+
 /**
  *	__skb_recv_datagram - Receive a datagram skbuff
  *	@sk: socket
@@ -164,7 +193,9 @@ out_noerr:
 struct sk_buff *__skb_recv_datagram(struct sock *sk, unsigned int flags,
 				    int *peeked, int *off, int *err)
 {
+	struct sk_buff_head *queue = &sk->sk_receive_queue;
 	struct sk_buff *skb, *last;
+	unsigned long cpu_flags;
 	long timeo;
 	/*
 	 * Caller is allowed not to check sk->sk_err before skb_recv_datagram()
@@ -183,8 +214,6 @@ struct sk_buff *__skb_recv_datagram(stru
 		 * Look at current nfs client by the way...
 		 * However, this function was correct in any case. 8)
 		 */
-		unsigned long cpu_flags;
-		struct sk_buff_head *queue = &sk->sk_receive_queue;
 		int _off = *off;
 
 		last = (struct sk_buff *)queue;
@@ -198,7 +227,12 @@ struct sk_buff *__skb_recv_datagram(stru
 					_off -= skb->len;
 					continue;
 				}
-				skb->peeked = 1;
+
+				skb = skb_set_peeked(skb);
+				error = PTR_ERR(skb);
+				if (IS_ERR(skb))
+					goto unlock_err;
+
 				atomic_inc(&skb->users);
 			} else
 				__skb_unlink(skb, queue);
@@ -222,6 +256,8 @@ struct sk_buff *__skb_recv_datagram(stru
 
 	return NULL;
 
+unlock_err:
+	spin_unlock_irqrestore(&queue->lock, cpu_flags);
 no_packet:
 	*err = error;
 	return NULL;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/scripts/coccinelle/iterators/use_after_iter.cocci linux-libre-3.18.31-gnu/scripts/coccinelle/iterators/use_after_iter.cocci
--- linux-libre-3.18.30-gnu/scripts/coccinelle/iterators/use_after_iter.cocci	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/scripts/coccinelle/iterators/use_after_iter.cocci	2016-04-19 07:57:18.000000000 -0400
@@ -123,7 +123,7 @@ list_remove_head(x,c,...)
 |
 sizeof(<+...c...+>)
 |
-&c->member
+ &c->member
 |
 c = E
 |
diff -druNp --no-dereference linux-libre-3.18.30-gnu/security/commoncap.c linux-libre-3.18.31-gnu/security/commoncap.c
--- linux-libre-3.18.30-gnu/security/commoncap.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/security/commoncap.c	2016-04-19 07:57:18.000000000 -0400
@@ -142,12 +142,17 @@ int cap_ptrace_access_check(struct task_
 {
 	int ret = 0;
 	const struct cred *cred, *child_cred;
+	const kernel_cap_t *caller_caps;
 
 	rcu_read_lock();
 	cred = current_cred();
 	child_cred = __task_cred(child);
+	if (mode & PTRACE_MODE_FSCREDS)
+		caller_caps = &cred->cap_effective;
+	else
+		caller_caps = &cred->cap_permitted;
 	if (cred->user_ns == child_cred->user_ns &&
-	    cap_issubset(child_cred->cap_permitted, cred->cap_permitted))
+	    cap_issubset(child_cred->cap_permitted, *caller_caps))
 		goto out;
 	if (ns_capable(child_cred->user_ns, CAP_SYS_PTRACE))
 		goto out;
diff -druNp --no-dereference linux-libre-3.18.30-gnu/security/keys/encrypted-keys/encrypted.c linux-libre-3.18.31-gnu/security/keys/encrypted-keys/encrypted.c
--- linux-libre-3.18.30-gnu/security/keys/encrypted-keys/encrypted.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/security/keys/encrypted-keys/encrypted.c	2016-04-19 07:57:18.000000000 -0400
@@ -845,6 +845,8 @@ static int encrypted_update(struct key *
 	size_t datalen = prep->datalen;
 	int ret = 0;
 
+	if (test_bit(KEY_FLAG_NEGATIVE, &key->flags))
+		return -ENOKEY;
 	if (datalen <= 0 || datalen > 32767 || !prep->data)
 		return -EINVAL;
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/security/keys/trusted.c linux-libre-3.18.31-gnu/security/keys/trusted.c
--- linux-libre-3.18.30-gnu/security/keys/trusted.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/security/keys/trusted.c	2016-04-19 07:57:18.000000000 -0400
@@ -984,13 +984,16 @@ static void trusted_rcu_free(struct rcu_
  */
 static int trusted_update(struct key *key, struct key_preparsed_payload *prep)
 {
-	struct trusted_key_payload *p = key->payload.data;
+	struct trusted_key_payload *p;
 	struct trusted_key_payload *new_p;
 	struct trusted_key_options *new_o;
 	size_t datalen = prep->datalen;
 	char *datablob;
 	int ret = 0;
 
+	if (test_bit(KEY_FLAG_NEGATIVE, &key->flags))
+		return -ENOKEY;
+	p = key->payload.data;
 	if (!p->migratable)
 		return -EPERM;
 	if (datalen <= 0 || datalen > 32767 || !prep->data)
diff -druNp --no-dereference linux-libre-3.18.30-gnu/security/keys/user_defined.c linux-libre-3.18.31-gnu/security/keys/user_defined.c
--- linux-libre-3.18.30-gnu/security/keys/user_defined.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/security/keys/user_defined.c	2016-04-19 07:57:18.000000000 -0400
@@ -120,7 +120,10 @@ int user_update(struct key *key, struct
 
 	if (ret == 0) {
 		/* attach the new data, displacing the old */
-		zap = key->payload.data;
+		if (!test_bit(KEY_FLAG_NEGATIVE, &key->flags))
+			zap = key->payload.data;
+		else
+			zap = NULL;
 		rcu_assign_keypointer(key, upayload);
 		key->expiry = 0;
 	}
diff -druNp --no-dereference linux-libre-3.18.30-gnu/security/smack/smack_lsm.c linux-libre-3.18.31-gnu/security/smack/smack_lsm.c
--- linux-libre-3.18.30-gnu/security/smack/smack_lsm.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/security/smack/smack_lsm.c	2016-04-19 07:57:18.000000000 -0400
@@ -308,12 +308,10 @@ static int smk_copy_rules(struct list_he
  */
 static inline unsigned int smk_ptrace_mode(unsigned int mode)
 {
-	switch (mode) {
-	case PTRACE_MODE_READ:
-		return MAY_READ;
-	case PTRACE_MODE_ATTACH:
+	if (mode & PTRACE_MODE_ATTACH)
 		return MAY_READWRITE;
-	}
+	if (mode & PTRACE_MODE_READ)
+		return MAY_READ;
 
 	return 0;
 }
diff -druNp --no-dereference linux-libre-3.18.30-gnu/security/yama/yama_lsm.c linux-libre-3.18.31-gnu/security/yama/yama_lsm.c
--- linux-libre-3.18.30-gnu/security/yama/yama_lsm.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/security/yama/yama_lsm.c	2016-04-19 07:57:18.000000000 -0400
@@ -292,7 +292,7 @@ int yama_ptrace_access_check(struct task
 		return rc;
 
 	/* require ptrace target be a child of ptracer on attach */
-	if (mode == PTRACE_MODE_ATTACH) {
+	if (mode & PTRACE_MODE_ATTACH) {
 		switch (ptrace_scope) {
 		case YAMA_SCOPE_DISABLED:
 			/* No additional restrictions. */
@@ -318,7 +318,7 @@ int yama_ptrace_access_check(struct task
 		}
 	}
 
-	if (rc) {
+	if (rc && (mode & PTRACE_MODE_NOAUDIT) == 0) {
 		printk_ratelimited(KERN_NOTICE
 			"ptrace of pid %d was attempted by: %s (pid %d)\n",
 			child->pid, current->comm, current->pid);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/sound/pci/hda/hda_generic.c linux-libre-3.18.31-gnu/sound/pci/hda/hda_generic.c
--- linux-libre-3.18.30-gnu/sound/pci/hda/hda_generic.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/sound/pci/hda/hda_generic.c	2016-04-19 07:57:18.000000000 -0400
@@ -705,9 +705,6 @@ static void activate_amp(struct hda_code
 	unsigned int caps;
 	unsigned int mask, val;
 
-	if (!enable && is_active_nid(codec, nid, dir, idx_to_check))
-		return;
-
 	caps = query_amp_caps(codec, nid, dir);
 	val = get_amp_val_to_activate(codec, nid, dir, caps, enable);
 	mask = get_amp_mask_to_modify(codec, nid, dir, idx_to_check, caps);
@@ -718,12 +715,22 @@ static void activate_amp(struct hda_code
 	update_amp(codec, nid, dir, idx, mask, val);
 }
 
+static void check_and_activate_amp(struct hda_codec *codec, hda_nid_t nid,
+				   int dir, int idx, int idx_to_check,
+				   bool enable)
+{
+	/* check whether the given amp is still used by others */
+	if (!enable && is_active_nid(codec, nid, dir, idx_to_check))
+		return;
+	activate_amp(codec, nid, dir, idx, idx_to_check, enable);
+}
+
 static void activate_amp_out(struct hda_codec *codec, struct nid_path *path,
 			     int i, bool enable)
 {
 	hda_nid_t nid = path->path[i];
 	init_amp(codec, nid, HDA_OUTPUT, 0);
-	activate_amp(codec, nid, HDA_OUTPUT, 0, 0, enable);
+	check_and_activate_amp(codec, nid, HDA_OUTPUT, 0, 0, enable);
 }
 
 static void activate_amp_in(struct hda_codec *codec, struct nid_path *path,
@@ -751,9 +758,16 @@ static void activate_amp_in(struct hda_c
 	 * when aa-mixer is available, we need to enable the path as well
 	 */
 	for (n = 0; n < nums; n++) {
-		if (n != idx && (!add_aamix || conn[n] != spec->mixer_merge_nid))
-			continue;
-		activate_amp(codec, nid, HDA_INPUT, n, idx, enable);
+		if (n != idx) {
+			if (conn[n] != spec->mixer_merge_nid)
+				continue;
+			/* when aamix is disabled, force to off */
+			if (!add_aamix) {
+				activate_amp(codec, nid, HDA_INPUT, n, n, false);
+				continue;
+			}
+		}
+		check_and_activate_amp(codec, nid, HDA_INPUT, n, idx, enable);
 	}
 }
 
@@ -1473,6 +1487,12 @@ static bool map_singles(struct hda_codec
 	return found;
 }
 
+static inline bool has_aamix_out_paths(struct hda_gen_spec *spec)
+{
+	return spec->aamix_out_paths[0] || spec->aamix_out_paths[1] ||
+		spec->aamix_out_paths[2];
+}
+
 /* create a new path including aamix if available, and return its index */
 static int check_aamix_out_path(struct hda_codec *codec, int path_idx)
 {
@@ -2315,25 +2335,51 @@ static void update_aamix_paths(struct hd
 	}
 }
 
+/* re-initialize the output paths; only called from loopback_mixing_put() */
+static void update_output_paths(struct hda_codec *codec, int num_outs,
+				const int *paths)
+{
+	struct hda_gen_spec *spec = codec->spec;
+	struct nid_path *path;
+	int i;
+
+	for (i = 0; i < num_outs; i++) {
+		path = snd_hda_get_path_from_idx(codec, paths[i]);
+		if (path)
+			snd_hda_activate_path(codec, path, path->active,
+					      spec->aamix_mode);
+	}
+}
+
 static int loopback_mixing_put(struct snd_kcontrol *kcontrol,
 			       struct snd_ctl_elem_value *ucontrol)
 {
 	struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
 	struct hda_gen_spec *spec = codec->spec;
+	const struct auto_pin_cfg *cfg = &spec->autocfg;
 	unsigned int val = ucontrol->value.enumerated.item[0];
 
 	if (val == spec->aamix_mode)
 		return 0;
 	spec->aamix_mode = val;
-	update_aamix_paths(codec, val, spec->out_paths[0],
-			   spec->aamix_out_paths[0],
-			   spec->autocfg.line_out_type);
-	update_aamix_paths(codec, val, spec->hp_paths[0],
-			   spec->aamix_out_paths[1],
-			   AUTO_PIN_HP_OUT);
-	update_aamix_paths(codec, val, spec->speaker_paths[0],
-			   spec->aamix_out_paths[2],
-			   AUTO_PIN_SPEAKER_OUT);
+	if (has_aamix_out_paths(spec)) {
+		update_aamix_paths(codec, val, spec->out_paths[0],
+				   spec->aamix_out_paths[0],
+				   cfg->line_out_type);
+		update_aamix_paths(codec, val, spec->hp_paths[0],
+				   spec->aamix_out_paths[1],
+				   AUTO_PIN_HP_OUT);
+		update_aamix_paths(codec, val, spec->speaker_paths[0],
+				   spec->aamix_out_paths[2],
+				   AUTO_PIN_SPEAKER_OUT);
+	} else {
+		update_output_paths(codec, cfg->line_outs, spec->out_paths);
+		if (cfg->line_out_type != AUTO_PIN_HP_OUT)
+			update_output_paths(codec, cfg->hp_outs, spec->hp_paths);
+		if (cfg->line_out_type != AUTO_PIN_SPEAKER_OUT)
+			update_output_paths(codec, cfg->speaker_outs,
+					    spec->speaker_paths);
+	}
 	return 1;
 }
 
@@ -2351,12 +2397,13 @@ static int create_loopback_mixing_ctl(st
 
 	if (!spec->mixer_nid)
 		return 0;
-	if (!(spec->aamix_out_paths[0] || spec->aamix_out_paths[1] ||
-	      spec->aamix_out_paths[2]))
-		return 0;
 	if (!snd_hda_gen_add_kctl(spec, NULL, &loopback_mixing_enum))
 		return -ENOMEM;
 	spec->have_aamix_ctl = 1;
+	/* if no explicit aamix path is present (e.g. for Realtek codecs),
+	 * enable aamix as default -- just for compatibility
+	 */
+	spec->aamix_mode = !has_aamix_out_paths(spec);
 	return 0;
 }
 
@@ -5236,6 +5283,8 @@ static void init_aamix_paths(struct hda_
 
 	if (!spec->have_aamix_ctl)
 		return;
+	if (!has_aamix_out_paths(spec))
+		return;
 	update_aamix_paths(codec, spec->aamix_mode, spec->out_paths[0],
 			   spec->aamix_out_paths[0],
 			   spec->autocfg.line_out_type);
diff -druNp --no-dereference linux-libre-3.18.30-gnu/sound/pci/hda/patch_cirrus.c linux-libre-3.18.31-gnu/sound/pci/hda/patch_cirrus.c
--- linux-libre-3.18.30-gnu/sound/pci/hda/patch_cirrus.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/sound/pci/hda/patch_cirrus.c	2016-04-19 07:57:18.000000000 -0400
@@ -174,8 +174,12 @@ static void cs_automute(struct hda_codec
 	snd_hda_gen_update_outputs(codec);
 
 	if (spec->gpio_eapd_hp || spec->gpio_eapd_speaker) {
-		spec->gpio_data = spec->gen.hp_jack_present ?
-			spec->gpio_eapd_hp : spec->gpio_eapd_speaker;
+		if (spec->gen.automute_speaker)
+			spec->gpio_data = spec->gen.hp_jack_present ?
+				spec->gpio_eapd_hp : spec->gpio_eapd_speaker;
+		else
+			spec->gpio_data =
+				spec->gpio_eapd_hp | spec->gpio_eapd_speaker;
 		snd_hda_codec_write(codec, 0x01, 0,
 				    AC_VERB_SET_GPIO_DATA, spec->gpio_data);
 	}
diff -druNp --no-dereference linux-libre-3.18.30-gnu/sound/pci/hda/patch_hdmi.c linux-libre-3.18.31-gnu/sound/pci/hda/patch_hdmi.c
--- linux-libre-3.18.30-gnu/sound/pci/hda/patch_hdmi.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/sound/pci/hda/patch_hdmi.c	2016-04-19 07:57:18.000000000 -0400
@@ -1555,6 +1555,8 @@ static bool hdmi_present_sense(struct hd
 
 	mutex_lock(&per_pin->lock);
 	pin_eld->monitor_present = !!(present & AC_PINSENSE_PRESENCE);
+	eld->monitor_present = pin_eld->monitor_present;
+
 	if (pin_eld->monitor_present)
 		eld->eld_valid  = !!(present & AC_PINSENSE_ELDV);
 	else
@@ -3356,6 +3358,9 @@ static const struct hda_codec_preset snd
 { .id = 0x10de0070, .name = "GPU 70 HDMI/DP",	.patch = patch_nvhdmi },
 { .id = 0x10de0071, .name = "GPU 71 HDMI/DP",	.patch = patch_nvhdmi },
 { .id = 0x10de0072, .name = "GPU 72 HDMI/DP",	.patch = patch_nvhdmi },
+{ .id = 0x10de007d, .name = "GPU 7d HDMI/DP",	.patch = patch_nvhdmi },
+{ .id = 0x10de0082, .name = "GPU 82 HDMI/DP",	.patch = patch_nvhdmi },
+{ .id = 0x10de0083, .name = "GPU 83 HDMI/DP",	.patch = patch_nvhdmi },
 { .id = 0x10de8001, .name = "MCP73 HDMI",	.patch = patch_nvhdmi_2ch },
 { .id = 0x11069f80, .name = "VX900 HDMI/DP",	.patch = patch_via_hdmi },
 { .id = 0x11069f81, .name = "VX900 HDMI/DP",	.patch = patch_via_hdmi },
@@ -3417,6 +3422,7 @@ MODULE_ALIAS("snd-hda-codec-id:10de0067"
 MODULE_ALIAS("snd-hda-codec-id:10de0070");
 MODULE_ALIAS("snd-hda-codec-id:10de0071");
 MODULE_ALIAS("snd-hda-codec-id:10de0072");
+MODULE_ALIAS("snd-hda-codec-id:10de007d");
 MODULE_ALIAS("snd-hda-codec-id:10de8001");
 MODULE_ALIAS("snd-hda-codec-id:11069f80");
 MODULE_ALIAS("snd-hda-codec-id:11069f81");
diff -druNp --no-dereference linux-libre-3.18.30-gnu/sound/pci/hda/patch_realtek.c linux-libre-3.18.31-gnu/sound/pci/hda/patch_realtek.c
--- linux-libre-3.18.30-gnu/sound/pci/hda/patch_realtek.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/sound/pci/hda/patch_realtek.c	2016-04-19 07:57:18.000000000 -0400
@@ -4618,6 +4618,7 @@ enum {
 	ALC290_FIXUP_SUBWOOFER,
 	ALC290_FIXUP_SUBWOOFER_HSJACK,
 	ALC269_FIXUP_THINKPAD_ACPI,
+	ALC269_FIXUP_DMIC_THINKPAD_ACPI,
 	ALC255_FIXUP_DELL1_MIC_NO_PRESENCE,
 	ALC255_FIXUP_DELL2_MIC_NO_PRESENCE,
 	ALC255_FIXUP_HEADSET_MODE,
@@ -5052,6 +5053,12 @@ static const struct hda_fixup alc269_fix
 		.type = HDA_FIXUP_FUNC,
 		.v.func = hda_fixup_thinkpad_acpi,
 	},
+	[ALC269_FIXUP_DMIC_THINKPAD_ACPI] = {
+		.type = HDA_FIXUP_FUNC,
+		.v.func = alc_fixup_inv_dmic,
+		.chained = true,
+		.chain_id = ALC269_FIXUP_THINKPAD_ACPI,
+	},
 	[ALC255_FIXUP_DELL1_MIC_NO_PRESENCE] = {
 		.type = HDA_FIXUP_PINS,
 		.v.pins = (const struct hda_pintbl[]) {
@@ -5386,6 +5393,8 @@ static const struct snd_pci_quirk alc269
 	SND_PCI_QUIRK(0x17aa, 0x2226, "ThinkPad X250", ALC292_FIXUP_TPT440_DOCK),
 	SND_PCI_QUIRK(0x17aa, 0x2233, "Thinkpad", ALC293_FIXUP_LENOVO_SPK_NOISE),
 	SND_PCI_QUIRK(0x17aa, 0x30bb, "ThinkCentre AIO", ALC233_FIXUP_LENOVO_LINE2_MIC_HOTKEY),
+	SND_PCI_QUIRK(0x17aa, 0x30e2, "ThinkCentre AIO", ALC233_FIXUP_LENOVO_LINE2_MIC_HOTKEY),
+	SND_PCI_QUIRK(0x17aa, 0x3902, "Lenovo E50-80", ALC269_FIXUP_DMIC_THINKPAD_ACPI),
 	SND_PCI_QUIRK(0x17aa, 0x3977, "IdeaPad S210", ALC283_FIXUP_INT_MIC),
 	SND_PCI_QUIRK(0x17aa, 0x3978, "IdeaPad Y410P", ALC269_FIXUP_NO_SHUTUP),
 	SND_PCI_QUIRK(0x17aa, 0x5013, "Thinkpad", ALC269_FIXUP_LIMIT_INT_MIC_BOOST),
diff -druNp --no-dereference linux-libre-3.18.30-gnu/sound/pci/intel8x0.c linux-libre-3.18.31-gnu/sound/pci/intel8x0.c
--- linux-libre-3.18.30-gnu/sound/pci/intel8x0.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/sound/pci/intel8x0.c	2016-04-19 07:57:18.000000000 -0400
@@ -2894,6 +2894,7 @@ static void intel8x0_measure_ac97_clock(
 
 static struct snd_pci_quirk intel8x0_clock_list[] = {
 	SND_PCI_QUIRK(0x0e11, 0x008a, "AD1885", 41000),
+	SND_PCI_QUIRK(0x1014, 0x0581, "AD1981B", 48000),
 	SND_PCI_QUIRK(0x1028, 0x00be, "AD1885", 44100),
 	SND_PCI_QUIRK(0x1028, 0x0177, "AD1980", 48000),
 	SND_PCI_QUIRK(0x1028, 0x01ad, "AD1981B", 48000),
diff -druNp --no-dereference linux-libre-3.18.30-gnu/sound/usb/mixer.c linux-libre-3.18.31-gnu/sound/usb/mixer.c
--- linux-libre-3.18.30-gnu/sound/usb/mixer.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/sound/usb/mixer.c	2016-04-19 07:57:18.000000000 -0400
@@ -805,12 +805,12 @@ static struct usb_feature_control_info a
 	{ "Tone Control - Treble",	USB_MIXER_S8 },
 	{ "Graphic Equalizer",		USB_MIXER_S8 }, /* FIXME: not implemeted yet */
 	{ "Auto Gain Control",		USB_MIXER_BOOLEAN },
-	{ "Delay Control",		USB_MIXER_U16 },
+	{ "Delay Control",		USB_MIXER_U16 }, /* FIXME: U32 in UAC2 */
 	{ "Bass Boost",			USB_MIXER_BOOLEAN },
 	{ "Loudness",			USB_MIXER_BOOLEAN },
 	/* UAC2 specific */
-	{ "Input Gain Control",		USB_MIXER_U16 },
-	{ "Input Gain Pad Control",	USB_MIXER_BOOLEAN },
+	{ "Input Gain Control",		USB_MIXER_S16 },
+	{ "Input Gain Pad Control",	USB_MIXER_S16 },
 	{ "Phase Inverter Control",	USB_MIXER_BOOLEAN },
 };
 
diff -druNp --no-dereference linux-libre-3.18.30-gnu/sound/usb/quirks.c linux-libre-3.18.31-gnu/sound/usb/quirks.c
--- linux-libre-3.18.30-gnu/sound/usb/quirks.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/sound/usb/quirks.c	2016-04-19 07:57:18.000000000 -0400
@@ -168,6 +168,12 @@ static int create_fixed_stream_quirk(str
 	}
 	alts = &iface->altsetting[fp->altset_idx];
 	altsd = get_iface_desc(alts);
+	if (altsd->bNumEndpoints < 1) {
+		kfree(fp);
+		kfree(rate_table);
+		return -EINVAL;
+	}
+
 	fp->protocol = altsd->bInterfaceProtocol;
 
 	if (fp->datainterval == 0)
@@ -1108,6 +1114,7 @@ bool snd_usb_get_sample_rate_quirk(struc
 	switch (chip->usb_id) {
 	case USB_ID(0x045E, 0x075D): /* MS Lifecam Cinema  */
 	case USB_ID(0x045E, 0x076D): /* MS Lifecam HD-5000 */
+	case USB_ID(0x045E, 0x076E): /* MS Lifecam HD-5001 */
 	case USB_ID(0x045E, 0x076F): /* MS Lifecam HD-6000 */
 	case USB_ID(0x045E, 0x0772): /* MS Lifecam Studio */
 	case USB_ID(0x045E, 0x0779): /* MS Lifecam HD-3000 */
diff -druNp --no-dereference linux-libre-3.18.30-gnu/tools/hv/Makefile linux-libre-3.18.31-gnu/tools/hv/Makefile
--- linux-libre-3.18.30-gnu/tools/hv/Makefile	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/tools/hv/Makefile	2016-04-19 07:57:18.000000000 -0400
@@ -5,9 +5,11 @@ PTHREAD_LIBS = -lpthread
 WARNINGS = -Wall -Wextra
 CFLAGS = $(WARNINGS) -g $(PTHREAD_LIBS)
 
-all: hv_kvp_daemon hv_vss_daemon
+CFLAGS += -D__EXPORTED_HEADERS__ -I../../include/uapi -I../../include
+
+all: hv_kvp_daemon hv_vss_daemon hv_fcopy_daemon
 %: %.c
 	$(CC) $(CFLAGS) -o $@ $^
 
 clean:
-	$(RM) hv_kvp_daemon hv_vss_daemon
+	$(RM) hv_kvp_daemon hv_vss_daemon hv_fcopy_daemon
diff -druNp --no-dereference linux-libre-3.18.30-gnu/tools/perf/util/pmu.c linux-libre-3.18.31-gnu/tools/perf/util/pmu.c
--- linux-libre-3.18.30-gnu/tools/perf/util/pmu.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/tools/perf/util/pmu.c	2016-04-19 07:57:18.000000000 -0400
@@ -221,13 +221,12 @@ static int pmu_aliases_parse(char *dir,
 {
 	struct dirent *evt_ent;
 	DIR *event_dir;
-	int ret = 0;
 
 	event_dir = opendir(dir);
 	if (!event_dir)
 		return -EINVAL;
 
-	while (!ret && (evt_ent = readdir(event_dir))) {
+	while ((evt_ent = readdir(event_dir))) {
 		char path[PATH_MAX];
 		char *name = evt_ent->d_name;
 		FILE *file;
@@ -243,17 +242,19 @@ static int pmu_aliases_parse(char *dir,
 
 		snprintf(path, PATH_MAX, "%s/%s", dir, name);
 
-		ret = -EINVAL;
 		file = fopen(path, "r");
-		if (!file)
-			break;
+		if (!file) {
+			pr_debug("Cannot open %s\n", path);
+			continue;
+		}
 
-		ret = perf_pmu__new_alias(head, dir, name, file);
+		if (perf_pmu__new_alias(head, dir, name, file) < 0)
+			pr_debug("Cannot set up %s\n", name);
 		fclose(file);
 	}
 
 	closedir(event_dir);
-	return ret;
+	return 0;
 }
 
 /*
diff -druNp --no-dereference linux-libre-3.18.30-gnu/tools/testing/selftests/efivarfs/efivarfs.sh linux-libre-3.18.31-gnu/tools/testing/selftests/efivarfs/efivarfs.sh
--- linux-libre-3.18.30-gnu/tools/testing/selftests/efivarfs/efivarfs.sh	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/tools/testing/selftests/efivarfs/efivarfs.sh	2016-04-19 07:57:18.000000000 -0400
@@ -88,7 +88,11 @@ test_delete()
 		exit 1
 	fi
 
-	rm $file
+	rm $file 2>/dev/null
+	if [ $? -ne 0 ]; then
+		chattr -i $file
+		rm $file
+	fi
 
 	if [ -e $file ]; then
 		echo "$file couldn't be deleted" >&2
@@ -111,6 +115,7 @@ test_zero_size_delete()
 		exit 1
 	fi
 
+	chattr -i $file
 	printf "$attrs" > $file
 
 	if [ -e $file ]; then
@@ -141,7 +146,11 @@ test_valid_filenames()
 			echo "$file could not be created" >&2
 			ret=1
 		else
-			rm $file
+			rm $file 2>/dev/null
+			if [ $? -ne 0 ]; then
+				chattr -i $file
+				rm $file
+			fi
 		fi
 	done
 
@@ -174,7 +183,11 @@ test_invalid_filenames()
 
 		if [ -e $file ]; then
 			echo "Creating $file should have failed" >&2
-			rm $file
+			rm $file 2>/dev/null
+			if [ $? -ne 0 ]; then
+				chattr -i $file
+				rm $file
+			fi
 			ret=1
 		fi
 	done
diff -druNp --no-dereference linux-libre-3.18.30-gnu/tools/testing/selftests/efivarfs/open-unlink.c linux-libre-3.18.31-gnu/tools/testing/selftests/efivarfs/open-unlink.c
--- linux-libre-3.18.30-gnu/tools/testing/selftests/efivarfs/open-unlink.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/tools/testing/selftests/efivarfs/open-unlink.c	2016-04-19 07:57:18.000000000 -0400
@@ -1,10 +1,68 @@
+#include <errno.h>
 #include <stdio.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <sys/ioctl.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
+#include <linux/fs.h>
+
+static int set_immutable(const char *path, int immutable)
+{
+	unsigned int flags;
+	int fd;
+	int rc;
+	int error;
+
+	fd = open(path, O_RDONLY);
+	if (fd < 0)
+		return fd;
+
+	rc = ioctl(fd, FS_IOC_GETFLAGS, &flags);
+	if (rc < 0) {
+		error = errno;
+		close(fd);
+		errno = error;
+		return rc;
+	}
+
+	if (immutable)
+		flags |= FS_IMMUTABLE_FL;
+	else
+		flags &= ~FS_IMMUTABLE_FL;
+
+	rc = ioctl(fd, FS_IOC_SETFLAGS, &flags);
+	error = errno;
+	close(fd);
+	errno = error;
+	return rc;
+}
+
+static int get_immutable(const char *path)
+{
+	unsigned int flags;
+	int fd;
+	int rc;
+	int error;
+
+	fd = open(path, O_RDONLY);
+	if (fd < 0)
+		return fd;
+
+	rc = ioctl(fd, FS_IOC_GETFLAGS, &flags);
+	if (rc < 0) {
+		error = errno;
+		close(fd);
+		errno = error;
+		return rc;
+	}
+	close(fd);
+	if (flags & FS_IMMUTABLE_FL)
+		return 1;
+	return 0;
+}
 
 int main(int argc, char **argv)
 {
@@ -27,7 +85,7 @@ int main(int argc, char **argv)
 	buf[4] = 0;
 
 	/* create a test variable */
-	fd = open(path, O_WRONLY | O_CREAT);
+	fd = open(path, O_WRONLY | O_CREAT, 0600);
 	if (fd < 0) {
 		perror("open(O_WRONLY)");
 		return EXIT_FAILURE;
@@ -41,6 +99,18 @@ int main(int argc, char **argv)
 
 	close(fd);
 
+	rc = get_immutable(path);
+	if (rc < 0) {
+		perror("ioctl(FS_IOC_GETFLAGS)");
+		return EXIT_FAILURE;
+	} else if (rc) {
+		rc = set_immutable(path, 0);
+		if (rc < 0) {
+			perror("ioctl(FS_IOC_SETFLAGS)");
+			return EXIT_FAILURE;
+		}
+	}
+
 	fd = open(path, O_RDONLY);
 	if (fd < 0) {
 		perror("open");
diff -druNp --no-dereference linux-libre-3.18.30-gnu/virt/kvm/kvm_main.c linux-libre-3.18.31-gnu/virt/kvm/kvm_main.c
--- linux-libre-3.18.30-gnu/virt/kvm/kvm_main.c	2016-04-03 18:27:20.000000000 -0400
+++ linux-libre-3.18.31-gnu/virt/kvm/kvm_main.c	2016-04-19 07:57:18.000000000 -0400
@@ -460,6 +460,16 @@ static struct kvm *kvm_create_vm(unsigne
 	if (!kvm)
 		return ERR_PTR(-ENOMEM);
 
+	spin_lock_init(&kvm->mmu_lock);
+	atomic_inc(&current->mm->mm_count);
+	kvm->mm = current->mm;
+	kvm_eventfd_init(kvm);
+	mutex_init(&kvm->lock);
+	mutex_init(&kvm->irq_lock);
+	mutex_init(&kvm->slots_lock);
+	atomic_set(&kvm->users_count, 1);
+	INIT_LIST_HEAD(&kvm->devices);
+
 	r = kvm_arch_init_vm(kvm, type);
 	if (r)
 		goto out_err_no_disable;
@@ -500,16 +510,6 @@ static struct kvm *kvm_create_vm(unsigne
 			goto out_err;
 	}
 
-	spin_lock_init(&kvm->mmu_lock);
-	kvm->mm = current->mm;
-	atomic_inc(&kvm->mm->mm_count);
-	kvm_eventfd_init(kvm);
-	mutex_init(&kvm->lock);
-	mutex_init(&kvm->irq_lock);
-	mutex_init(&kvm->slots_lock);
-	atomic_set(&kvm->users_count, 1);
-	INIT_LIST_HEAD(&kvm->devices);
-
 	r = kvm_init_mmu_notifier(kvm);
 	if (r)
 		goto out_err;
@@ -531,6 +531,7 @@ out_err_no_disable:
 		kfree(kvm->buses[i]);
 	kvfree(kvm->memslots);
 	kvm_arch_free_vm(kvm);
+	mmdrop(current->mm);
 	return ERR_PTR(r);
 }
 
