diff -druNp --no-dereference linux-libre-3.15.5-gnu/arch/arm64/include/asm/memory.h linux-libre-3.15.6-gnu/arch/arm64/include/asm/memory.h
--- linux-libre-3.15.5-gnu/arch/arm64/include/asm/memory.h	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/arch/arm64/include/asm/memory.h	2014-07-17 19:23:31.000000000 -0400
@@ -56,6 +56,8 @@
 #define TASK_SIZE_32		UL(0x100000000)
 #define TASK_SIZE		(test_thread_flag(TIF_32BIT) ? \
 				TASK_SIZE_32 : TASK_SIZE_64)
+#define TASK_SIZE_OF(tsk)	(test_tsk_thread_flag(tsk, TIF_32BIT) ? \
+				TASK_SIZE_32 : TASK_SIZE_64)
 #else
 #define TASK_SIZE		TASK_SIZE_64
 #endif /* CONFIG_COMPAT */
diff -druNp --no-dereference linux-libre-3.15.5-gnu/arch/parisc/kernel/hardware.c linux-libre-3.15.6-gnu/arch/parisc/kernel/hardware.c
--- linux-libre-3.15.5-gnu/arch/parisc/kernel/hardware.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/arch/parisc/kernel/hardware.c	2014-07-17 19:23:31.000000000 -0400
@@ -1210,7 +1210,8 @@ static struct hp_hardware hp_hardware_li
 	{HPHW_FIO, 0x004, 0x00320, 0x0, "Metheus Frame Buffer"}, 
 	{HPHW_FIO, 0x004, 0x00340, 0x0, "BARCO CX4500 VME Grphx Cnsl"}, 
 	{HPHW_FIO, 0x004, 0x00360, 0x0, "Hughes TOG VME FDDI"}, 
-	{HPHW_FIO, 0x076, 0x000AD, 0x00, "Crestone Peak RS-232"},
+	{HPHW_FIO, 0x076, 0x000AD, 0x0, "Crestone Peak Core RS-232"},
+	{HPHW_FIO, 0x077, 0x000AD, 0x0, "Crestone Peak Fast? Core RS-232"},
 	{HPHW_IOA, 0x185, 0x0000B, 0x00, "Java BC Summit Port"}, 
 	{HPHW_IOA, 0x1FF, 0x0000B, 0x00, "Hitachi Ghostview Summit Port"}, 
 	{HPHW_IOA, 0x580, 0x0000B, 0x10, "U2-IOA BC Runway Port"}, 
diff -druNp --no-dereference linux-libre-3.15.5-gnu/arch/parisc/kernel/syscall_table.S linux-libre-3.15.6-gnu/arch/parisc/kernel/syscall_table.S
--- linux-libre-3.15.5-gnu/arch/parisc/kernel/syscall_table.S	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/arch/parisc/kernel/syscall_table.S	2014-07-17 19:23:31.000000000 -0400
@@ -418,7 +418,7 @@
 	ENTRY_SAME(accept4)		/* 320 */
 	ENTRY_SAME(prlimit64)
 	ENTRY_SAME(fanotify_init)
-	ENTRY_COMP(fanotify_mark)
+	ENTRY_DIFF(fanotify_mark)
 	ENTRY_COMP(clock_adjtime)
 	ENTRY_SAME(name_to_handle_at)	/* 325 */
 	ENTRY_COMP(open_by_handle_at)
diff -druNp --no-dereference linux-libre-3.15.5-gnu/arch/parisc/kernel/sys_parisc32.c linux-libre-3.15.6-gnu/arch/parisc/kernel/sys_parisc32.c
--- linux-libre-3.15.5-gnu/arch/parisc/kernel/sys_parisc32.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/arch/parisc/kernel/sys_parisc32.c	2014-07-17 19:23:31.000000000 -0400
@@ -4,6 +4,7 @@
  * Copyright (C) 2000-2001 Hewlett Packard Company
  * Copyright (C) 2000 John Marvin
  * Copyright (C) 2001 Matthew Wilcox
+ * Copyright (C) 2014 Helge Deller <deller@gmx.de>
  *
  * These routines maintain argument size conversion between 32bit and 64bit
  * environment. Based heavily on sys_ia32.c and sys_sparc32.c.
@@ -57,3 +58,12 @@ asmlinkage long sys32_unimplemented(int
     	current->comm, current->pid, r20);
     return -ENOSYS;
 }
+
+asmlinkage long sys32_fanotify_mark(compat_int_t fanotify_fd, compat_uint_t flags,
+	compat_uint_t mask0, compat_uint_t mask1, compat_int_t dfd,
+	const char  __user * pathname)
+{
+	return sys_fanotify_mark(fanotify_fd, flags,
+			((__u64)mask1 << 32) | mask0,
+			 dfd, pathname);
+}
diff -druNp --no-dereference linux-libre-3.15.5-gnu/arch/powerpc/include/asm/perf_event_server.h linux-libre-3.15.6-gnu/arch/powerpc/include/asm/perf_event_server.h
--- linux-libre-3.15.5-gnu/arch/powerpc/include/asm/perf_event_server.h	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/arch/powerpc/include/asm/perf_event_server.h	2014-07-17 19:23:31.000000000 -0400
@@ -61,8 +61,7 @@ struct power_pmu {
 #define PPMU_SIAR_VALID		0x00000010 /* Processor has SIAR Valid bit */
 #define PPMU_HAS_SSLOT		0x00000020 /* Has sampled slot in MMCRA */
 #define PPMU_HAS_SIER		0x00000040 /* Has SIER */
-#define PPMU_BHRB		0x00000080 /* has BHRB feature enabled */
-#define PPMU_EBB		0x00000100 /* supports event based branch */
+#define PPMU_ARCH_207S		0x00000080 /* PMC is architecture v2.07S */
 
 /*
  * Values for flags to get_alternatives()
diff -druNp --no-dereference linux-libre-3.15.5-gnu/arch/powerpc/Kconfig linux-libre-3.15.6-gnu/arch/powerpc/Kconfig
--- linux-libre-3.15.5-gnu/arch/powerpc/Kconfig	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/arch/powerpc/Kconfig	2014-07-17 19:23:31.000000000 -0400
@@ -414,7 +414,7 @@ config KEXEC
 config CRASH_DUMP
 	bool "Build a kdump crash kernel"
 	depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
-	select RELOCATABLE if PPC64 || 44x || FSL_BOOKE
+	select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
 	help
 	  Build a kernel suitable for use as a kdump capture kernel.
 	  The same kernel binary can be used as production kernel and dump
@@ -1009,6 +1009,7 @@ endmenu
 if PPC64
 config RELOCATABLE
 	bool "Build a relocatable kernel"
+	depends on !COMPILE_TEST
 	select NONSTATIC_KERNEL
 	help
 	  This builds a kernel image that is capable of running anywhere
diff -druNp --no-dereference linux-libre-3.15.5-gnu/arch/powerpc/kvm/book3s_hv_interrupts.S linux-libre-3.15.6-gnu/arch/powerpc/kvm/book3s_hv_interrupts.S
--- linux-libre-3.15.5-gnu/arch/powerpc/kvm/book3s_hv_interrupts.S	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/arch/powerpc/kvm/book3s_hv_interrupts.S	2014-07-17 19:23:31.000000000 -0400
@@ -127,11 +127,6 @@ BEGIN_FTR_SECTION
 	stw	r10, HSTATE_PMC + 24(r13)
 	stw	r11, HSTATE_PMC + 28(r13)
 END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201)
-BEGIN_FTR_SECTION
-	mfspr	r9, SPRN_SIER
-	std	r8, HSTATE_MMCR + 40(r13)
-	std	r9, HSTATE_MMCR + 48(r13)
-END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
 31:
 
 	/*
diff -druNp --no-dereference linux-libre-3.15.5-gnu/arch/powerpc/perf/core-book3s.c linux-libre-3.15.6-gnu/arch/powerpc/perf/core-book3s.c
--- linux-libre-3.15.5-gnu/arch/powerpc/perf/core-book3s.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/arch/powerpc/perf/core-book3s.c	2014-07-17 19:23:31.000000000 -0400
@@ -485,7 +485,7 @@ static bool is_ebb_event(struct perf_eve
 	 * check that the PMU supports EBB, meaning those that don't can still
 	 * use bit 63 of the event code for something else if they wish.
 	 */
-	return (ppmu->flags & PPMU_EBB) &&
+	return (ppmu->flags & PPMU_ARCH_207S) &&
 	       ((event->attr.config >> PERF_EVENT_CONFIG_EBB_SHIFT) & 1);
 }
 
@@ -777,7 +777,7 @@ void perf_event_print_debug(void)
 	if (ppmu->flags & PPMU_HAS_SIER)
 		sier = mfspr(SPRN_SIER);
 
-	if (ppmu->flags & PPMU_EBB) {
+	if (ppmu->flags & PPMU_ARCH_207S) {
 		pr_info("MMCR2: %016lx EBBHR: %016lx\n",
 			mfspr(SPRN_MMCR2), mfspr(SPRN_EBBHR));
 		pr_info("EBBRR: %016lx BESCR: %016lx\n",
@@ -996,7 +996,22 @@ static void power_pmu_read(struct perf_e
 	} while (local64_cmpxchg(&event->hw.prev_count, prev, val) != prev);
 
 	local64_add(delta, &event->count);
-	local64_sub(delta, &event->hw.period_left);
+
+	/*
+	 * A number of places program the PMC with (0x80000000 - period_left).
+	 * We never want period_left to be less than 1 because we will program
+	 * the PMC with a value >= 0x800000000 and an edge detected PMC will
+	 * roll around to 0 before taking an exception. We have seen this
+	 * on POWER8.
+	 *
+	 * To fix this, clamp the minimum value of period_left to 1.
+	 */
+	do {
+		prev = local64_read(&event->hw.period_left);
+		val = prev - delta;
+		if (val < 1)
+			val = 1;
+	} while (local64_cmpxchg(&event->hw.period_left, prev, val) != prev);
 }
 
 /*
@@ -1300,6 +1315,9 @@ static void power_pmu_enable(struct pmu
 
 	write_mmcr0(cpuhw, mmcr0);
 
+	if (ppmu->flags & PPMU_ARCH_207S)
+		mtspr(SPRN_MMCR2, 0);
+
 	/*
 	 * Enable instruction sampling if necessary
 	 */
@@ -1696,7 +1714,7 @@ static int power_pmu_event_init(struct p
 
 	if (has_branch_stack(event)) {
 	        /* PMU has BHRB enabled */
-		if (!(ppmu->flags & PPMU_BHRB))
+		if (!(ppmu->flags & PPMU_ARCH_207S))
 			return -EOPNOTSUPP;
 	}
 
diff -druNp --no-dereference linux-libre-3.15.5-gnu/arch/powerpc/perf/power8-pmu.c linux-libre-3.15.6-gnu/arch/powerpc/perf/power8-pmu.c
--- linux-libre-3.15.5-gnu/arch/powerpc/perf/power8-pmu.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/arch/powerpc/perf/power8-pmu.c	2014-07-17 19:23:31.000000000 -0400
@@ -792,7 +792,7 @@ static struct power_pmu power8_pmu = {
 	.get_constraint		= power8_get_constraint,
 	.get_alternatives	= power8_get_alternatives,
 	.disable_pmc		= power8_disable_pmc,
-	.flags			= PPMU_HAS_SSLOT | PPMU_HAS_SIER | PPMU_BHRB | PPMU_EBB,
+	.flags			= PPMU_HAS_SSLOT | PPMU_HAS_SIER | PPMU_ARCH_207S,
 	.n_generic		= ARRAY_SIZE(power8_generic_events),
 	.generic_events		= power8_generic_events,
 	.cache_events		= &power8_cache_events,
diff -druNp --no-dereference linux-libre-3.15.5-gnu/arch/x86/crypto/sha512_ssse3_glue.c linux-libre-3.15.6-gnu/arch/x86/crypto/sha512_ssse3_glue.c
--- linux-libre-3.15.5-gnu/arch/x86/crypto/sha512_ssse3_glue.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/arch/x86/crypto/sha512_ssse3_glue.c	2014-07-17 19:23:31.000000000 -0400
@@ -141,7 +141,7 @@ static int sha512_ssse3_final(struct sha
 
 	/* save number of bits */
 	bits[1] = cpu_to_be64(sctx->count[0] << 3);
-	bits[0] = cpu_to_be64(sctx->count[1] << 3) | sctx->count[0] >> 61;
+	bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61);
 
 	/* Pad out to 112 mod 128 and append length */
 	index = sctx->count[0] & 0x7f;
diff -druNp --no-dereference linux-libre-3.15.5-gnu/arch/x86/mm/ioremap.c linux-libre-3.15.6-gnu/arch/x86/mm/ioremap.c
--- linux-libre-3.15.5-gnu/arch/x86/mm/ioremap.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/arch/x86/mm/ioremap.c	2014-07-17 19:23:31.000000000 -0400
@@ -50,6 +50,21 @@ int ioremap_change_attr(unsigned long va
 	return err;
 }
 
+static int __ioremap_check_ram(unsigned long start_pfn, unsigned long nr_pages,
+			       void *arg)
+{
+	unsigned long i;
+
+	for (i = 0; i < nr_pages; ++i)
+		if (pfn_valid(start_pfn + i) &&
+		    !PageReserved(pfn_to_page(start_pfn + i)))
+			return 1;
+
+	WARN_ONCE(1, "ioremap on RAM pfn 0x%lx\n", start_pfn);
+
+	return 0;
+}
+
 /*
  * Remap an arbitrary physical address space into the kernel virtual
  * address space. Needed when the kernel wants to access high addresses
@@ -93,14 +108,11 @@ static void __iomem *__ioremap_caller(re
 	/*
 	 * Don't allow anybody to remap normal RAM that we're using..
 	 */
+	pfn      = phys_addr >> PAGE_SHIFT;
 	last_pfn = last_addr >> PAGE_SHIFT;
-	for (pfn = phys_addr >> PAGE_SHIFT; pfn <= last_pfn; pfn++) {
-		int is_ram = page_is_ram(pfn);
-
-		if (is_ram && pfn_valid(pfn) && !PageReserved(pfn_to_page(pfn)))
-			return NULL;
-		WARN_ON_ONCE(is_ram);
-	}
+	if (walk_system_ram_range(pfn, last_pfn - pfn + 1, NULL,
+				  __ioremap_check_ram) == 1)
+		return NULL;
 
 	/*
 	 * Mappings have to be page-aligned
diff -druNp --no-dereference linux-libre-3.15.5-gnu/Documentation/cpu-freq/intel-pstate.txt linux-libre-3.15.6-gnu/Documentation/cpu-freq/intel-pstate.txt
--- linux-libre-3.15.5-gnu/Documentation/cpu-freq/intel-pstate.txt	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/Documentation/cpu-freq/intel-pstate.txt	2014-07-17 19:23:31.000000000 -0400
@@ -15,10 +15,13 @@ New sysfs files for controlling P state
 /sys/devices/system/cpu/intel_pstate/
 
       max_perf_pct: limits the maximum P state that will be requested by
-      the driver stated as a percentage of the available performance.
+      the driver stated as a percentage of the available performance. The
+      available (P states) performance may be reduced by the no_turbo
+      setting described below.
 
       min_perf_pct: limits the minimum P state that will be  requested by
-      the driver stated as a percentage of the available performance.
+      the driver stated as a percentage of the max (non-turbo)
+      performance level.
 
       no_turbo: limits the driver to selecting P states below the turbo
       frequency range.
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/acpi/ac.c linux-libre-3.15.6-gnu/drivers/acpi/ac.c
--- linux-libre-3.15.5-gnu/drivers/acpi/ac.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/acpi/ac.c	2014-07-17 19:23:31.000000000 -0400
@@ -30,6 +30,10 @@
 #include <linux/types.h>
 #include <linux/dmi.h>
 #include <linux/delay.h>
+#ifdef CONFIG_ACPI_PROCFS_POWER
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#endif
 #include <linux/platform_device.h>
 #include <linux/power_supply.h>
 #include <linux/acpi.h>
@@ -52,6 +56,7 @@ MODULE_AUTHOR("Paul Diefenbaugh");
 MODULE_DESCRIPTION("ACPI AC Adapter Driver");
 MODULE_LICENSE("GPL");
 
+
 static int acpi_ac_add(struct acpi_device *device);
 static int acpi_ac_remove(struct acpi_device *device);
 static void acpi_ac_notify(struct acpi_device *device, u32 event);
@@ -67,6 +72,13 @@ static int acpi_ac_resume(struct device
 #endif
 static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);
 
+#ifdef CONFIG_ACPI_PROCFS_POWER
+extern struct proc_dir_entry *acpi_lock_ac_dir(void);
+extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
+static int acpi_ac_open_fs(struct inode *inode, struct file *file);
+#endif
+
+
 static int ac_sleep_before_get_state_ms;
 
 static struct acpi_driver acpi_ac_driver = {
@@ -91,6 +103,16 @@ struct acpi_ac {
 
 #define to_acpi_ac(x) container_of(x, struct acpi_ac, charger)
 
+#ifdef CONFIG_ACPI_PROCFS_POWER
+static const struct file_operations acpi_ac_fops = {
+	.owner = THIS_MODULE,
+	.open = acpi_ac_open_fs,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+#endif
+
 /* --------------------------------------------------------------------------
                                AC Adapter Management
    -------------------------------------------------------------------------- */
@@ -143,6 +165,83 @@ static enum power_supply_property ac_pro
 	POWER_SUPPLY_PROP_ONLINE,
 };
 
+#ifdef CONFIG_ACPI_PROCFS_POWER
+/* --------------------------------------------------------------------------
+                              FS Interface (/proc)
+   -------------------------------------------------------------------------- */
+
+static struct proc_dir_entry *acpi_ac_dir;
+
+static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
+{
+	struct acpi_ac *ac = seq->private;
+
+
+	if (!ac)
+		return 0;
+
+	if (acpi_ac_get_state(ac)) {
+		seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
+		return 0;
+	}
+
+	seq_puts(seq, "state:                   ");
+	switch (ac->state) {
+	case ACPI_AC_STATUS_OFFLINE:
+		seq_puts(seq, "off-line\n");
+		break;
+	case ACPI_AC_STATUS_ONLINE:
+		seq_puts(seq, "on-line\n");
+		break;
+	default:
+		seq_puts(seq, "unknown\n");
+		break;
+	}
+
+	return 0;
+}
+
+static int acpi_ac_open_fs(struct inode *inode, struct file *file)
+{
+	return single_open(file, acpi_ac_seq_show, PDE_DATA(inode));
+}
+
+static int acpi_ac_add_fs(struct acpi_ac *ac)
+{
+	struct proc_dir_entry *entry = NULL;
+
+	printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
+			" please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
+	if (!acpi_device_dir(ac->device)) {
+		acpi_device_dir(ac->device) =
+			proc_mkdir(acpi_device_bid(ac->device), acpi_ac_dir);
+		if (!acpi_device_dir(ac->device))
+			return -ENODEV;
+	}
+
+	/* 'state' [R] */
+	entry = proc_create_data(ACPI_AC_FILE_STATE,
+				 S_IRUGO, acpi_device_dir(ac->device),
+				 &acpi_ac_fops, ac);
+	if (!entry)
+		return -ENODEV;
+	return 0;
+}
+
+static int acpi_ac_remove_fs(struct acpi_ac *ac)
+{
+
+	if (acpi_device_dir(ac->device)) {
+		remove_proc_entry(ACPI_AC_FILE_STATE,
+				  acpi_device_dir(ac->device));
+		remove_proc_entry(acpi_device_bid(ac->device), acpi_ac_dir);
+		acpi_device_dir(ac->device) = NULL;
+	}
+
+	return 0;
+}
+#endif
+
 /* --------------------------------------------------------------------------
                                    Driver Model
    -------------------------------------------------------------------------- */
@@ -243,6 +342,11 @@ static int acpi_ac_add(struct acpi_devic
 		goto end;
 
 	ac->charger.name = acpi_device_bid(device);
+#ifdef CONFIG_ACPI_PROCFS_POWER
+	result = acpi_ac_add_fs(ac);
+	if (result)
+		goto end;
+#endif
 	ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
 	ac->charger.properties = ac_props;
 	ac->charger.num_properties = ARRAY_SIZE(ac_props);
@@ -258,8 +362,12 @@ static int acpi_ac_add(struct acpi_devic
 	ac->battery_nb.notifier_call = acpi_ac_battery_notify;
 	register_acpi_notifier(&ac->battery_nb);
 end:
-	if (result)
+	if (result) {
+#ifdef CONFIG_ACPI_PROCFS_POWER
+		acpi_ac_remove_fs(ac);
+#endif
 		kfree(ac);
+	}
 
 	dmi_check_system(ac_dmi_table);
 	return result;
@@ -303,6 +411,10 @@ static int acpi_ac_remove(struct acpi_de
 		power_supply_unregister(&ac->charger);
 	unregister_acpi_notifier(&ac->battery_nb);
 
+#ifdef CONFIG_ACPI_PROCFS_POWER
+	acpi_ac_remove_fs(ac);
+#endif
+
 	kfree(ac);
 
 	return 0;
@@ -315,9 +427,20 @@ static int __init acpi_ac_init(void)
 	if (acpi_disabled)
 		return -ENODEV;
 
+#ifdef CONFIG_ACPI_PROCFS_POWER
+	acpi_ac_dir = acpi_lock_ac_dir();
+	if (!acpi_ac_dir)
+		return -ENODEV;
+#endif
+
+
 	result = acpi_bus_register_driver(&acpi_ac_driver);
-	if (result < 0)
+	if (result < 0) {
+#ifdef CONFIG_ACPI_PROCFS_POWER
+		acpi_unlock_ac_dir(acpi_ac_dir);
+#endif
 		return -ENODEV;
+	}
 
 	return 0;
 }
@@ -325,6 +448,9 @@ static int __init acpi_ac_init(void)
 static void __exit acpi_ac_exit(void)
 {
 	acpi_bus_unregister_driver(&acpi_ac_driver);
+#ifdef CONFIG_ACPI_PROCFS_POWER
+	acpi_unlock_ac_dir(acpi_ac_dir);
+#endif
 }
 module_init(acpi_ac_init);
 module_exit(acpi_ac_exit);
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/acpi/battery.c linux-libre-3.15.6-gnu/drivers/acpi/battery.c
--- linux-libre-3.15.5-gnu/drivers/acpi/battery.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/acpi/battery.c	2014-07-17 19:23:31.000000000 -0400
@@ -34,6 +34,7 @@
 #include <linux/dmi.h>
 #include <linux/slab.h>
 #include <linux/suspend.h>
+#include <linux/delay.h>
 #include <asm/unaligned.h>
 
 #ifdef CONFIG_ACPI_PROCFS_POWER
@@ -1069,6 +1070,28 @@ static struct dmi_system_id bat_dmi_tabl
 	{},
 };
 
+/*
+ * Some machines'(E,G Lenovo Z480) ECs are not stable
+ * during boot up and this causes battery driver fails to be
+ * probed due to failure of getting battery information
+ * from EC sometimes. After several retries, the operation
+ * may work. So add retry code here and 20ms sleep between
+ * every retries.
+ */
+static int acpi_battery_update_retry(struct acpi_battery *battery)
+{
+	int retry, ret;
+
+	for (retry = 5; retry; retry--) {
+		ret = acpi_battery_update(battery);
+		if (!ret)
+			break;
+
+		msleep(20);
+	}
+	return ret;
+}
+
 static int acpi_battery_add(struct acpi_device *device)
 {
 	int result = 0;
@@ -1087,9 +1110,11 @@ static int acpi_battery_add(struct acpi_
 	mutex_init(&battery->sysfs_lock);
 	if (acpi_has_method(battery->device->handle, "_BIX"))
 		set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags);
-	result = acpi_battery_update(battery);
+
+	result = acpi_battery_update_retry(battery);
 	if (result)
 		goto fail;
+
 #ifdef CONFIG_ACPI_PROCFS_POWER
 	result = acpi_battery_add_fs(device);
 #endif
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/acpi/ec.c linux-libre-3.15.6-gnu/drivers/acpi/ec.c
--- linux-libre-3.15.5-gnu/drivers/acpi/ec.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/acpi/ec.c	2014-07-17 19:23:31.000000000 -0400
@@ -78,6 +78,9 @@ enum {
 	EC_FLAGS_BLOCKED,		/* Transactions are blocked */
 };
 
+#define ACPI_EC_COMMAND_POLL		0x01 /* Available for command byte */
+#define ACPI_EC_COMMAND_COMPLETE	0x02 /* Completed last byte */
+
 /* ec.c is compiled in acpi namespace so this shows up as acpi.ec_delay param */
 static unsigned int ec_delay __read_mostly = ACPI_EC_DELAY;
 module_param(ec_delay, uint, 0644);
@@ -109,7 +112,7 @@ struct transaction {
 	u8 ri;
 	u8 wlen;
 	u8 rlen;
-	bool done;
+	u8 flags;
 };
 
 struct acpi_ec *boot_ec, *first_ec;
@@ -150,60 +153,74 @@ static inline void acpi_ec_write_data(st
 	outb(data, ec->data_addr);
 }
 
-static int ec_transaction_done(struct acpi_ec *ec)
+static int ec_transaction_completed(struct acpi_ec *ec)
 {
 	unsigned long flags;
 	int ret = 0;
 	spin_lock_irqsave(&ec->lock, flags);
-	if (!ec->curr || ec->curr->done)
+	if (ec->curr && (ec->curr->flags & ACPI_EC_COMMAND_COMPLETE))
 		ret = 1;
 	spin_unlock_irqrestore(&ec->lock, flags);
 	return ret;
 }
 
-static void start_transaction(struct acpi_ec *ec)
-{
-	ec->curr->irq_count = ec->curr->wi = ec->curr->ri = 0;
-	ec->curr->done = false;
-	acpi_ec_write_cmd(ec, ec->curr->command);
-}
-
-static void advance_transaction(struct acpi_ec *ec, u8 status)
+static bool advance_transaction(struct acpi_ec *ec)
 {
-	unsigned long flags;
 	struct transaction *t;
+	u8 status;
+	bool wakeup = false;
 
-	spin_lock_irqsave(&ec->lock, flags);
+	pr_debug("===== %s =====\n", in_interrupt() ? "IRQ" : "TASK");
+	status = acpi_ec_read_status(ec);
 	t = ec->curr;
 	if (!t)
-		goto unlock;
-	if (t->wlen > t->wi) {
-		if ((status & ACPI_EC_FLAG_IBF) == 0)
-			acpi_ec_write_data(ec,
-				t->wdata[t->wi++]);
-		else
-			goto err;
-	} else if (t->rlen > t->ri) {
-		if ((status & ACPI_EC_FLAG_OBF) == 1) {
-			t->rdata[t->ri++] = acpi_ec_read_data(ec);
-			if (t->rlen == t->ri)
-				t->done = true;
+		goto err;
+	if (t->flags & ACPI_EC_COMMAND_POLL) {
+		if (t->wlen > t->wi) {
+			if ((status & ACPI_EC_FLAG_IBF) == 0)
+				acpi_ec_write_data(ec, t->wdata[t->wi++]);
+			else
+				goto err;
+		} else if (t->rlen > t->ri) {
+			if ((status & ACPI_EC_FLAG_OBF) == 1) {
+				t->rdata[t->ri++] = acpi_ec_read_data(ec);
+				if (t->rlen == t->ri) {
+					t->flags |= ACPI_EC_COMMAND_COMPLETE;
+					wakeup = true;
+				}
+			} else
+				goto err;
+		} else if (t->wlen == t->wi &&
+			   (status & ACPI_EC_FLAG_IBF) == 0) {
+			t->flags |= ACPI_EC_COMMAND_COMPLETE;
+			wakeup = true;
+		}
+		return wakeup;
+	} else {
+		if ((status & ACPI_EC_FLAG_IBF) == 0) {
+			acpi_ec_write_cmd(ec, t->command);
+			t->flags |= ACPI_EC_COMMAND_POLL;
 		} else
 			goto err;
-	} else if (t->wlen == t->wi &&
-		   (status & ACPI_EC_FLAG_IBF) == 0)
-		t->done = true;
-	goto unlock;
+		return wakeup;
+	}
 err:
 	/*
 	 * If SCI bit is set, then don't think it's a false IRQ
 	 * otherwise will take a not handled IRQ as a false one.
 	 */
-	if (in_interrupt() && !(status & ACPI_EC_FLAG_SCI))
-		++t->irq_count;
+	if (!(status & ACPI_EC_FLAG_SCI)) {
+		if (in_interrupt() && t)
+			++t->irq_count;
+	}
+	return wakeup;
+}
 
-unlock:
-	spin_unlock_irqrestore(&ec->lock, flags);
+static void start_transaction(struct acpi_ec *ec)
+{
+	ec->curr->irq_count = ec->curr->wi = ec->curr->ri = 0;
+	ec->curr->flags = 0;
+	(void)advance_transaction(ec);
 }
 
 static int acpi_ec_sync_query(struct acpi_ec *ec, u8 *data);
@@ -228,15 +245,17 @@ static int ec_poll(struct acpi_ec *ec)
 			/* don't sleep with disabled interrupts */
 			if (EC_FLAGS_MSI || irqs_disabled()) {
 				udelay(ACPI_EC_MSI_UDELAY);
-				if (ec_transaction_done(ec))
+				if (ec_transaction_completed(ec))
 					return 0;
 			} else {
 				if (wait_event_timeout(ec->wait,
-						ec_transaction_done(ec),
+						ec_transaction_completed(ec),
 						msecs_to_jiffies(1)))
 					return 0;
 			}
-			advance_transaction(ec, acpi_ec_read_status(ec));
+			spin_lock_irqsave(&ec->lock, flags);
+			(void)advance_transaction(ec);
+			spin_unlock_irqrestore(&ec->lock, flags);
 		} while (time_before(jiffies, delay));
 		pr_debug("controller reset, restart transaction\n");
 		spin_lock_irqsave(&ec->lock, flags);
@@ -268,23 +287,6 @@ static int acpi_ec_transaction_unlocked(
 	return ret;
 }
 
-static int ec_check_ibf0(struct acpi_ec *ec)
-{
-	u8 status = acpi_ec_read_status(ec);
-	return (status & ACPI_EC_FLAG_IBF) == 0;
-}
-
-static int ec_wait_ibf0(struct acpi_ec *ec)
-{
-	unsigned long delay = jiffies + msecs_to_jiffies(ec_delay);
-	/* interrupt wait manually if GPE mode is not active */
-	while (time_before(jiffies, delay))
-		if (wait_event_timeout(ec->wait, ec_check_ibf0(ec),
-					msecs_to_jiffies(1)))
-			return 0;
-	return -ETIME;
-}
-
 static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t)
 {
 	int status;
@@ -305,12 +307,6 @@ static int acpi_ec_transaction(struct ac
 			goto unlock;
 		}
 	}
-	if (ec_wait_ibf0(ec)) {
-		pr_err("input buffer is not empty, "
-				"aborting transaction\n");
-		status = -ETIME;
-		goto end;
-	}
 	pr_debug("transaction start (cmd=0x%02x, addr=0x%02x)\n",
 			t->command, t->wdata ? t->wdata[0] : 0);
 	/* disable GPE during transaction if storm is detected */
@@ -334,7 +330,6 @@ static int acpi_ec_transaction(struct ac
 		set_bit(EC_FLAGS_GPE_STORM, &ec->flags);
 	}
 	pr_debug("transaction end\n");
-end:
 	if (ec->global_lock)
 		acpi_release_global_lock(glk);
 unlock:
@@ -634,17 +629,14 @@ static int ec_check_sci(struct acpi_ec *
 static u32 acpi_ec_gpe_handler(acpi_handle gpe_device,
 	u32 gpe_number, void *data)
 {
+	unsigned long flags;
 	struct acpi_ec *ec = data;
-	u8 status = acpi_ec_read_status(ec);
-
-	pr_debug("~~~> interrupt, status:0x%02x\n", status);
 
-	advance_transaction(ec, status);
-	if (ec_transaction_done(ec) &&
-	    (acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF) == 0) {
+	spin_lock_irqsave(&ec->lock, flags);
+	if (advance_transaction(ec))
 		wake_up(&ec->wait);
-		ec_check_sci(ec, acpi_ec_read_status(ec));
-	}
+	spin_unlock_irqrestore(&ec->lock, flags);
+	ec_check_sci(ec, acpi_ec_read_status(ec));
 	return ACPI_INTERRUPT_HANDLED | ACPI_REENABLE_GPE;
 }
 
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/acpi/resource.c linux-libre-3.15.6-gnu/drivers/acpi/resource.c
--- linux-libre-3.15.5-gnu/drivers/acpi/resource.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/acpi/resource.c	2014-07-17 19:23:31.000000000 -0400
@@ -77,7 +77,7 @@ bool acpi_dev_resource_memory(struct acp
 	switch (ares->type) {
 	case ACPI_RESOURCE_TYPE_MEMORY24:
 		memory24 = &ares->data.memory24;
-		if (!memory24->address_length)
+		if (!memory24->minimum && !memory24->address_length)
 			return false;
 		acpi_dev_get_memresource(res, memory24->minimum,
 					 memory24->address_length,
@@ -85,7 +85,7 @@ bool acpi_dev_resource_memory(struct acp
 		break;
 	case ACPI_RESOURCE_TYPE_MEMORY32:
 		memory32 = &ares->data.memory32;
-		if (!memory32->address_length)
+		if (!memory32->minimum && !memory32->address_length)
 			return false;
 		acpi_dev_get_memresource(res, memory32->minimum,
 					 memory32->address_length,
@@ -93,7 +93,7 @@ bool acpi_dev_resource_memory(struct acp
 		break;
 	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
 		fixed_memory32 = &ares->data.fixed_memory32;
-		if (!fixed_memory32->address_length)
+		if (!fixed_memory32->address && !fixed_memory32->address_length)
 			return false;
 		acpi_dev_get_memresource(res, fixed_memory32->address,
 					 fixed_memory32->address_length,
@@ -150,7 +150,7 @@ bool acpi_dev_resource_io(struct acpi_re
 	switch (ares->type) {
 	case ACPI_RESOURCE_TYPE_IO:
 		io = &ares->data.io;
-		if (!io->address_length)
+		if (!io->minimum && !io->address_length)
 			return false;
 		acpi_dev_get_ioresource(res, io->minimum,
 					io->address_length,
@@ -158,7 +158,7 @@ bool acpi_dev_resource_io(struct acpi_re
 		break;
 	case ACPI_RESOURCE_TYPE_FIXED_IO:
 		fixed_io = &ares->data.fixed_io;
-		if (!fixed_io->address_length)
+		if (!fixed_io->address && !fixed_io->address_length)
 			return false;
 		acpi_dev_get_ioresource(res, fixed_io->address,
 					fixed_io->address_length,
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/ata/ahci_imx.c linux-libre-3.15.6-gnu/drivers/ata/ahci_imx.c
--- linux-libre-3.15.5-gnu/drivers/ata/ahci_imx.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/ata/ahci_imx.c	2014-07-17 19:23:31.000000000 -0400
@@ -58,6 +58,8 @@ enum ahci_imx_type {
 struct imx_ahci_priv {
 	struct platform_device *ahci_pdev;
 	enum ahci_imx_type type;
+	struct clk *sata_clk;
+	struct clk *sata_ref_clk;
 	struct clk *ahb_clk;
 	struct regmap *gpr;
 	bool no_device;
@@ -224,7 +226,7 @@ static int imx_sata_enable(struct ahci_h
 			return ret;
 	}
 
-	ret = ahci_platform_enable_clks(hpriv);
+	ret = clk_prepare_enable(imxpriv->sata_ref_clk);
 	if (ret < 0)
 		goto disable_regulator;
 
@@ -291,7 +293,7 @@ static void imx_sata_disable(struct ahci
 				   !IMX6Q_GPR13_SATA_MPLL_CLK_EN);
 	}
 
-	ahci_platform_disable_clks(hpriv);
+	clk_disable_unprepare(imxpriv->sata_ref_clk);
 
 	if (hpriv->target_pwr)
 		regulator_disable(hpriv->target_pwr);
@@ -385,6 +387,19 @@ static int imx_ahci_probe(struct platfor
 	imxpriv->no_device = false;
 	imxpriv->first_time = true;
 	imxpriv->type = (enum ahci_imx_type)of_id->data;
+
+	imxpriv->sata_clk = devm_clk_get(dev, "sata");
+	if (IS_ERR(imxpriv->sata_clk)) {
+		dev_err(dev, "can't get sata clock.\n");
+		return PTR_ERR(imxpriv->sata_clk);
+	}
+
+	imxpriv->sata_ref_clk = devm_clk_get(dev, "sata_ref");
+	if (IS_ERR(imxpriv->sata_ref_clk)) {
+		dev_err(dev, "can't get sata_ref clock.\n");
+		return PTR_ERR(imxpriv->sata_ref_clk);
+	}
+
 	imxpriv->ahb_clk = devm_clk_get(dev, "ahb");
 	if (IS_ERR(imxpriv->ahb_clk)) {
 		dev_err(dev, "can't get ahb clock.\n");
@@ -407,10 +422,14 @@ static int imx_ahci_probe(struct platfor
 
 	hpriv->plat_data = imxpriv;
 
-	ret = imx_sata_enable(hpriv);
+	ret = clk_prepare_enable(imxpriv->sata_clk);
 	if (ret)
 		return ret;
 
+	ret = imx_sata_enable(hpriv);
+	if (ret)
+		goto disable_clk;
+
 	/*
 	 * Configure the HWINIT bits of the HOST_CAP and HOST_PORTS_IMPL,
 	 * and IP vendor specific register IMX_TIMER1MS.
@@ -434,16 +453,24 @@ static int imx_ahci_probe(struct platfor
 
 	ret = ahci_platform_init_host(pdev, hpriv, &ahci_imx_port_info, 0, 0);
 	if (ret)
-		imx_sata_disable(hpriv);
+		goto disable_sata;
 
+	return 0;
+
+disable_sata:
+	imx_sata_disable(hpriv);
+disable_clk:
+	clk_disable_unprepare(imxpriv->sata_clk);
 	return ret;
 }
 
 static void ahci_imx_host_stop(struct ata_host *host)
 {
 	struct ahci_host_priv *hpriv = host->private_data;
+	struct imx_ahci_priv *imxpriv = hpriv->plat_data;
 
 	imx_sata_disable(hpriv);
+	clk_disable_unprepare(imxpriv->sata_clk);
 }
 
 #ifdef CONFIG_PM_SLEEP
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/base/dma-contiguous.c linux-libre-3.15.6-gnu/drivers/base/dma-contiguous.c
--- linux-libre-3.15.5-gnu/drivers/base/dma-contiguous.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/base/dma-contiguous.c	2014-07-17 19:23:31.000000000 -0400
@@ -155,13 +155,23 @@ static int __init cma_activate_area(stru
 		base_pfn = pfn;
 		for (j = pageblock_nr_pages; j; --j, pfn++) {
 			WARN_ON_ONCE(!pfn_valid(pfn));
+			/*
+			 * alloc_contig_range requires the pfn range
+			 * specified to be in the same zone. Make this
+			 * simple by forcing the entire CMA resv range
+			 * to be in the same zone.
+			 */
 			if (page_zone(pfn_to_page(pfn)) != zone)
-				return -EINVAL;
+				goto err;
 		}
 		init_cma_reserved_pageblock(pfn_to_page(base_pfn));
 	} while (--i);
 
 	return 0;
+
+err:
+	kfree(cma->bitmap);
+	return -EINVAL;
 }
 
 static struct cma cma_areas[MAX_CMA_AREAS];
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/char/i8k.c linux-libre-3.15.6-gnu/drivers/char/i8k.c
--- linux-libre-3.15.5-gnu/drivers/char/i8k.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/char/i8k.c	2014-07-17 19:23:31.000000000 -0400
@@ -138,7 +138,9 @@ static int i8k_smm(struct smm_regs *regs
 	if (!alloc_cpumask_var(&old_mask, GFP_KERNEL))
 		return -ENOMEM;
 	cpumask_copy(old_mask, &current->cpus_allowed);
-	set_cpus_allowed_ptr(current, cpumask_of(0));
+	rc = set_cpus_allowed_ptr(current, cpumask_of(0));
+	if (rc)
+		goto out;
 	if (smp_processor_id() != 0) {
 		rc = -EBUSY;
 		goto out;
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/clk/clk-s2mps11.c linux-libre-3.15.6-gnu/drivers/clk/clk-s2mps11.c
--- linux-libre-3.15.5-gnu/drivers/clk/clk-s2mps11.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/clk/clk-s2mps11.c	2014-07-17 19:23:31.000000000 -0400
@@ -206,16 +206,13 @@ static int s2mps11_clk_probe(struct plat
 			goto err_reg;
 		}
 
-		s2mps11_clk->lookup = devm_kzalloc(&pdev->dev,
-					sizeof(struct clk_lookup), GFP_KERNEL);
+		s2mps11_clk->lookup = clkdev_alloc(s2mps11_clk->clk,
+					s2mps11_name(s2mps11_clk), NULL);
 		if (!s2mps11_clk->lookup) {
 			ret = -ENOMEM;
 			goto err_lup;
 		}
 
-		s2mps11_clk->lookup->con_id = s2mps11_name(s2mps11_clk);
-		s2mps11_clk->lookup->clk = s2mps11_clk->clk;
-
 		clkdev_add(s2mps11_clk->lookup);
 	}
 
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/clk/qcom/mmcc-msm8960.c linux-libre-3.15.6-gnu/drivers/clk/qcom/mmcc-msm8960.c
--- linux-libre-3.15.5-gnu/drivers/clk/qcom/mmcc-msm8960.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/clk/qcom/mmcc-msm8960.c	2014-07-17 19:23:31.000000000 -0400
@@ -1208,7 +1208,7 @@ static struct clk_branch rot_clk = {
 
 static u8 mmcc_pxo_hdmi_map[] = {
 	[P_PXO]		= 0,
-	[P_HDMI_PLL]	= 2,
+	[P_HDMI_PLL]	= 3,
 };
 
 static const char *mmcc_pxo_hdmi[] = {
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/clk/spear/spear3xx_clock.c linux-libre-3.15.6-gnu/drivers/clk/spear/spear3xx_clock.c
--- linux-libre-3.15.5-gnu/drivers/clk/spear/spear3xx_clock.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/clk/spear/spear3xx_clock.c	2014-07-17 19:23:31.000000000 -0400
@@ -211,7 +211,7 @@ static inline void spear310_clk_init(voi
 /* array of all spear 320 clock lookups */
 #ifdef CONFIG_MACH_SPEAR320
 
-#define SPEAR320_CONTROL_REG		(soc_config_base + 0x0000)
+#define SPEAR320_CONTROL_REG		(soc_config_base + 0x0010)
 #define SPEAR320_EXT_CTRL_REG		(soc_config_base + 0x0018)
 
 	#define SPEAR320_UARTX_PCLK_MASK		0x1
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/cpufreq/intel_pstate.c linux-libre-3.15.6-gnu/drivers/cpufreq/intel_pstate.c
--- linux-libre-3.15.5-gnu/drivers/cpufreq/intel_pstate.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/cpufreq/intel_pstate.c	2014-07-17 19:23:31.000000000 -0400
@@ -132,6 +132,7 @@ static struct pstate_funcs pstate_funcs;
 
 struct perf_limits {
 	int no_turbo;
+	int turbo_disabled;
 	int max_perf_pct;
 	int min_perf_pct;
 	int32_t max_perf;
@@ -291,7 +292,10 @@ static ssize_t store_no_turbo(struct kob
 	if (ret != 1)
 		return -EINVAL;
 	limits.no_turbo = clamp_t(int, input, 0 , 1);
-
+	if (limits.turbo_disabled) {
+		pr_warn("Turbo disabled by BIOS or unavailable on processor\n");
+		limits.no_turbo = limits.turbo_disabled;
+	}
 	return count;
 }
 
@@ -361,21 +365,21 @@ static int byt_get_min_pstate(void)
 {
 	u64 value;
 	rdmsrl(BYT_RATIOS, value);
-	return (value >> 8) & 0x3F;
+	return (value >> 8) & 0x7F;
 }
 
 static int byt_get_max_pstate(void)
 {
 	u64 value;
 	rdmsrl(BYT_RATIOS, value);
-	return (value >> 16) & 0x3F;
+	return (value >> 16) & 0x7F;
 }
 
 static int byt_get_turbo_pstate(void)
 {
 	u64 value;
 	rdmsrl(BYT_TURBO_RATIOS, value);
-	return value & 0x3F;
+	return value & 0x7F;
 }
 
 static void byt_set_pstate(struct cpudata *cpudata, int pstate)
@@ -385,7 +389,7 @@ static void byt_set_pstate(struct cpudat
 	u32 vid;
 
 	val = pstate << 8;
-	if (limits.no_turbo)
+	if (limits.no_turbo && !limits.turbo_disabled)
 		val |= (u64)1 << 32;
 
 	vid_fp = cpudata->vid.min + mul_fp(
@@ -409,8 +413,8 @@ static void byt_get_vid(struct cpudata *
 
 
 	rdmsrl(BYT_VIDS, value);
-	cpudata->vid.min = int_tofp((value >> 8) & 0x3f);
-	cpudata->vid.max = int_tofp((value >> 16) & 0x3f);
+	cpudata->vid.min = int_tofp((value >> 8) & 0x7f);
+	cpudata->vid.max = int_tofp((value >> 16) & 0x7f);
 	cpudata->vid.ratio = div_fp(
 		cpudata->vid.max - cpudata->vid.min,
 		int_tofp(cpudata->pstate.max_pstate -
@@ -452,7 +456,7 @@ static void core_set_pstate(struct cpuda
 	u64 val;
 
 	val = pstate << 8;
-	if (limits.no_turbo)
+	if (limits.no_turbo && !limits.turbo_disabled)
 		val |= (u64)1 << 32;
 
 	wrmsrl_on_cpu(cpudata->cpu, MSR_IA32_PERF_CTL, val);
@@ -705,9 +709,8 @@ static int intel_pstate_init_cpu(unsigne
 
 	cpu = all_cpu_data[cpunum];
 
-	intel_pstate_get_cpu_pstates(cpu);
-
 	cpu->cpu = cpunum;
+	intel_pstate_get_cpu_pstates(cpu);
 
 	init_timer_deferrable(&cpu->timer);
 	cpu->timer.function = intel_pstate_timer_func;
@@ -750,7 +753,7 @@ static int intel_pstate_set_policy(struc
 		limits.min_perf = int_tofp(1);
 		limits.max_perf_pct = 100;
 		limits.max_perf = int_tofp(1);
-		limits.no_turbo = 0;
+		limits.no_turbo = limits.turbo_disabled;
 		return 0;
 	}
 	limits.min_perf_pct = (policy->min * 100) / policy->cpuinfo.max_freq;
@@ -793,6 +796,7 @@ static int intel_pstate_cpu_init(struct
 {
 	struct cpudata *cpu;
 	int rc;
+	u64 misc_en;
 
 	rc = intel_pstate_init_cpu(policy->cpu);
 	if (rc)
@@ -800,8 +804,13 @@ static int intel_pstate_cpu_init(struct
 
 	cpu = all_cpu_data[policy->cpu];
 
-	if (!limits.no_turbo &&
-		limits.min_perf_pct == 100 && limits.max_perf_pct == 100)
+	rdmsrl(MSR_IA32_MISC_ENABLE, misc_en);
+	if (misc_en & MSR_IA32_MISC_ENABLE_TURBO_DISABLE ||
+		cpu->pstate.max_pstate == cpu->pstate.turbo_pstate) {
+		limits.turbo_disabled = 1;
+		limits.no_turbo = 1;
+	}
+	if (limits.min_perf_pct == 100 && limits.max_perf_pct == 100)
 		policy->policy = CPUFREQ_POLICY_PERFORMANCE;
 	else
 		policy->policy = CPUFREQ_POLICY_POWERSAVE;
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/cpufreq/Makefile linux-libre-3.15.6-gnu/drivers/cpufreq/Makefile
--- linux-libre-3.15.5-gnu/drivers/cpufreq/Makefile	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/cpufreq/Makefile	2014-07-17 19:23:31.000000000 -0400
@@ -47,7 +47,7 @@ obj-$(CONFIG_ARM_BIG_LITTLE_CPUFREQ)	+=
 # LITTLE drivers, so that it is probed last.
 obj-$(CONFIG_ARM_DT_BL_CPUFREQ)		+= arm_big_little_dt.o
 
-obj-$(CONFIG_ARCH_DAVINCI_DA850)	+= davinci-cpufreq.o
+obj-$(CONFIG_ARCH_DAVINCI)		+= davinci-cpufreq.o
 obj-$(CONFIG_UX500_SOC_DB8500)		+= dbx500-cpufreq.o
 obj-$(CONFIG_ARM_EXYNOS_CPUFREQ)	+= exynos-cpufreq.o
 obj-$(CONFIG_ARM_EXYNOS4210_CPUFREQ)	+= exynos4210-cpufreq.o
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/crypto/caam/jr.c linux-libre-3.15.6-gnu/drivers/crypto/caam/jr.c
--- linux-libre-3.15.5-gnu/drivers/crypto/caam/jr.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/crypto/caam/jr.c	2014-07-17 19:23:31.000000000 -0400
@@ -453,8 +453,8 @@ static int caam_jr_probe(struct platform
 	int error;
 
 	jrdev = &pdev->dev;
-	jrpriv = kmalloc(sizeof(struct caam_drv_private_jr),
-			 GFP_KERNEL);
+	jrpriv = devm_kmalloc(jrdev, sizeof(struct caam_drv_private_jr),
+			      GFP_KERNEL);
 	if (!jrpriv)
 		return -ENOMEM;
 
@@ -487,10 +487,8 @@ static int caam_jr_probe(struct platform
 
 	/* Now do the platform independent part */
 	error = caam_jr_init(jrdev); /* now turn on hardware */
-	if (error) {
-		kfree(jrpriv);
+	if (error)
 		return error;
-	}
 
 	jrpriv->dev = jrdev;
 	spin_lock(&driver_data.jr_alloc_lock);
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/gpu/drm/i915/i915_drv.h linux-libre-3.15.6-gnu/drivers/gpu/drm/i915/i915_drv.h
--- linux-libre-3.15.5-gnu/drivers/gpu/drm/i915/i915_drv.h	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/gpu/drm/i915/i915_drv.h	2014-07-17 19:23:31.000000000 -0400
@@ -803,6 +803,7 @@ enum intel_sbi_destination {
 #define QUIRK_PIPEA_FORCE (1<<0)
 #define QUIRK_LVDS_SSC_DISABLE (1<<1)
 #define QUIRK_INVERT_BRIGHTNESS (1<<2)
+#define QUIRK_BACKLIGHT_PRESENT (1<<3)
 
 struct intel_fbdev;
 struct intel_fbc_work;
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/gpu/drm/i915/i915_gem_stolen.c linux-libre-3.15.6-gnu/drivers/gpu/drm/i915/i915_gem_stolen.c
--- linux-libre-3.15.5-gnu/drivers/gpu/drm/i915/i915_gem_stolen.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/gpu/drm/i915/i915_gem_stolen.c	2014-07-17 19:23:31.000000000 -0400
@@ -74,6 +74,50 @@ static unsigned long i915_stolen_to_phys
 	if (base == 0)
 		return 0;
 
+	/* make sure we don't clobber the GTT if it's within stolen memory */
+	if (INTEL_INFO(dev)->gen <= 4 && !IS_G33(dev) && !IS_G4X(dev)) {
+		struct {
+			u32 start, end;
+		} stolen[2] = {
+			{ .start = base, .end = base + dev_priv->gtt.stolen_size, },
+			{ .start = base, .end = base + dev_priv->gtt.stolen_size, },
+		};
+		u64 gtt_start, gtt_end;
+
+		gtt_start = I915_READ(PGTBL_CTL);
+		if (IS_GEN4(dev))
+			gtt_start = (gtt_start & PGTBL_ADDRESS_LO_MASK) |
+				(gtt_start & PGTBL_ADDRESS_HI_MASK) << 28;
+		else
+			gtt_start &= PGTBL_ADDRESS_LO_MASK;
+		gtt_end = gtt_start + gtt_total_entries(dev_priv->gtt) * 4;
+
+		if (gtt_start >= stolen[0].start && gtt_start < stolen[0].end)
+			stolen[0].end = gtt_start;
+		if (gtt_end > stolen[1].start && gtt_end <= stolen[1].end)
+			stolen[1].start = gtt_end;
+
+		/* pick the larger of the two chunks */
+		if (stolen[0].end - stolen[0].start >
+		    stolen[1].end - stolen[1].start) {
+			base = stolen[0].start;
+			dev_priv->gtt.stolen_size = stolen[0].end - stolen[0].start;
+		} else {
+			base = stolen[1].start;
+			dev_priv->gtt.stolen_size = stolen[1].end - stolen[1].start;
+		}
+
+		if (stolen[0].start != stolen[1].start ||
+		    stolen[0].end != stolen[1].end) {
+			DRM_DEBUG_KMS("GTT within stolen memory at 0x%llx-0x%llx\n",
+				      (unsigned long long) gtt_start,
+				      (unsigned long long) gtt_end - 1);
+			DRM_DEBUG_KMS("Stolen memory adjusted to 0x%x-0x%x\n",
+				      base, base + (u32) dev_priv->gtt.stolen_size - 1);
+		}
+	}
+
+
 	/* Verify that nothing else uses this physical address. Stolen
 	 * memory should be reserved by the BIOS and hidden from the
 	 * kernel. So if the region is already marked as busy, something
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/gpu/drm/i915/i915_reg.h linux-libre-3.15.6-gnu/drivers/gpu/drm/i915/i915_reg.h
--- linux-libre-3.15.5-gnu/drivers/gpu/drm/i915/i915_reg.h	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/gpu/drm/i915/i915_reg.h	2014-07-17 19:23:31.000000000 -0400
@@ -659,6 +659,9 @@ enum punit_power_well {
 /*
  * Instruction and interrupt control regs
  */
+#define PGTBL_CTL	0x02020
+#define   PGTBL_ADDRESS_LO_MASK	0xfffff000 /* bits [31:12] */
+#define   PGTBL_ADDRESS_HI_MASK	0x000000f0 /* bits [35:32] (gen4) */
 #define PGTBL_ER	0x02024
 #define RENDER_RING_BASE	0x02000
 #define BSD_RING_BASE		0x04000
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/gpu/drm/i915/intel_display.c linux-libre-3.15.6-gnu/drivers/gpu/drm/i915/intel_display.c
--- linux-libre-3.15.5-gnu/drivers/gpu/drm/i915/intel_display.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/gpu/drm/i915/intel_display.c	2014-07-17 19:23:31.000000000 -0400
@@ -11166,6 +11166,14 @@ static void quirk_invert_brightness(stru
 	DRM_INFO("applying inverted panel brightness quirk\n");
 }
 
+/* Some VBT's incorrectly indicate no backlight is present */
+static void quirk_backlight_present(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	dev_priv->quirks |= QUIRK_BACKLIGHT_PRESENT;
+	DRM_INFO("applying backlight present quirk\n");
+}
+
 struct intel_quirk {
 	int device;
 	int subsystem_vendor;
@@ -11237,6 +11245,12 @@ static struct intel_quirk intel_quirks[]
 
 	/* Acer Aspire 5336 */
 	{ 0x2a42, 0x1025, 0x048a, quirk_invert_brightness },
+
+	/* Acer C720 and C720P Chromebooks (Celeron 2955U) have backlights */
+	{ 0x0a06, 0x1025, 0x0a11, quirk_backlight_present },
+
+	/* Toshiba CB35 Chromebook (Celeron 2955U) */
+	{ 0x0a06, 0x1179, 0x0a88, quirk_backlight_present },
 };
 
 static void intel_init_quirks(struct drm_device *dev)
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/gpu/drm/i915/intel_panel.c linux-libre-3.15.6-gnu/drivers/gpu/drm/i915/intel_panel.c
--- linux-libre-3.15.5-gnu/drivers/gpu/drm/i915/intel_panel.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/gpu/drm/i915/intel_panel.c	2014-07-17 19:23:31.000000000 -0400
@@ -1065,8 +1065,12 @@ int intel_panel_setup_backlight(struct d
 	int ret;
 
 	if (!dev_priv->vbt.backlight.present) {
-		DRM_DEBUG_KMS("native backlight control not available per VBT\n");
-		return 0;
+		if (dev_priv->quirks & QUIRK_BACKLIGHT_PRESENT) {
+			DRM_DEBUG_KMS("no backlight present per VBT, but present per quirk\n");
+		} else {
+			DRM_DEBUG_KMS("no backlight present per VBT\n");
+			return 0;
+		}
 	}
 
 	/* set level and max in panel struct */
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/gpu/drm/radeon/ci_dpm.c linux-libre-3.15.6-gnu/drivers/gpu/drm/radeon/ci_dpm.c
--- linux-libre-3.15.5-gnu/drivers/gpu/drm/radeon/ci_dpm.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/gpu/drm/radeon/ci_dpm.c	2014-07-17 19:23:31.000000000 -0400
@@ -1179,7 +1179,7 @@ static int ci_stop_dpm(struct radeon_dev
 	tmp &= ~GLOBAL_PWRMGT_EN;
 	WREG32_SMC(GENERAL_PWRMGT, tmp);
 
-	tmp = RREG32(SCLK_PWRMGT_CNTL);
+	tmp = RREG32_SMC(SCLK_PWRMGT_CNTL);
 	tmp &= ~DYNAMIC_PM_EN;
 	WREG32_SMC(SCLK_PWRMGT_CNTL, tmp);
 
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/gpu/drm/radeon/evergreen.c linux-libre-3.15.6-gnu/drivers/gpu/drm/radeon/evergreen.c
--- linux-libre-3.15.5-gnu/drivers/gpu/drm/radeon/evergreen.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/gpu/drm/radeon/evergreen.c	2014-07-17 19:23:31.000000000 -0400
@@ -189,7 +189,7 @@ static const u32 evergreen_golden_regist
 	0x8c1c, 0xffffffff, 0x00001010,
 	0x28350, 0xffffffff, 0x00000000,
 	0xa008, 0xffffffff, 0x00010000,
-	0x5cc, 0xffffffff, 0x00000001,
+	0x5c4, 0xffffffff, 0x00000001,
 	0x9508, 0xffffffff, 0x00000002,
 	0x913c, 0x0000000f, 0x0000000a
 };
@@ -476,7 +476,7 @@ static const u32 cedar_golden_registers[
 	0x8c1c, 0xffffffff, 0x00001010,
 	0x28350, 0xffffffff, 0x00000000,
 	0xa008, 0xffffffff, 0x00010000,
-	0x5cc, 0xffffffff, 0x00000001,
+	0x5c4, 0xffffffff, 0x00000001,
 	0x9508, 0xffffffff, 0x00000002
 };
 
@@ -635,7 +635,7 @@ static const u32 juniper_mgcg_init[] =
 static const u32 supersumo_golden_registers[] =
 {
 	0x5eb4, 0xffffffff, 0x00000002,
-	0x5cc, 0xffffffff, 0x00000001,
+	0x5c4, 0xffffffff, 0x00000001,
 	0x7030, 0xffffffff, 0x00000011,
 	0x7c30, 0xffffffff, 0x00000011,
 	0x6104, 0x01000300, 0x00000000,
@@ -719,7 +719,7 @@ static const u32 sumo_golden_registers[]
 static const u32 wrestler_golden_registers[] =
 {
 	0x5eb4, 0xffffffff, 0x00000002,
-	0x5cc, 0xffffffff, 0x00000001,
+	0x5c4, 0xffffffff, 0x00000001,
 	0x7030, 0xffffffff, 0x00000011,
 	0x7c30, 0xffffffff, 0x00000011,
 	0x6104, 0x01000300, 0x00000000,
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/gpu/drm/radeon/radeon_vm.c linux-libre-3.15.6-gnu/drivers/gpu/drm/radeon/radeon_vm.c
--- linux-libre-3.15.5-gnu/drivers/gpu/drm/radeon/radeon_vm.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/gpu/drm/radeon/radeon_vm.c	2014-07-17 19:23:31.000000000 -0400
@@ -493,7 +493,7 @@ int radeon_vm_bo_set_addr(struct radeon_
 		mutex_unlock(&vm->mutex);
 
 		r = radeon_bo_create(rdev, RADEON_VM_PTE_COUNT * 8,
-				     RADEON_GPU_PAGE_SIZE, false, 
+				     RADEON_GPU_PAGE_SIZE, true,
 				     RADEON_GEM_DOMAIN_VRAM, NULL, &pt);
 		if (r)
 			return r;
@@ -913,7 +913,7 @@ int radeon_vm_init(struct radeon_device
 		return -ENOMEM;
 	}
 
-	r = radeon_bo_create(rdev, pd_size, RADEON_VM_PTB_ALIGN_SIZE, false,
+	r = radeon_bo_create(rdev, pd_size, RADEON_VM_PTB_ALIGN_SIZE, true,
 			     RADEON_GEM_DOMAIN_VRAM, NULL,
 			     &vm->page_directory);
 	if (r)
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/gpu/drm/radeon/rs600.c linux-libre-3.15.6-gnu/drivers/gpu/drm/radeon/rs600.c
--- linux-libre-3.15.5-gnu/drivers/gpu/drm/radeon/rs600.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/gpu/drm/radeon/rs600.c	2014-07-17 19:23:31.000000000 -0400
@@ -646,8 +646,10 @@ int rs600_gart_set_page(struct radeon_de
 		return -EINVAL;
 	}
 	addr = addr & 0xFFFFFFFFFFFFF000ULL;
-	addr |= R600_PTE_VALID | R600_PTE_SYSTEM | R600_PTE_SNOOPED;
-	addr |= R600_PTE_READABLE | R600_PTE_WRITEABLE;
+	if (addr != rdev->dummy_page.addr)
+		addr |= R600_PTE_VALID | R600_PTE_READABLE |
+			R600_PTE_WRITEABLE;
+	addr |= R600_PTE_SYSTEM | R600_PTE_SNOOPED;
 	writeq(addr, ptr + (i * 8));
 	return 0;
 }
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/gpu/drm/radeon/rv770_dpm.c linux-libre-3.15.6-gnu/drivers/gpu/drm/radeon/rv770_dpm.c
--- linux-libre-3.15.5-gnu/drivers/gpu/drm/radeon/rv770_dpm.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/gpu/drm/radeon/rv770_dpm.c	2014-07-17 19:23:31.000000000 -0400
@@ -2329,12 +2329,6 @@ void rv770_get_engine_memory_ss(struct r
 	pi->mclk_ss = radeon_atombios_get_asic_ss_info(rdev, &ss,
 						       ASIC_INTERNAL_MEMORY_SS, 0);
 
-	/* disable ss, causes hangs on some cayman boards */
-	if (rdev->family == CHIP_CAYMAN) {
-		pi->sclk_ss = false;
-		pi->mclk_ss = false;
-	}
-
 	if (pi->sclk_ss || pi->mclk_ss)
 		pi->dynamic_ss = true;
 	else
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/hv/connection.c linux-libre-3.15.6-gnu/drivers/hv/connection.c
--- linux-libre-3.15.5-gnu/drivers/hv/connection.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/hv/connection.c	2014-07-17 19:23:31.000000000 -0400
@@ -319,9 +319,13 @@ static void process_chn_event(u32 relid)
 		 */
 
 		do {
-			hv_begin_read(&channel->inbound);
+			if (read_state)
+				hv_begin_read(&channel->inbound);
 			channel->onchannel_callback(arg);
-			bytes_to_read = hv_end_read(&channel->inbound);
+			if (read_state)
+				bytes_to_read = hv_end_read(&channel->inbound);
+			else
+				bytes_to_read = 0;
 		} while (read_state && (bytes_to_read != 0));
 	} else {
 		pr_err("no channel callback for relid - %u\n", relid);
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/hwmon/adc128d818.c linux-libre-3.15.6-gnu/drivers/hwmon/adc128d818.c
--- linux-libre-3.15.5-gnu/drivers/hwmon/adc128d818.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/hwmon/adc128d818.c	2014-07-17 19:23:31.000000000 -0400
@@ -239,50 +239,50 @@ static ssize_t adc128_show_alarm(struct
 	return sprintf(buf, "%u\n", !!(alarms & mask));
 }
 
-static SENSOR_DEVICE_ATTR_2(in0_input, S_IWUSR | S_IRUGO,
-			    adc128_show_in, adc128_set_in, 0, 0);
+static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO,
+			    adc128_show_in, NULL, 0, 0);
 static SENSOR_DEVICE_ATTR_2(in0_min, S_IWUSR | S_IRUGO,
 			    adc128_show_in, adc128_set_in, 0, 1);
 static SENSOR_DEVICE_ATTR_2(in0_max, S_IWUSR | S_IRUGO,
 			    adc128_show_in, adc128_set_in, 0, 2);
 
-static SENSOR_DEVICE_ATTR_2(in1_input, S_IWUSR | S_IRUGO,
-			    adc128_show_in, adc128_set_in, 1, 0);
+static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO,
+			    adc128_show_in, NULL, 1, 0);
 static SENSOR_DEVICE_ATTR_2(in1_min, S_IWUSR | S_IRUGO,
 			    adc128_show_in, adc128_set_in, 1, 1);
 static SENSOR_DEVICE_ATTR_2(in1_max, S_IWUSR | S_IRUGO,
 			    adc128_show_in, adc128_set_in, 1, 2);
 
-static SENSOR_DEVICE_ATTR_2(in2_input, S_IWUSR | S_IRUGO,
-			    adc128_show_in, adc128_set_in, 2, 0);
+static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO,
+			    adc128_show_in, NULL, 2, 0);
 static SENSOR_DEVICE_ATTR_2(in2_min, S_IWUSR | S_IRUGO,
 			    adc128_show_in, adc128_set_in, 2, 1);
 static SENSOR_DEVICE_ATTR_2(in2_max, S_IWUSR | S_IRUGO,
 			    adc128_show_in, adc128_set_in, 2, 2);
 
-static SENSOR_DEVICE_ATTR_2(in3_input, S_IWUSR | S_IRUGO,
-			    adc128_show_in, adc128_set_in, 3, 0);
+static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO,
+			    adc128_show_in, NULL, 3, 0);
 static SENSOR_DEVICE_ATTR_2(in3_min, S_IWUSR | S_IRUGO,
 			    adc128_show_in, adc128_set_in, 3, 1);
 static SENSOR_DEVICE_ATTR_2(in3_max, S_IWUSR | S_IRUGO,
 			    adc128_show_in, adc128_set_in, 3, 2);
 
-static SENSOR_DEVICE_ATTR_2(in4_input, S_IWUSR | S_IRUGO,
-			    adc128_show_in, adc128_set_in, 4, 0);
+static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO,
+			    adc128_show_in, NULL, 4, 0);
 static SENSOR_DEVICE_ATTR_2(in4_min, S_IWUSR | S_IRUGO,
 			    adc128_show_in, adc128_set_in, 4, 1);
 static SENSOR_DEVICE_ATTR_2(in4_max, S_IWUSR | S_IRUGO,
 			    adc128_show_in, adc128_set_in, 4, 2);
 
-static SENSOR_DEVICE_ATTR_2(in5_input, S_IWUSR | S_IRUGO,
-			    adc128_show_in, adc128_set_in, 5, 0);
+static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO,
+			    adc128_show_in, NULL, 5, 0);
 static SENSOR_DEVICE_ATTR_2(in5_min, S_IWUSR | S_IRUGO,
 			    adc128_show_in, adc128_set_in, 5, 1);
 static SENSOR_DEVICE_ATTR_2(in5_max, S_IWUSR | S_IRUGO,
 			    adc128_show_in, adc128_set_in, 5, 2);
 
-static SENSOR_DEVICE_ATTR_2(in6_input, S_IWUSR | S_IRUGO,
-			    adc128_show_in, adc128_set_in, 6, 0);
+static SENSOR_DEVICE_ATTR_2(in6_input, S_IRUGO,
+			    adc128_show_in, NULL, 6, 0);
 static SENSOR_DEVICE_ATTR_2(in6_min, S_IWUSR | S_IRUGO,
 			    adc128_show_in, adc128_set_in, 6, 1);
 static SENSOR_DEVICE_ATTR_2(in6_max, S_IWUSR | S_IRUGO,
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/hwmon/adm1021.c linux-libre-3.15.6-gnu/drivers/hwmon/adm1021.c
--- linux-libre-3.15.5-gnu/drivers/hwmon/adm1021.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/hwmon/adm1021.c	2014-07-17 19:23:31.000000000 -0400
@@ -185,7 +185,7 @@ static ssize_t set_temp_max(struct devic
 	struct adm1021_data *data = dev_get_drvdata(dev);
 	struct i2c_client *client = data->client;
 	long temp;
-	int err;
+	int reg_val, err;
 
 	err = kstrtol(buf, 10, &temp);
 	if (err)
@@ -193,10 +193,11 @@ static ssize_t set_temp_max(struct devic
 	temp /= 1000;
 
 	mutex_lock(&data->update_lock);
-	data->temp_max[index] = clamp_val(temp, -128, 127);
+	reg_val = clamp_val(temp, -128, 127);
+	data->temp_max[index] = reg_val * 1000;
 	if (!read_only)
 		i2c_smbus_write_byte_data(client, ADM1021_REG_TOS_W(index),
-					  data->temp_max[index]);
+					  reg_val);
 	mutex_unlock(&data->update_lock);
 
 	return count;
@@ -210,7 +211,7 @@ static ssize_t set_temp_min(struct devic
 	struct adm1021_data *data = dev_get_drvdata(dev);
 	struct i2c_client *client = data->client;
 	long temp;
-	int err;
+	int reg_val, err;
 
 	err = kstrtol(buf, 10, &temp);
 	if (err)
@@ -218,10 +219,11 @@ static ssize_t set_temp_min(struct devic
 	temp /= 1000;
 
 	mutex_lock(&data->update_lock);
-	data->temp_min[index] = clamp_val(temp, -128, 127);
+	reg_val = clamp_val(temp, -128, 127);
+	data->temp_min[index] = reg_val * 1000;
 	if (!read_only)
 		i2c_smbus_write_byte_data(client, ADM1021_REG_THYST_W(index),
-					  data->temp_min[index]);
+					  reg_val);
 	mutex_unlock(&data->update_lock);
 
 	return count;
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/hwmon/adm1029.c linux-libre-3.15.6-gnu/drivers/hwmon/adm1029.c
--- linux-libre-3.15.5-gnu/drivers/hwmon/adm1029.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/hwmon/adm1029.c	2014-07-17 19:23:31.000000000 -0400
@@ -232,6 +232,9 @@ static ssize_t set_fan_div(struct device
 	/* Update the value */
 	reg = (reg & 0x3F) | (val << 6);
 
+	/* Update the cache */
+	data->fan_div[attr->index] = reg;
+
 	/* Write value */
 	i2c_smbus_write_byte_data(client,
 				  ADM1029_REG_FAN_DIV[attr->index], reg);
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/hwmon/adm1031.c linux-libre-3.15.6-gnu/drivers/hwmon/adm1031.c
--- linux-libre-3.15.5-gnu/drivers/hwmon/adm1031.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/hwmon/adm1031.c	2014-07-17 19:23:31.000000000 -0400
@@ -365,6 +365,7 @@ set_auto_temp_min(struct device *dev, st
 	if (ret)
 		return ret;
 
+	val = clamp_val(val, 0, 127000);
 	mutex_lock(&data->update_lock);
 	data->auto_temp[nr] = AUTO_TEMP_MIN_TO_REG(val, data->auto_temp[nr]);
 	adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
@@ -394,6 +395,7 @@ set_auto_temp_max(struct device *dev, st
 	if (ret)
 		return ret;
 
+	val = clamp_val(val, 0, 127000);
 	mutex_lock(&data->update_lock);
 	data->temp_max[nr] = AUTO_TEMP_MAX_TO_REG(val, data->auto_temp[nr],
 						  data->pwm[nr]);
@@ -696,7 +698,7 @@ static ssize_t set_temp_min(struct devic
 	if (ret)
 		return ret;
 
-	val = clamp_val(val, -55000, nr == 0 ? 127750 : 127875);
+	val = clamp_val(val, -55000, 127000);
 	mutex_lock(&data->update_lock);
 	data->temp_min[nr] = TEMP_TO_REG(val);
 	adm1031_write_value(client, ADM1031_REG_TEMP_MIN(nr),
@@ -717,7 +719,7 @@ static ssize_t set_temp_max(struct devic
 	if (ret)
 		return ret;
 
-	val = clamp_val(val, -55000, nr == 0 ? 127750 : 127875);
+	val = clamp_val(val, -55000, 127000);
 	mutex_lock(&data->update_lock);
 	data->temp_max[nr] = TEMP_TO_REG(val);
 	adm1031_write_value(client, ADM1031_REG_TEMP_MAX(nr),
@@ -738,7 +740,7 @@ static ssize_t set_temp_crit(struct devi
 	if (ret)
 		return ret;
 
-	val = clamp_val(val, -55000, nr == 0 ? 127750 : 127875);
+	val = clamp_val(val, -55000, 127000);
 	mutex_lock(&data->update_lock);
 	data->temp_crit[nr] = TEMP_TO_REG(val);
 	adm1031_write_value(client, ADM1031_REG_TEMP_CRIT(nr),
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/hwmon/amc6821.c linux-libre-3.15.6-gnu/drivers/hwmon/amc6821.c
--- linux-libre-3.15.5-gnu/drivers/hwmon/amc6821.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/hwmon/amc6821.c	2014-07-17 19:23:31.000000000 -0400
@@ -704,7 +704,7 @@ static SENSOR_DEVICE_ATTR(temp1_max_alar
 	get_temp_alarm, NULL, IDX_TEMP1_MAX);
 static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO,
 	get_temp_alarm, NULL, IDX_TEMP1_CRIT);
-static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO | S_IWUSR,
+static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO,
 	get_temp, NULL, IDX_TEMP2_INPUT);
 static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO | S_IWUSR, get_temp,
 	set_temp, IDX_TEMP2_MIN);
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/hwmon/emc2103.c linux-libre-3.15.6-gnu/drivers/hwmon/emc2103.c
--- linux-libre-3.15.5-gnu/drivers/hwmon/emc2103.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/hwmon/emc2103.c	2014-07-17 19:23:31.000000000 -0400
@@ -250,9 +250,7 @@ static ssize_t set_temp_min(struct devic
 	if (result < 0)
 		return result;
 
-	val = DIV_ROUND_CLOSEST(val, 1000);
-	if ((val < -63) || (val > 127))
-		return -EINVAL;
+	val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), -63, 127);
 
 	mutex_lock(&data->update_lock);
 	data->temp_min[nr] = val;
@@ -274,9 +272,7 @@ static ssize_t set_temp_max(struct devic
 	if (result < 0)
 		return result;
 
-	val = DIV_ROUND_CLOSEST(val, 1000);
-	if ((val < -63) || (val > 127))
-		return -EINVAL;
+	val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), -63, 127);
 
 	mutex_lock(&data->update_lock);
 	data->temp_max[nr] = val;
@@ -390,15 +386,14 @@ static ssize_t set_fan_target(struct dev
 {
 	struct emc2103_data *data = emc2103_update_device(dev);
 	struct i2c_client *client = to_i2c_client(dev);
-	long rpm_target;
+	unsigned long rpm_target;
 
-	int result = kstrtol(buf, 10, &rpm_target);
+	int result = kstrtoul(buf, 10, &rpm_target);
 	if (result < 0)
 		return result;
 
 	/* Datasheet states 16384 as maximum RPM target (table 3.2) */
-	if ((rpm_target < 0) || (rpm_target > 16384))
-		return -EINVAL;
+	rpm_target = clamp_val(rpm_target, 0, 16384);
 
 	mutex_lock(&data->update_lock);
 
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/iio/adc/ti_am335x_adc.c linux-libre-3.15.6-gnu/drivers/iio/adc/ti_am335x_adc.c
--- linux-libre-3.15.5-gnu/drivers/iio/adc/ti_am335x_adc.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/iio/adc/ti_am335x_adc.c	2014-07-17 19:23:31.000000000 -0400
@@ -374,7 +374,7 @@ static int tiadc_read_raw(struct iio_dev
 			return -EAGAIN;
 		}
 	}
-	map_val = chan->channel + TOTAL_CHANNELS;
+	map_val = adc_dev->channel_step[chan->scan_index];
 
 	/*
 	 * We check the complete FIFO. We programmed just one entry but in case
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/md/dm.c linux-libre-3.15.6-gnu/drivers/md/dm.c
--- linux-libre-3.15.5-gnu/drivers/md/dm.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/md/dm.c	2014-07-17 19:23:31.000000000 -0400
@@ -54,6 +54,8 @@ static void do_deferred_remove(struct wo
 
 static DECLARE_WORK(deferred_remove_work, do_deferred_remove);
 
+static struct workqueue_struct *deferred_remove_workqueue;
+
 /*
  * For bio-based dm.
  * One of these is allocated per bio.
@@ -276,16 +278,24 @@ static int __init local_init(void)
 	if (r)
 		goto out_free_rq_tio_cache;
 
+	deferred_remove_workqueue = alloc_workqueue("kdmremove", WQ_UNBOUND, 1);
+	if (!deferred_remove_workqueue) {
+		r = -ENOMEM;
+		goto out_uevent_exit;
+	}
+
 	_major = major;
 	r = register_blkdev(_major, _name);
 	if (r < 0)
-		goto out_uevent_exit;
+		goto out_free_workqueue;
 
 	if (!_major)
 		_major = r;
 
 	return 0;
 
+out_free_workqueue:
+	destroy_workqueue(deferred_remove_workqueue);
 out_uevent_exit:
 	dm_uevent_exit();
 out_free_rq_tio_cache:
@@ -299,6 +309,7 @@ out_free_io_cache:
 static void local_exit(void)
 {
 	flush_scheduled_work();
+	destroy_workqueue(deferred_remove_workqueue);
 
 	kmem_cache_destroy(_rq_tio_cache);
 	kmem_cache_destroy(_io_cache);
@@ -407,7 +418,7 @@ static void dm_blk_close(struct gendisk
 
 	if (atomic_dec_and_test(&md->open_count) &&
 	    (test_bit(DMF_DEFERRED_REMOVE, &md->flags)))
-		schedule_work(&deferred_remove_work);
+		queue_work(deferred_remove_workqueue, &deferred_remove_work);
 
 	dm_put(md);
 
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/md/dm-io.c linux-libre-3.15.6-gnu/drivers/md/dm-io.c
--- linux-libre-3.15.5-gnu/drivers/md/dm-io.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/md/dm-io.c	2014-07-17 19:23:31.000000000 -0400
@@ -10,6 +10,7 @@
 #include <linux/device-mapper.h>
 
 #include <linux/bio.h>
+#include <linux/completion.h>
 #include <linux/mempool.h>
 #include <linux/module.h>
 #include <linux/sched.h>
@@ -32,7 +33,7 @@ struct dm_io_client {
 struct io {
 	unsigned long error_bits;
 	atomic_t count;
-	struct task_struct *sleeper;
+	struct completion *wait;
 	struct dm_io_client *client;
 	io_notify_fn callback;
 	void *context;
@@ -121,8 +122,8 @@ static void dec_count(struct io *io, uns
 			invalidate_kernel_vmap_range(io->vma_invalidate_address,
 						     io->vma_invalidate_size);
 
-		if (io->sleeper)
-			wake_up_process(io->sleeper);
+		if (io->wait)
+			complete(io->wait);
 
 		else {
 			unsigned long r = io->error_bits;
@@ -387,6 +388,7 @@ static int sync_io(struct dm_io_client *
 	 */
 	volatile char io_[sizeof(struct io) + __alignof__(struct io) - 1];
 	struct io *io = (struct io *)PTR_ALIGN(&io_, __alignof__(struct io));
+	DECLARE_COMPLETION_ONSTACK(wait);
 
 	if (num_regions > 1 && (rw & RW_MASK) != WRITE) {
 		WARN_ON(1);
@@ -395,7 +397,7 @@ static int sync_io(struct dm_io_client *
 
 	io->error_bits = 0;
 	atomic_set(&io->count, 1); /* see dispatch_io() */
-	io->sleeper = current;
+	io->wait = &wait;
 	io->client = client;
 
 	io->vma_invalidate_address = dp->vma_invalidate_address;
@@ -403,15 +405,7 @@ static int sync_io(struct dm_io_client *
 
 	dispatch_io(rw, num_regions, where, dp, io, 1);
 
-	while (1) {
-		set_current_state(TASK_UNINTERRUPTIBLE);
-
-		if (!atomic_read(&io->count))
-			break;
-
-		io_schedule();
-	}
-	set_current_state(TASK_RUNNING);
+	wait_for_completion_io(&wait);
 
 	if (error_bits)
 		*error_bits = io->error_bits;
@@ -434,7 +428,7 @@ static int async_io(struct dm_io_client
 	io = mempool_alloc(client->pool, GFP_NOIO);
 	io->error_bits = 0;
 	atomic_set(&io->count, 1); /* see dispatch_io() */
-	io->sleeper = NULL;
+	io->wait = NULL;
 	io->client = client;
 	io->callback = fn;
 	io->context = context;
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/md/dm-mpath.c linux-libre-3.15.6-gnu/drivers/md/dm-mpath.c
--- linux-libre-3.15.5-gnu/drivers/md/dm-mpath.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/md/dm-mpath.c	2014-07-17 19:23:31.000000000 -0400
@@ -1620,8 +1620,9 @@ static int multipath_busy(struct dm_targ
 
 	spin_lock_irqsave(&m->lock, flags);
 
-	/* pg_init in progress, requeue until done */
-	if (!pg_ready(m)) {
+	/* pg_init in progress or no paths available */
+	if (m->pg_init_in_progress ||
+	    (!m->nr_valid_paths && m->queue_if_no_path)) {
 		busy = 1;
 		goto out;
 	}
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/mtd/nand/omap2.c linux-libre-3.15.6-gnu/drivers/mtd/nand/omap2.c
--- linux-libre-3.15.5-gnu/drivers/mtd/nand/omap2.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/mtd/nand/omap2.c	2014-07-17 19:23:31.000000000 -0400
@@ -1162,7 +1162,7 @@ static int __maybe_unused omap_calculate
 	struct gpmc_nand_regs	*gpmc_regs = &info->reg;
 	u8 *ecc_code;
 	unsigned long nsectors, bch_val1, bch_val2, bch_val3, bch_val4;
-	int i;
+	int i, j;
 
 	nsectors = ((readl(info->reg.gpmc_ecc_config) >> 4) & 0x7) + 1;
 	for (i = 0; i < nsectors; i++) {
@@ -1210,8 +1210,8 @@ static int __maybe_unused omap_calculate
 		case OMAP_ECC_BCH4_CODE_HW_DETECTION_SW:
 			/* Add constant polynomial to remainder, so that
 			 * ECC of blank pages results in 0x0 on reading back */
-			for (i = 0; i < eccbytes; i++)
-				ecc_calc[i] ^= bch4_polynomial[i];
+			for (j = 0; j < eccbytes; j++)
+				ecc_calc[j] ^= bch4_polynomial[j];
 			break;
 		case OMAP_ECC_BCH4_CODE_HW:
 			/* Set  8th ECC byte as 0x0 for ROM compatibility */
@@ -1220,8 +1220,8 @@ static int __maybe_unused omap_calculate
 		case OMAP_ECC_BCH8_CODE_HW_DETECTION_SW:
 			/* Add constant polynomial to remainder, so that
 			 * ECC of blank pages results in 0x0 on reading back */
-			for (i = 0; i < eccbytes; i++)
-				ecc_calc[i] ^= bch8_polynomial[i];
+			for (j = 0; j < eccbytes; j++)
+				ecc_calc[j] ^= bch8_polynomial[j];
 			break;
 		case OMAP_ECC_BCH8_CODE_HW:
 			/* Set 14th ECC byte as 0x0 for ROM compatibility */
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/net/ethernet/intel/i40e/i40e_main.c linux-libre-3.15.6-gnu/drivers/net/ethernet/intel/i40e/i40e_main.c
--- linux-libre-3.15.5-gnu/drivers/net/ethernet/intel/i40e/i40e_main.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/net/ethernet/intel/i40e/i40e_main.c	2014-07-17 19:23:31.000000000 -0400
@@ -4310,7 +4310,7 @@ int i40e_vsi_open(struct i40e_vsi *vsi)
 		goto err_setup_rx;
 
 	if (!vsi->netdev) {
-		err = EINVAL;
+		err = -EINVAL;
 		goto err_setup_rx;
 	}
 	snprintf(int_name, sizeof(int_name) - 1, "%s-%s",
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/pci/pci.c linux-libre-3.15.6-gnu/drivers/pci/pci.c
--- linux-libre-3.15.5-gnu/drivers/pci/pci.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/pci/pci.c	2014-07-17 19:23:31.000000000 -0400
@@ -3109,8 +3109,13 @@ static int pci_af_flr(struct pci_dev *de
 	if (probe)
 		return 0;
 
-	/* Wait for Transaction Pending bit clean */
-	if (pci_wait_for_pending(dev, pos + PCI_AF_STATUS, PCI_AF_STATUS_TP))
+	/*
+	 * Wait for Transaction Pending bit to clear.  A word-aligned test
+	 * is used, so we use the conrol offset rather than status and shift
+	 * the test bit to match.
+	 */
+	if (pci_wait_for_pending(dev, pos + PCI_AF_CTRL,
+				 PCI_AF_STATUS_TP << 8))
 		goto clear;
 
 	dev_err(&dev->dev, "transaction is not cleared; "
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/phy/phy-core.c linux-libre-3.15.6-gnu/drivers/phy/phy-core.c
--- linux-libre-3.15.5-gnu/drivers/phy/phy-core.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/phy/phy-core.c	2014-07-17 19:23:31.000000000 -0400
@@ -614,8 +614,9 @@ struct phy *phy_create(struct device *de
 	return phy;
 
 put_dev:
-	put_device(&phy->dev);
-	ida_remove(&phy_ida, phy->id);
+	put_device(&phy->dev);  /* calls phy_release() which frees resources */
+	return ERR_PTR(ret);
+
 free_phy:
 	kfree(phy);
 	return ERR_PTR(ret);
@@ -799,7 +800,7 @@ static void phy_release(struct device *d
 
 	phy = to_phy(dev);
 	dev_vdbg(dev, "releasing '%s'\n", dev_name(dev));
-	ida_remove(&phy_ida, phy->id);
+	ida_simple_remove(&phy_ida, phy->id);
 	kfree(phy);
 }
 
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/rtc/rtc-puv3.c linux-libre-3.15.6-gnu/drivers/rtc/rtc-puv3.c
--- linux-libre-3.15.5-gnu/drivers/rtc/rtc-puv3.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/rtc/rtc-puv3.c	2014-07-17 19:23:31.000000000 -0400
@@ -71,7 +71,7 @@ static int puv3_rtc_setpie(struct device
 {
 	unsigned int tmp;
 
-	dev_debug(dev, "%s: pie=%d\n", __func__, enabled);
+	dev_dbg(dev, "%s: pie=%d\n", __func__, enabled);
 
 	spin_lock_irq(&puv3_rtc_pie_lock);
 	tmp = readl(RTC_RTSR) & ~RTC_RTSR_HZE;
@@ -140,7 +140,7 @@ static int puv3_rtc_setalarm(struct devi
 	rtc_tm_to_time(tm, &rtcalarm_count);
 	writel(rtcalarm_count, RTC_RTAR);
 
-	puv3_rtc_setaie(&dev->dev, alrm->enabled);
+	puv3_rtc_setaie(dev, alrm->enabled);
 
 	if (alrm->enabled)
 		enable_irq_wake(puv3_rtc_alarmno);
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/thermal/thermal_hwmon.c linux-libre-3.15.6-gnu/drivers/thermal/thermal_hwmon.c
--- linux-libre-3.15.5-gnu/drivers/thermal/thermal_hwmon.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/thermal/thermal_hwmon.c	2014-07-17 19:23:31.000000000 -0400
@@ -140,6 +140,12 @@ thermal_hwmon_lookup_temp(const struct t
 	return NULL;
 }
 
+static bool thermal_zone_crit_temp_valid(struct thermal_zone_device *tz)
+{
+	unsigned long temp;
+	return tz->ops->get_crit_temp && !tz->ops->get_crit_temp(tz, &temp);
+}
+
 int thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
 {
 	struct thermal_hwmon_device *hwmon;
@@ -189,21 +195,18 @@ int thermal_add_hwmon_sysfs(struct therm
 	if (result)
 		goto free_temp_mem;
 
-	if (tz->ops->get_crit_temp) {
-		unsigned long temperature;
-		if (!tz->ops->get_crit_temp(tz, &temperature)) {
-			snprintf(temp->temp_crit.name,
-				 sizeof(temp->temp_crit.name),
+	if (thermal_zone_crit_temp_valid(tz)) {
+		snprintf(temp->temp_crit.name,
+				sizeof(temp->temp_crit.name),
 				"temp%d_crit", hwmon->count);
-			temp->temp_crit.attr.attr.name = temp->temp_crit.name;
-			temp->temp_crit.attr.attr.mode = 0444;
-			temp->temp_crit.attr.show = temp_crit_show;
-			sysfs_attr_init(&temp->temp_crit.attr.attr);
-			result = device_create_file(hwmon->device,
-						    &temp->temp_crit.attr);
-			if (result)
-				goto unregister_input;
-		}
+		temp->temp_crit.attr.attr.name = temp->temp_crit.name;
+		temp->temp_crit.attr.attr.mode = 0444;
+		temp->temp_crit.attr.show = temp_crit_show;
+		sysfs_attr_init(&temp->temp_crit.attr.attr);
+		result = device_create_file(hwmon->device,
+					    &temp->temp_crit.attr);
+		if (result)
+			goto unregister_input;
 	}
 
 	mutex_lock(&thermal_hwmon_list_lock);
@@ -250,7 +253,7 @@ void thermal_remove_hwmon_sysfs(struct t
 	}
 
 	device_remove_file(hwmon->device, &temp->temp_input.attr);
-	if (tz->ops->get_crit_temp)
+	if (thermal_zone_crit_temp_valid(tz))
 		device_remove_file(hwmon->device, &temp->temp_crit.attr);
 
 	mutex_lock(&thermal_hwmon_list_lock);
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/tty/serial/imx.c linux-libre-3.15.6-gnu/drivers/tty/serial/imx.c
--- linux-libre-3.15.5-gnu/drivers/tty/serial/imx.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/tty/serial/imx.c	2014-07-17 19:23:31.000000000 -0400
@@ -563,6 +563,9 @@ static void imx_start_tx(struct uart_por
 	struct imx_port *sport = (struct imx_port *)port;
 	unsigned long temp;
 
+	if (uart_circ_empty(&port->state->xmit))
+		return;
+
 	if (USE_IRDA(sport)) {
 		/* half duplex in IrDA mode; have to disable receive mode */
 		temp = readl(sport->port.membase + UCR4);
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/tty/serial/ip22zilog.c linux-libre-3.15.6-gnu/drivers/tty/serial/ip22zilog.c
--- linux-libre-3.15.5-gnu/drivers/tty/serial/ip22zilog.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/tty/serial/ip22zilog.c	2014-07-17 19:23:31.000000000 -0400
@@ -603,6 +603,8 @@ static void ip22zilog_start_tx(struct ua
 	} else {
 		struct circ_buf *xmit = &port->state->xmit;
 
+		if (uart_circ_empty(xmit))
+			return;
 		writeb(xmit->buf[xmit->tail], &channel->data);
 		ZSDELAY();
 		ZS_WSYNC(channel);
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/tty/serial/m32r_sio.c linux-libre-3.15.6-gnu/drivers/tty/serial/m32r_sio.c
--- linux-libre-3.15.5-gnu/drivers/tty/serial/m32r_sio.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/tty/serial/m32r_sio.c	2014-07-17 19:23:31.000000000 -0400
@@ -266,9 +266,11 @@ static void m32r_sio_start_tx(struct uar
 	if (!(up->ier & UART_IER_THRI)) {
 		up->ier |= UART_IER_THRI;
 		serial_out(up, UART_IER, up->ier);
-		serial_out(up, UART_TX, xmit->buf[xmit->tail]);
-		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-		up->port.icount.tx++;
+		if (!uart_circ_empty(xmit)) {
+			serial_out(up, UART_TX, xmit->buf[xmit->tail]);
+			xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
+			up->port.icount.tx++;
+		}
 	}
 	while((serial_in(up, UART_LSR) & UART_EMPTY) != UART_EMPTY);
 #else
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/tty/serial/pmac_zilog.c linux-libre-3.15.6-gnu/drivers/tty/serial/pmac_zilog.c
--- linux-libre-3.15.5-gnu/drivers/tty/serial/pmac_zilog.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/tty/serial/pmac_zilog.c	2014-07-17 19:23:31.000000000 -0400
@@ -653,6 +653,8 @@ static void pmz_start_tx(struct uart_por
 	} else {
 		struct circ_buf *xmit = &port->state->xmit;
 
+		if (uart_circ_empty(xmit))
+			goto out;
 		write_zsdata(uap, xmit->buf[xmit->tail]);
 		zssync(uap);
 		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
@@ -661,6 +663,7 @@ static void pmz_start_tx(struct uart_por
 		if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
 			uart_write_wakeup(&uap->port);
 	}
+ out:
 	pmz_debug("pmz: start_tx() done.\n");
 }
 
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/tty/serial/sunsab.c linux-libre-3.15.6-gnu/drivers/tty/serial/sunsab.c
--- linux-libre-3.15.5-gnu/drivers/tty/serial/sunsab.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/tty/serial/sunsab.c	2014-07-17 19:23:31.000000000 -0400
@@ -427,6 +427,9 @@ static void sunsab_start_tx(struct uart_
 	struct circ_buf *xmit = &up->port.state->xmit;
 	int i;
 
+	if (uart_circ_empty(xmit))
+		return;
+
 	up->interrupt_mask1 &= ~(SAB82532_IMR1_ALLS|SAB82532_IMR1_XPR);
 	writeb(up->interrupt_mask1, &up->regs->w.imr1);
 	
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/tty/serial/sunzilog.c linux-libre-3.15.6-gnu/drivers/tty/serial/sunzilog.c
--- linux-libre-3.15.5-gnu/drivers/tty/serial/sunzilog.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/tty/serial/sunzilog.c	2014-07-17 19:23:31.000000000 -0400
@@ -703,6 +703,8 @@ static void sunzilog_start_tx(struct uar
 	} else {
 		struct circ_buf *xmit = &port->state->xmit;
 
+		if (uart_circ_empty(xmit))
+			return;
 		writeb(xmit->buf[xmit->tail], &channel->data);
 		ZSDELAY();
 		ZS_WSYNC(channel);
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/usb/serial/cp210x.c linux-libre-3.15.6-gnu/drivers/usb/serial/cp210x.c
--- linux-libre-3.15.5-gnu/drivers/usb/serial/cp210x.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/usb/serial/cp210x.c	2014-07-17 19:23:31.000000000 -0400
@@ -153,6 +153,7 @@ static const struct usb_device_id id_tab
 	{ USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
 	{ USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
 	{ USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
+	{ USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */
 	{ USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
 	{ USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
 	{ USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/usb/serial/ftdi_sio.c linux-libre-3.15.6-gnu/drivers/usb/serial/ftdi_sio.c
--- linux-libre-3.15.5-gnu/drivers/usb/serial/ftdi_sio.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/usb/serial/ftdi_sio.c	2014-07-17 19:23:31.000000000 -0400
@@ -720,7 +720,8 @@ static const struct usb_device_id id_tab
 	{ USB_DEVICE(FTDI_VID, FTDI_ACG_HFDUAL_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_YEI_SERVOCENTER31_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_THORLABS_PID) },
-	{ USB_DEVICE(TESTO_VID, TESTO_USB_INTERFACE_PID) },
+	{ USB_DEVICE(TESTO_VID, TESTO_1_PID) },
+	{ USB_DEVICE(TESTO_VID, TESTO_3_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_GAMMA_SCOUT_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13M_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13S_PID) },
@@ -944,6 +945,8 @@ static const struct usb_device_id id_tab
 	{ USB_DEVICE(BRAINBOXES_VID, BRAINBOXES_US_842_2_PID) },
 	{ USB_DEVICE(BRAINBOXES_VID, BRAINBOXES_US_842_3_PID) },
 	{ USB_DEVICE(BRAINBOXES_VID, BRAINBOXES_US_842_4_PID) },
+	/* Infineon Devices */
+	{ USB_DEVICE_INTERFACE_NUMBER(INFINEON_VID, INFINEON_TRIBOARD_PID, 1) },
 	{ }					/* Terminating entry */
 };
 
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/usb/serial/ftdi_sio_ids.h linux-libre-3.15.6-gnu/drivers/usb/serial/ftdi_sio_ids.h
--- linux-libre-3.15.5-gnu/drivers/usb/serial/ftdi_sio_ids.h	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/usb/serial/ftdi_sio_ids.h	2014-07-17 19:23:31.000000000 -0400
@@ -584,6 +584,12 @@
 #define RATOC_PRODUCT_ID_USB60F	0xb020
 
 /*
+ * Infineon Technologies
+ */
+#define INFINEON_VID		0x058b
+#define INFINEON_TRIBOARD_PID	0x0028 /* DAS JTAG TriBoard TC1798 V1.0 */
+
+/*
  * Acton Research Corp.
  */
 #define ACTON_VID		0x0647	/* Vendor ID */
@@ -798,7 +804,8 @@
  * Submitted by Colin Leroy
  */
 #define TESTO_VID			0x128D
-#define TESTO_USB_INTERFACE_PID		0x0001
+#define TESTO_1_PID			0x0001
+#define TESTO_3_PID			0x0003
 
 /*
  * Mobility Electronics products.
diff -druNp --no-dereference linux-libre-3.15.5-gnu/drivers/usb/serial/option.c linux-libre-3.15.6-gnu/drivers/usb/serial/option.c
--- linux-libre-3.15.5-gnu/drivers/usb/serial/option.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/drivers/usb/serial/option.c	2014-07-17 19:23:31.000000000 -0400
@@ -1487,6 +1487,8 @@ static const struct usb_device_id option
 		.driver_info = (kernel_ulong_t)&net_intf2_blacklist },
 	{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1426, 0xff, 0xff, 0xff),  /* ZTE MF91 */
 		.driver_info = (kernel_ulong_t)&net_intf2_blacklist },
+	{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1428, 0xff, 0xff, 0xff),  /* Telewell TW-LTE 4G v2 */
+		.driver_info = (kernel_ulong_t)&net_intf2_blacklist },
 	{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1533, 0xff, 0xff, 0xff) },
 	{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1534, 0xff, 0xff, 0xff) },
 	{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1535, 0xff, 0xff, 0xff) },
diff -druNp --no-dereference linux-libre-3.15.5-gnu/fs/ext4/extents_status.c linux-libre-3.15.6-gnu/fs/ext4/extents_status.c
--- linux-libre-3.15.5-gnu/fs/ext4/extents_status.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/fs/ext4/extents_status.c	2014-07-17 19:23:31.000000000 -0400
@@ -960,10 +960,10 @@ retry:
 			continue;
 		}
 
-		if (ei->i_es_lru_nr == 0 || ei == locked_ei)
+		if (ei->i_es_lru_nr == 0 || ei == locked_ei ||
+		    !write_trylock(&ei->i_es_lock))
 			continue;
 
-		write_lock(&ei->i_es_lock);
 		shrunk = __es_try_to_reclaim_extents(ei, nr_to_scan);
 		if (ei->i_es_lru_nr == 0)
 			list_del_init(&ei->i_es_lru);
diff -druNp --no-dereference linux-libre-3.15.5-gnu/fs/ext4/ialloc.c linux-libre-3.15.6-gnu/fs/ext4/ialloc.c
--- linux-libre-3.15.5-gnu/fs/ext4/ialloc.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/fs/ext4/ialloc.c	2014-07-17 19:23:31.000000000 -0400
@@ -851,6 +851,13 @@ got:
 		goto out;
 	}
 
+	BUFFER_TRACE(group_desc_bh, "get_write_access");
+	err = ext4_journal_get_write_access(handle, group_desc_bh);
+	if (err) {
+		ext4_std_error(sb, err);
+		goto out;
+	}
+
 	/* We may have to initialize the block bitmap if it isn't already */
 	if (ext4_has_group_desc_csum(sb) &&
 	    gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
@@ -887,13 +894,6 @@ got:
 		}
 	}
 
-	BUFFER_TRACE(group_desc_bh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, group_desc_bh);
-	if (err) {
-		ext4_std_error(sb, err);
-		goto out;
-	}
-
 	/* Update the relevant bg descriptor fields */
 	if (ext4_has_group_desc_csum(sb)) {
 		int free;
diff -druNp --no-dereference linux-libre-3.15.5-gnu/fs/ext4/mballoc.c linux-libre-3.15.6-gnu/fs/ext4/mballoc.c
--- linux-libre-3.15.5-gnu/fs/ext4/mballoc.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/fs/ext4/mballoc.c	2014-07-17 19:23:31.000000000 -0400
@@ -751,8 +751,8 @@ void ext4_mb_generate_buddy(struct super
 
 	if (free != grp->bb_free) {
 		ext4_grp_locked_error(sb, group, 0, 0,
-				      "%u clusters in bitmap, %u in gd; "
-				      "block bitmap corrupt.",
+				      "block bitmap and bg descriptor "
+				      "inconsistent: %u vs %u free clusters",
 				      free, grp->bb_free);
 		/*
 		 * If we intend to continue, we consider group descriptor
diff -druNp --no-dereference linux-libre-3.15.5-gnu/fs/ext4/super.c linux-libre-3.15.6-gnu/fs/ext4/super.c
--- linux-libre-3.15.5-gnu/fs/ext4/super.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/fs/ext4/super.c	2014-07-17 19:23:31.000000000 -0400
@@ -1524,8 +1524,6 @@ static int handle_mount_opt(struct super
 			arg = JBD2_DEFAULT_MAX_COMMIT_AGE;
 		sbi->s_commit_interval = HZ * arg;
 	} else if (token == Opt_max_batch_time) {
-		if (arg == 0)
-			arg = EXT4_DEF_MAX_BATCH_TIME;
 		sbi->s_max_batch_time = arg;
 	} else if (token == Opt_min_batch_time) {
 		sbi->s_min_batch_time = arg;
@@ -2798,10 +2796,11 @@ static void print_daily_error_info(unsig
 	es = sbi->s_es;
 
 	if (es->s_error_count)
-		ext4_msg(sb, KERN_NOTICE, "error count: %u",
+		/* fsck newer than v1.41.13 is needed to clean this condition. */
+		ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u",
 			 le32_to_cpu(es->s_error_count));
 	if (es->s_first_error_time) {
-		printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d",
+		printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d",
 		       sb->s_id, le32_to_cpu(es->s_first_error_time),
 		       (int) sizeof(es->s_first_error_func),
 		       es->s_first_error_func,
@@ -2815,7 +2814,7 @@ static void print_daily_error_info(unsig
 		printk("\n");
 	}
 	if (es->s_last_error_time) {
-		printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d",
+		printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d",
 		       sb->s_id, le32_to_cpu(es->s_last_error_time),
 		       (int) sizeof(es->s_last_error_func),
 		       es->s_last_error_func,
@@ -3869,38 +3868,19 @@ static int ext4_fill_super(struct super_
 			goto failed_mount2;
 		}
 	}
-
-	/*
-	 * set up enough so that it can read an inode,
-	 * and create new inode for buddy allocator
-	 */
-	sbi->s_gdb_count = db_count;
-	if (!test_opt(sb, NOLOAD) &&
-	    EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL))
-		sb->s_op = &ext4_sops;
-	else
-		sb->s_op = &ext4_nojournal_sops;
-
-	ext4_ext_init(sb);
-	err = ext4_mb_init(sb);
-	if (err) {
-		ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)",
-			 err);
-		goto failed_mount2;
-	}
-
 	if (!ext4_check_descriptors(sb, &first_not_zeroed)) {
 		ext4_msg(sb, KERN_ERR, "group descriptors corrupted!");
-		goto failed_mount2a;
+		goto failed_mount2;
 	}
 	if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG))
 		if (!ext4_fill_flex_info(sb)) {
 			ext4_msg(sb, KERN_ERR,
 			       "unable to initialize "
 			       "flex_bg meta info!");
-			goto failed_mount2a;
+			goto failed_mount2;
 		}
 
+	sbi->s_gdb_count = db_count;
 	get_random_bytes(&sbi->s_next_generation, sizeof(u32));
 	spin_lock_init(&sbi->s_next_gen_lock);
 
@@ -3935,6 +3915,14 @@ static int ext4_fill_super(struct super_
 	sbi->s_stripe = ext4_get_stripe_size(sbi);
 	sbi->s_extent_max_zeroout_kb = 32;
 
+	/*
+	 * set up enough so that it can read an inode
+	 */
+	if (!test_opt(sb, NOLOAD) &&
+	    EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL))
+		sb->s_op = &ext4_sops;
+	else
+		sb->s_op = &ext4_nojournal_sops;
 	sb->s_export_op = &ext4_export_ops;
 	sb->s_xattr = ext4_xattr_handlers;
 #ifdef CONFIG_QUOTA
@@ -4124,13 +4112,21 @@ no_journal:
 	if (err) {
 		ext4_msg(sb, KERN_ERR, "failed to reserve %llu clusters for "
 			 "reserved pool", ext4_calculate_resv_clusters(sb));
-		goto failed_mount5;
+		goto failed_mount4a;
 	}
 
 	err = ext4_setup_system_zone(sb);
 	if (err) {
 		ext4_msg(sb, KERN_ERR, "failed to initialize system "
 			 "zone (%d)", err);
+		goto failed_mount4a;
+	}
+
+	ext4_ext_init(sb);
+	err = ext4_mb_init(sb);
+	if (err) {
+		ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)",
+			 err);
 		goto failed_mount5;
 	}
 
@@ -4207,8 +4203,11 @@ failed_mount8:
 failed_mount7:
 	ext4_unregister_li_request(sb);
 failed_mount6:
-	ext4_release_system_zone(sb);
+	ext4_mb_release(sb);
 failed_mount5:
+	ext4_ext_release(sb);
+	ext4_release_system_zone(sb);
+failed_mount4a:
 	dput(sb->s_root);
 	sb->s_root = NULL;
 failed_mount4:
@@ -4232,14 +4231,11 @@ failed_mount3:
 	percpu_counter_destroy(&sbi->s_extent_cache_cnt);
 	if (sbi->s_mmp_tsk)
 		kthread_stop(sbi->s_mmp_tsk);
-failed_mount2a:
-	ext4_mb_release(sb);
 failed_mount2:
 	for (i = 0; i < db_count; i++)
 		brelse(sbi->s_group_desc[i]);
 	ext4_kvfree(sbi->s_group_desc);
 failed_mount:
-	ext4_ext_release(sb);
 	if (sbi->s_chksum_driver)
 		crypto_free_shash(sbi->s_chksum_driver);
 	if (sbi->s_proc) {
diff -druNp --no-dereference linux-libre-3.15.5-gnu/fs/f2fs/data.c linux-libre-3.15.6-gnu/fs/f2fs/data.c
--- linux-libre-3.15.5-gnu/fs/f2fs/data.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/fs/f2fs/data.c	2014-07-17 19:23:31.000000000 -0400
@@ -869,7 +869,8 @@ static int f2fs_write_data_pages(struct
 		return 0;
 
 	if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE &&
-			get_dirty_dents(inode) < nr_pages_to_skip(sbi, DATA))
+			get_dirty_dents(inode) < nr_pages_to_skip(sbi, DATA) &&
+			available_free_memory(sbi, DIRTY_DENTS))
 		goto skip_write;
 
 	diff = nr_pages_to_write(sbi, DATA, wbc);
diff -druNp --no-dereference linux-libre-3.15.5-gnu/fs/f2fs/f2fs.h linux-libre-3.15.6-gnu/fs/f2fs/f2fs.h
--- linux-libre-3.15.5-gnu/fs/f2fs/f2fs.h	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/fs/f2fs/f2fs.h	2014-07-17 19:23:31.000000000 -0400
@@ -1140,6 +1140,7 @@ f2fs_hash_t f2fs_dentry_hash(const char
 struct dnode_of_data;
 struct node_info;
 
+bool available_free_memory(struct f2fs_sb_info *, int);
 int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
 bool fsync_mark_done(struct f2fs_sb_info *, nid_t);
 void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
diff -druNp --no-dereference linux-libre-3.15.5-gnu/fs/f2fs/node.c linux-libre-3.15.6-gnu/fs/f2fs/node.c
--- linux-libre-3.15.5-gnu/fs/f2fs/node.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/fs/f2fs/node.c	2014-07-17 19:23:31.000000000 -0400
@@ -26,20 +26,28 @@
 static struct kmem_cache *nat_entry_slab;
 static struct kmem_cache *free_nid_slab;
 
-static inline bool available_free_memory(struct f2fs_nm_info *nm_i, int type)
+bool available_free_memory(struct f2fs_sb_info *sbi, int type)
 {
+	struct f2fs_nm_info *nm_i = NM_I(sbi);
 	struct sysinfo val;
 	unsigned long mem_size = 0;
+	bool res = false;
 
 	si_meminfo(&val);
-	if (type == FREE_NIDS)
-		mem_size = nm_i->fcnt * sizeof(struct free_nid);
-	else if (type == NAT_ENTRIES)
-		mem_size += nm_i->nat_cnt * sizeof(struct nat_entry);
-	mem_size >>= 12;
-
-	/* give 50:50 memory for free nids and nat caches respectively */
-	return (mem_size < ((val.totalram * nm_i->ram_thresh) >> 11));
+	/* give 25%, 25%, 50% memory for each components respectively */
+	if (type == FREE_NIDS) {
+		mem_size = (nm_i->fcnt * sizeof(struct free_nid)) >> 12;
+		res = mem_size < ((val.totalram * nm_i->ram_thresh / 100) >> 2);
+	} else if (type == NAT_ENTRIES) {
+		mem_size = (nm_i->nat_cnt * sizeof(struct nat_entry)) >> 12;
+		res = mem_size < ((val.totalram * nm_i->ram_thresh / 100) >> 2);
+	} else if (type == DIRTY_DENTS) {
+		if (sbi->sb->s_bdi->dirty_exceeded)
+			return false;
+		mem_size = get_pages(sbi, F2FS_DIRTY_DENTS);
+		res = mem_size < ((val.totalram * nm_i->ram_thresh / 100) >> 1);
+	}
+	return res;
 }
 
 static void clear_node_page_dirty(struct page *page)
@@ -243,7 +251,7 @@ int try_to_free_nats(struct f2fs_sb_info
 {
 	struct f2fs_nm_info *nm_i = NM_I(sbi);
 
-	if (available_free_memory(nm_i, NAT_ENTRIES))
+	if (available_free_memory(sbi, NAT_ENTRIES))
 		return 0;
 
 	write_lock(&nm_i->nat_tree_lock);
@@ -1315,13 +1323,14 @@ static void __del_from_free_nid_list(str
 	radix_tree_delete(&nm_i->free_nid_root, i->nid);
 }
 
-static int add_free_nid(struct f2fs_nm_info *nm_i, nid_t nid, bool build)
+static int add_free_nid(struct f2fs_sb_info *sbi, nid_t nid, bool build)
 {
+	struct f2fs_nm_info *nm_i = NM_I(sbi);
 	struct free_nid *i;
 	struct nat_entry *ne;
 	bool allocated = false;
 
-	if (!available_free_memory(nm_i, FREE_NIDS))
+	if (!available_free_memory(sbi, FREE_NIDS))
 		return -1;
 
 	/* 0 nid should not be used */
@@ -1374,9 +1383,10 @@ static void remove_free_nid(struct f2fs_
 		kmem_cache_free(free_nid_slab, i);
 }
 
-static void scan_nat_page(struct f2fs_nm_info *nm_i,
+static void scan_nat_page(struct f2fs_sb_info *sbi,
 			struct page *nat_page, nid_t start_nid)
 {
+	struct f2fs_nm_info *nm_i = NM_I(sbi);
 	struct f2fs_nat_block *nat_blk = page_address(nat_page);
 	block_t blk_addr;
 	int i;
@@ -1391,7 +1401,7 @@ static void scan_nat_page(struct f2fs_nm
 		blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr);
 		f2fs_bug_on(blk_addr == NEW_ADDR);
 		if (blk_addr == NULL_ADDR) {
-			if (add_free_nid(nm_i, start_nid, true) < 0)
+			if (add_free_nid(sbi, start_nid, true) < 0)
 				break;
 		}
 	}
@@ -1415,7 +1425,7 @@ static void build_free_nids(struct f2fs_
 	while (1) {
 		struct page *page = get_current_nat_page(sbi, nid);
 
-		scan_nat_page(nm_i, page, nid);
+		scan_nat_page(sbi, page, nid);
 		f2fs_put_page(page, 1);
 
 		nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK));
@@ -1435,7 +1445,7 @@ static void build_free_nids(struct f2fs_
 		block_t addr = le32_to_cpu(nat_in_journal(sum, i).block_addr);
 		nid = le32_to_cpu(nid_in_journal(sum, i));
 		if (addr == NULL_ADDR)
-			add_free_nid(nm_i, nid, true);
+			add_free_nid(sbi, nid, true);
 		else
 			remove_free_nid(nm_i, nid);
 	}
@@ -1512,7 +1522,7 @@ void alloc_nid_failed(struct f2fs_sb_inf
 	spin_lock(&nm_i->free_nid_list_lock);
 	i = __lookup_free_nid_list(nm_i, nid);
 	f2fs_bug_on(!i || i->state != NID_ALLOC);
-	if (!available_free_memory(nm_i, FREE_NIDS)) {
+	if (!available_free_memory(sbi, FREE_NIDS)) {
 		__del_from_free_nid_list(nm_i, i);
 		need_free = true;
 	} else {
@@ -1843,7 +1853,7 @@ flush_now:
 		}
 
 		if (nat_get_blkaddr(ne) == NULL_ADDR &&
-				add_free_nid(NM_I(sbi), nid, false) <= 0) {
+				add_free_nid(sbi, nid, false) <= 0) {
 			write_lock(&nm_i->nat_tree_lock);
 			__del_from_nat_cache(nm_i, ne);
 			write_unlock(&nm_i->nat_tree_lock);
diff -druNp --no-dereference linux-libre-3.15.5-gnu/fs/f2fs/node.h linux-libre-3.15.6-gnu/fs/f2fs/node.h
--- linux-libre-3.15.5-gnu/fs/f2fs/node.h	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/fs/f2fs/node.h	2014-07-17 19:23:31.000000000 -0400
@@ -75,9 +75,10 @@ static inline void node_info_from_raw_na
 	ni->version = raw_ne->version;
 }
 
-enum nid_type {
+enum mem_type {
 	FREE_NIDS,	/* indicates the free nid list */
-	NAT_ENTRIES	/* indicates the cached nat entry */
+	NAT_ENTRIES,	/* indicates the cached nat entry */
+	DIRTY_DENTS	/* indicates dirty dentry pages */
 };
 
 /*
diff -druNp --no-dereference linux-libre-3.15.5-gnu/fs/jbd2/transaction.c linux-libre-3.15.6-gnu/fs/jbd2/transaction.c
--- linux-libre-3.15.5-gnu/fs/jbd2/transaction.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/fs/jbd2/transaction.c	2014-07-17 19:23:31.000000000 -0400
@@ -1588,9 +1588,12 @@ int jbd2_journal_stop(handle_t *handle)
 	 * to perform a synchronous write.  We do this to detect the
 	 * case where a single process is doing a stream of sync
 	 * writes.  No point in waiting for joiners in that case.
+	 *
+	 * Setting max_batch_time to 0 disables this completely.
 	 */
 	pid = current->pid;
-	if (handle->h_sync && journal->j_last_sync_writer != pid) {
+	if (handle->h_sync && journal->j_last_sync_writer != pid &&
+	    journal->j_max_batch_time) {
 		u64 commit_time, trans_time;
 
 		journal->j_last_sync_writer = pid;
diff -druNp --no-dereference linux-libre-3.15.5-gnu/fs/kernfs/dir.c linux-libre-3.15.6-gnu/fs/kernfs/dir.c
--- linux-libre-3.15.5-gnu/fs/kernfs/dir.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/fs/kernfs/dir.c	2014-07-17 19:23:31.000000000 -0400
@@ -714,6 +714,7 @@ struct kernfs_root *kernfs_create_root(s
 		return ERR_PTR(-ENOMEM);
 
 	ida_init(&root->ino_ida);
+	INIT_LIST_HEAD(&root->supers);
 
 	kn = __kernfs_new_node(root, "", S_IFDIR | S_IRUGO | S_IXUGO,
 			       KERNFS_DIR);
diff -druNp --no-dereference linux-libre-3.15.5-gnu/fs/kernfs/kernfs-internal.h linux-libre-3.15.6-gnu/fs/kernfs/kernfs-internal.h
--- linux-libre-3.15.5-gnu/fs/kernfs/kernfs-internal.h	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/fs/kernfs/kernfs-internal.h	2014-07-17 19:23:31.000000000 -0400
@@ -49,6 +49,8 @@ static inline struct kernfs_root *kernfs
  * mount.c
  */
 struct kernfs_super_info {
+	struct super_block	*sb;
+
 	/*
 	 * The root associated with this super_block.  Each super_block is
 	 * identified by the root and ns it's associated with.
@@ -62,6 +64,9 @@ struct kernfs_super_info {
 	 * an array and compare kernfs_node tag against every entry.
 	 */
 	const void		*ns;
+
+	/* anchored at kernfs_root->supers, protected by kernfs_mutex */
+	struct list_head	node;
 };
 #define kernfs_info(SB) ((struct kernfs_super_info *)(SB->s_fs_info))
 
diff -druNp --no-dereference linux-libre-3.15.5-gnu/fs/kernfs/mount.c linux-libre-3.15.6-gnu/fs/kernfs/mount.c
--- linux-libre-3.15.5-gnu/fs/kernfs/mount.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/fs/kernfs/mount.c	2014-07-17 19:23:31.000000000 -0400
@@ -68,6 +68,7 @@ static int kernfs_fill_super(struct supe
 	struct inode *inode;
 	struct dentry *root;
 
+	info->sb = sb;
 	sb->s_blocksize = PAGE_CACHE_SIZE;
 	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
 	sb->s_magic = magic;
@@ -167,12 +168,18 @@ struct dentry *kernfs_mount_ns(struct fi
 		*new_sb_created = !sb->s_root;
 
 	if (!sb->s_root) {
+		struct kernfs_super_info *info = kernfs_info(sb);
+
 		error = kernfs_fill_super(sb, magic);
 		if (error) {
 			deactivate_locked_super(sb);
 			return ERR_PTR(error);
 		}
 		sb->s_flags |= MS_ACTIVE;
+
+		mutex_lock(&kernfs_mutex);
+		list_add(&info->node, &root->supers);
+		mutex_unlock(&kernfs_mutex);
 	}
 
 	return dget(sb->s_root);
@@ -191,6 +198,10 @@ void kernfs_kill_sb(struct super_block *
 	struct kernfs_super_info *info = kernfs_info(sb);
 	struct kernfs_node *root_kn = sb->s_root->d_fsdata;
 
+	mutex_lock(&kernfs_mutex);
+	list_del(&info->node);
+	mutex_unlock(&kernfs_mutex);
+
 	/*
 	 * Remove the superblock from fs_supers/s_instances
 	 * so we can't find it, before freeing kernfs_super_info.
@@ -200,6 +211,36 @@ void kernfs_kill_sb(struct super_block *
 	kernfs_put(root_kn);
 }
 
+/**
+ * kernfs_pin_sb: try to pin the superblock associated with a kernfs_root
+ * @kernfs_root: the kernfs_root in question
+ * @ns: the namespace tag
+ *
+ * Pin the superblock so the superblock won't be destroyed in subsequent
+ * operations.  This can be used to block ->kill_sb() which may be useful
+ * for kernfs users which dynamically manage superblocks.
+ *
+ * Returns NULL if there's no superblock associated to this kernfs_root, or
+ * -EINVAL if the superblock is being freed.
+ */
+struct super_block *kernfs_pin_sb(struct kernfs_root *root, const void *ns)
+{
+	struct kernfs_super_info *info;
+	struct super_block *sb = NULL;
+
+	mutex_lock(&kernfs_mutex);
+	list_for_each_entry(info, &root->supers, node) {
+		if (info->ns == ns) {
+			sb = info->sb;
+			if (!atomic_inc_not_zero(&info->sb->s_active))
+				sb = ERR_PTR(-EINVAL);
+			break;
+		}
+	}
+	mutex_unlock(&kernfs_mutex);
+	return sb;
+}
+
 void __init kernfs_init(void)
 {
 	kernfs_node_cache = kmem_cache_create("kernfs_node_cache",
diff -druNp --no-dereference linux-libre-3.15.5-gnu/include/linux/kernfs.h linux-libre-3.15.6-gnu/include/linux/kernfs.h
--- linux-libre-3.15.5-gnu/include/linux/kernfs.h	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/include/linux/kernfs.h	2014-07-17 19:23:31.000000000 -0400
@@ -161,6 +161,10 @@ struct kernfs_root {
 	/* private fields, do not use outside kernfs proper */
 	struct ida		ino_ida;
 	struct kernfs_syscall_ops *syscall_ops;
+
+	/* list of kernfs_super_info of this root, protected by kernfs_mutex */
+	struct list_head	supers;
+
 	wait_queue_head_t	deactivate_waitq;
 };
 
@@ -300,6 +304,7 @@ struct dentry *kernfs_mount_ns(struct fi
 			       struct kernfs_root *root, unsigned long magic,
 			       bool *new_sb_created, const void *ns);
 void kernfs_kill_sb(struct super_block *sb);
+struct super_block *kernfs_pin_sb(struct kernfs_root *root, const void *ns);
 
 void kernfs_init(void);
 
diff -druNp --no-dereference linux-libre-3.15.5-gnu/include/linux/ring_buffer.h linux-libre-3.15.6-gnu/include/linux/ring_buffer.h
--- linux-libre-3.15.5-gnu/include/linux/ring_buffer.h	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/include/linux/ring_buffer.h	2014-07-17 19:23:31.000000000 -0400
@@ -97,7 +97,7 @@ __ring_buffer_alloc(unsigned long size,
 	__ring_buffer_alloc((size), (flags), &__key);	\
 })
 
-void ring_buffer_wait(struct ring_buffer *buffer, int cpu);
+int ring_buffer_wait(struct ring_buffer *buffer, int cpu);
 int ring_buffer_poll_wait(struct ring_buffer *buffer, int cpu,
 			  struct file *filp, poll_table *poll_table);
 
diff -druNp --no-dereference linux-libre-3.15.5-gnu/kernel/cgroup.c linux-libre-3.15.6-gnu/kernel/cgroup.c
--- linux-libre-3.15.5-gnu/kernel/cgroup.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/kernel/cgroup.c	2014-07-17 19:23:31.000000000 -0400
@@ -1484,10 +1484,13 @@ static struct dentry *cgroup_mount(struc
 			 int flags, const char *unused_dev_name,
 			 void *data)
 {
+	struct super_block *pinned_sb = NULL;
+	struct cgroup_subsys *ss;
 	struct cgroup_root *root;
 	struct cgroup_sb_opts opts;
 	struct dentry *dentry;
 	int ret;
+	int i;
 	bool new_sb;
 
 	/*
@@ -1514,6 +1517,29 @@ retry:
 		goto out_unlock;
 	}
 
+	/*
+	 * Destruction of cgroup root is asynchronous, so subsystems may
+	 * still be dying after the previous unmount.  Let's drain the
+	 * dying subsystems.  We just need to ensure that the ones
+	 * unmounted previously finish dying and don't care about new ones
+	 * starting.  Testing ref liveliness is good enough.
+	 */
+	for_each_subsys(ss, i) {
+		if (!(opts.subsys_mask & (1 << i)) ||
+		    ss->root == &cgrp_dfl_root)
+			continue;
+
+		if (!atomic_inc_not_zero(&ss->root->cgrp.refcnt)) {
+			mutex_unlock(&cgroup_mutex);
+			mutex_unlock(&cgroup_tree_mutex);
+			msleep(10);
+			mutex_lock(&cgroup_tree_mutex);
+			mutex_lock(&cgroup_mutex);
+			goto retry;
+		}
+		cgroup_put(&ss->root->cgrp);
+	}
+
 	for_each_root(root) {
 		bool name_match = false;
 
@@ -1559,10 +1585,25 @@ retry:
 		 * destruction to complete so that the subsystems are free.
 		 * We can use wait_queue for the wait but this path is
 		 * super cold.  Let's just sleep for a bit and retry.
+
+		 * We want to reuse @root whose lifetime is governed by its
+		 * ->cgrp.  Let's check whether @root is alive and keep it
+		 * that way.  As cgroup_kill_sb() can happen anytime, we
+		 * want to block it by pinning the sb so that @root doesn't
+		 * get killed before mount is complete.
+		 *
+		 * With the sb pinned, inc_not_zero can reliably indicate
+		 * whether @root can be reused.  If it's being killed,
+		 * drain it.  We can use wait_queue for the wait but this
+		 * path is super cold.  Let's just sleep a bit and retry.
 		 */
-		if (!atomic_inc_not_zero(&root->cgrp.refcnt)) {
+		pinned_sb = kernfs_pin_sb(root->kf_root, NULL);
+		if (IS_ERR(pinned_sb) ||
+		    !atomic_inc_not_zero(&root->cgrp.refcnt)) {
 			mutex_unlock(&cgroup_mutex);
 			mutex_unlock(&cgroup_tree_mutex);
+			if (!IS_ERR_OR_NULL(pinned_sb))
+				deactivate_super(pinned_sb);
 			msleep(10);
 			mutex_lock(&cgroup_tree_mutex);
 			mutex_lock(&cgroup_mutex);
@@ -1609,6 +1650,16 @@ out_unlock:
 				CGROUP_SUPER_MAGIC, &new_sb);
 	if (IS_ERR(dentry) || !new_sb)
 		cgroup_put(&root->cgrp);
+
+	/*
+	 * If @pinned_sb, we're reusing an existing root and holding an
+	 * extra ref on its sb.  Mount is complete.  Put the extra ref.
+	 */
+	if (pinned_sb) {
+		WARN_ON(new_sb);
+		deactivate_super(pinned_sb);
+	}
+
 	return dentry;
 }
 
diff -druNp --no-dereference linux-libre-3.15.5-gnu/kernel/cpuset.c linux-libre-3.15.6-gnu/kernel/cpuset.c
--- linux-libre-3.15.5-gnu/kernel/cpuset.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/kernel/cpuset.c	2014-07-17 19:23:31.000000000 -0400
@@ -1188,7 +1188,13 @@ done:
 
 int current_cpuset_is_being_rebound(void)
 {
-	return task_cs(current) == cpuset_being_rebound;
+	int ret;
+
+	rcu_read_lock();
+	ret = task_cs(current) == cpuset_being_rebound;
+	rcu_read_unlock();
+
+	return ret;
 }
 
 static int update_relax_domain_level(struct cpuset *cs, s64 val)
diff -druNp --no-dereference linux-libre-3.15.5-gnu/kernel/trace/ring_buffer.c linux-libre-3.15.6-gnu/kernel/trace/ring_buffer.c
--- linux-libre-3.15.5-gnu/kernel/trace/ring_buffer.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/kernel/trace/ring_buffer.c	2014-07-17 19:23:31.000000000 -0400
@@ -543,7 +543,7 @@ static void rb_wake_up_waiters(struct ir
  * as data is added to any of the @buffer's cpu buffers. Otherwise
  * it will wait for data to be added to a specific cpu buffer.
  */
-void ring_buffer_wait(struct ring_buffer *buffer, int cpu)
+int ring_buffer_wait(struct ring_buffer *buffer, int cpu)
 {
 	struct ring_buffer_per_cpu *cpu_buffer;
 	DEFINE_WAIT(wait);
@@ -557,6 +557,8 @@ void ring_buffer_wait(struct ring_buffer
 	if (cpu == RING_BUFFER_ALL_CPUS)
 		work = &buffer->irq_work;
 	else {
+		if (!cpumask_test_cpu(cpu, buffer->cpumask))
+			return -ENODEV;
 		cpu_buffer = buffer->buffers[cpu];
 		work = &cpu_buffer->irq_work;
 	}
@@ -591,6 +593,7 @@ void ring_buffer_wait(struct ring_buffer
 		schedule();
 
 	finish_wait(&work->waiters, &wait);
+	return 0;
 }
 
 /**
diff -druNp --no-dereference linux-libre-3.15.5-gnu/kernel/trace/trace.c linux-libre-3.15.6-gnu/kernel/trace/trace.c
--- linux-libre-3.15.5-gnu/kernel/trace/trace.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/kernel/trace/trace.c	2014-07-17 19:23:31.000000000 -0400
@@ -1103,13 +1103,13 @@ update_max_tr_single(struct trace_array
 }
 #endif /* CONFIG_TRACER_MAX_TRACE */
 
-static void default_wait_pipe(struct trace_iterator *iter)
+static int default_wait_pipe(struct trace_iterator *iter)
 {
 	/* Iterators are static, they should be filled or empty */
 	if (trace_buffer_iter(iter, iter->cpu_file))
-		return;
+		return 0;
 
-	ring_buffer_wait(iter->trace_buffer->buffer, iter->cpu_file);
+	return ring_buffer_wait(iter->trace_buffer->buffer, iter->cpu_file);
 }
 
 #ifdef CONFIG_FTRACE_STARTUP_TEST
@@ -4236,17 +4236,19 @@ tracing_poll_pipe(struct file *filp, pol
  *
  *     Anyway, this is really very primitive wakeup.
  */
-void poll_wait_pipe(struct trace_iterator *iter)
+int poll_wait_pipe(struct trace_iterator *iter)
 {
 	set_current_state(TASK_INTERRUPTIBLE);
 	/* sleep for 100 msecs, and try again. */
 	schedule_timeout(HZ / 10);
+	return 0;
 }
 
 /* Must be called with trace_types_lock mutex held. */
 static int tracing_wait_pipe(struct file *filp)
 {
 	struct trace_iterator *iter = filp->private_data;
+	int ret;
 
 	while (trace_empty(iter)) {
 
@@ -4256,10 +4258,13 @@ static int tracing_wait_pipe(struct file
 
 		mutex_unlock(&iter->mutex);
 
-		iter->trace->wait_pipe(iter);
+		ret = iter->trace->wait_pipe(iter);
 
 		mutex_lock(&iter->mutex);
 
+		if (ret)
+			return ret;
+
 		if (signal_pending(current))
 			return -EINTR;
 
@@ -5196,8 +5201,12 @@ tracing_buffers_read(struct file *filp,
 				goto out_unlock;
 			}
 			mutex_unlock(&trace_types_lock);
-			iter->trace->wait_pipe(iter);
+			ret = iter->trace->wait_pipe(iter);
 			mutex_lock(&trace_types_lock);
+			if (ret) {
+				size = ret;
+				goto out_unlock;
+			}
 			if (signal_pending(current)) {
 				size = -EINTR;
 				goto out_unlock;
@@ -5407,8 +5416,10 @@ tracing_buffers_splice_read(struct file
 			goto out;
 		}
 		mutex_unlock(&trace_types_lock);
-		iter->trace->wait_pipe(iter);
+		ret = iter->trace->wait_pipe(iter);
 		mutex_lock(&trace_types_lock);
+		if (ret)
+			goto out;
 		if (signal_pending(current)) {
 			ret = -EINTR;
 			goto out;
diff -druNp --no-dereference linux-libre-3.15.5-gnu/kernel/trace/trace.h linux-libre-3.15.6-gnu/kernel/trace/trace.h
--- linux-libre-3.15.5-gnu/kernel/trace/trace.h	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/kernel/trace/trace.h	2014-07-17 19:23:31.000000000 -0400
@@ -342,7 +342,7 @@ struct tracer {
 	void			(*stop)(struct trace_array *tr);
 	void			(*open)(struct trace_iterator *iter);
 	void			(*pipe_open)(struct trace_iterator *iter);
-	void			(*wait_pipe)(struct trace_iterator *iter);
+	int			(*wait_pipe)(struct trace_iterator *iter);
 	void			(*close)(struct trace_iterator *iter);
 	void			(*pipe_close)(struct trace_iterator *iter);
 	ssize_t			(*read)(struct trace_iterator *iter,
@@ -560,7 +560,7 @@ void trace_init_global_iter(struct trace
 
 void tracing_iter_reset(struct trace_iterator *iter, int cpu);
 
-void poll_wait_pipe(struct trace_iterator *iter);
+int poll_wait_pipe(struct trace_iterator *iter);
 
 void tracing_sched_switch_trace(struct trace_array *tr,
 				struct task_struct *prev,
diff -druNp --no-dereference linux-libre-3.15.5-gnu/kernel/workqueue.c linux-libre-3.15.6-gnu/kernel/workqueue.c
--- linux-libre-3.15.5-gnu/kernel/workqueue.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/kernel/workqueue.c	2014-07-17 19:23:31.000000000 -0400
@@ -3422,6 +3422,7 @@ int workqueue_sysfs_register(struct work
 		}
 	}
 
+	dev_set_uevent_suppress(&wq_dev->dev, false);
 	kobject_uevent(&wq_dev->dev.kobj, KOBJ_ADD);
 	return 0;
 }
@@ -5033,7 +5034,7 @@ static void __init wq_numa_init(void)
 	BUG_ON(!tbl);
 
 	for_each_node(node)
-		BUG_ON(!alloc_cpumask_var_node(&tbl[node], GFP_KERNEL,
+		BUG_ON(!zalloc_cpumask_var_node(&tbl[node], GFP_KERNEL,
 				node_online(node) ? node : NUMA_NO_NODE));
 
 	for_each_possible_cpu(cpu) {
diff -druNp --no-dereference linux-libre-3.15.5-gnu/Makefile linux-libre-3.15.6-gnu/Makefile
--- linux-libre-3.15.5-gnu/Makefile	2014-07-09 17:20:06.000000000 -0400
+++ linux-libre-3.15.6-gnu/Makefile	2014-07-18 02:24:07.000000000 -0400
@@ -1,6 +1,6 @@
 VERSION = 3
 PATCHLEVEL = 15
-SUBLEVEL = 5
+SUBLEVEL = 6
 EXTRAVERSION =-gnu
 NAME = Shuffling Zombie Juror
 
diff -druNp --no-dereference linux-libre-3.15.5-gnu/mm/mempolicy.c linux-libre-3.15.6-gnu/mm/mempolicy.c
--- linux-libre-3.15.5-gnu/mm/mempolicy.c	2014-07-09 14:21:40.000000000 -0400
+++ linux-libre-3.15.6-gnu/mm/mempolicy.c	2014-07-17 19:23:31.000000000 -0400
@@ -2136,7 +2136,6 @@ struct mempolicy *__mpol_dup(struct memp
 	} else
 		*new = *old;
 
-	rcu_read_lock();
 	if (current_cpuset_is_being_rebound()) {
 		nodemask_t mems = cpuset_mems_allowed(current);
 		if (new->flags & MPOL_F_REBINDING)
@@ -2144,7 +2143,6 @@ struct mempolicy *__mpol_dup(struct memp
 		else
 			mpol_rebind_policy(new, &mems, MPOL_REBIND_ONCE);
 	}
-	rcu_read_unlock();
 	atomic_set(&new->refcnt, 1);
 	return new;
 }
