diff --git linux-libre-4.19.155-gnu/Makefile linux-libre-4.19.156-gnu/Makefile
index 09269315858a..bc5f599a8767 100644
--- linux-libre-4.19.155-gnu/Makefile
+++ linux-libre-4.19.156-gnu/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 VERSION = 4
 PATCHLEVEL = 19
-SUBLEVEL = 155
+SUBLEVEL = 156
 EXTRAVERSION = -gnu
 NAME = "People's Front"
 
diff --git linux-libre-4.19.155-gnu/arch/arc/kernel/entry.S linux-libre-4.19.156-gnu/arch/arc/kernel/entry.S
index 705a68208423..85d9ea4a0acc 100644
--- linux-libre-4.19.155-gnu/arch/arc/kernel/entry.S
+++ linux-libre-4.19.156-gnu/arch/arc/kernel/entry.S
@@ -156,6 +156,7 @@ END(EV_Extension)
 tracesys:
 	; save EFA in case tracer wants the PC of traced task
 	; using ERET won't work since next-PC has already committed
+	lr  r12, [efa]
 	GET_CURR_TASK_FIELD_PTR   TASK_THREAD, r11
 	st  r12, [r11, THREAD_FAULT_ADDR]	; thread.fault_address
 
@@ -198,9 +199,15 @@ tracesys_exit:
 ; Breakpoint TRAP
 ; ---------------------------------------------
 trap_with_param:
-	mov r0, r12	; EFA in case ptracer/gdb wants stop_pc
+
+	; stop_pc info by gdb needs this info
+	lr  r0, [efa]
 	mov r1, sp
 
+	; Now that we have read EFA, it is safe to do "fake" rtie
+	;   and get out of CPU exception mode
+	FAKE_RET_FROM_EXCPN
+
 	; Save callee regs in case gdb wants to have a look
 	; SP will grow up by size of CALLEE Reg-File
 	; NOTE: clobbers r12
@@ -227,10 +234,6 @@ ENTRY(EV_Trap)
 
 	EXCEPTION_PROLOGUE
 
-	lr  r12, [efa]
-
-	FAKE_RET_FROM_EXCPN
-
 	;============ TRAP 1   :breakpoints
 	; Check ECR for trap with arg (PROLOGUE ensures r9 has ECR)
 	bmsk.f 0, r9, 7
@@ -238,6 +241,9 @@ ENTRY(EV_Trap)
 
 	;============ TRAP  (no param): syscall top level
 
+	; First return from Exception to pure K mode (Exception/IRQs renabled)
+	FAKE_RET_FROM_EXCPN
+
 	; If syscall tracing ongoing, invoke pre-post-hooks
 	GET_CURR_THR_INFO_FLAGS   r10
 	btst r10, TIF_SYSCALL_TRACE
diff --git linux-libre-4.19.155-gnu/arch/arc/kernel/stacktrace.c linux-libre-4.19.156-gnu/arch/arc/kernel/stacktrace.c
index bf40e06f3fb8..0fed32b95923 100644
--- linux-libre-4.19.155-gnu/arch/arc/kernel/stacktrace.c
+++ linux-libre-4.19.156-gnu/arch/arc/kernel/stacktrace.c
@@ -115,7 +115,7 @@ arc_unwind_core(struct task_struct *tsk, struct pt_regs *regs,
 		int (*consumer_fn) (unsigned int, void *), void *arg)
 {
 #ifdef CONFIG_ARC_DW2_UNWIND
-	int ret = 0;
+	int ret = 0, cnt = 0;
 	unsigned int address;
 	struct unwind_frame_info frame_info;
 
@@ -135,6 +135,11 @@ arc_unwind_core(struct task_struct *tsk, struct pt_regs *regs,
 			break;
 
 		frame_info.regs.r63 = frame_info.regs.r31;
+
+		if (cnt++ > 128) {
+			printk("unwinder looping too long, aborting !\n");
+			return 0;
+		}
 	}
 
 	return address;		/* return the last address it saw */
diff --git linux-libre-4.19.155-gnu/arch/arm/boot/dts/sun4i-a10.dtsi linux-libre-4.19.156-gnu/arch/arm/boot/dts/sun4i-a10.dtsi
index 5d46bb0139fa..707ad5074878 100644
--- linux-libre-4.19.155-gnu/arch/arm/boot/dts/sun4i-a10.dtsi
+++ linux-libre-4.19.156-gnu/arch/arm/boot/dts/sun4i-a10.dtsi
@@ -143,7 +143,7 @@
 			trips {
 				cpu_alert0: cpu-alert0 {
 					/* milliCelsius */
-					temperature = <850000>;
+					temperature = <85000>;
 					hysteresis = <2000>;
 					type = "passive";
 				};
diff --git linux-libre-4.19.155-gnu/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts linux-libre-4.19.156-gnu/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts
index 6cbdd66921aa..1a3e6e3b04eb 100644
--- linux-libre-4.19.155-gnu/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts
+++ linux-libre-4.19.156-gnu/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts
@@ -21,6 +21,10 @@
 
 	aliases {
 		ethernet0 = &eth0;
+		/* for dsa slave device */
+		ethernet1 = &switch0port1;
+		ethernet2 = &switch0port2;
+		ethernet3 = &switch0port3;
 		serial0 = &uart0;
 		serial1 = &uart1;
 	};
@@ -136,25 +140,25 @@
 			#address-cells = <1>;
 			#size-cells = <0>;
 
-			port@0 {
+			switch0port0: port@0 {
 				reg = <0>;
 				label = "cpu";
 				ethernet = <&eth0>;
 			};
 
-			port@1 {
+			switch0port1: port@1 {
 				reg = <1>;
 				label = "wan";
 				phy-handle = <&switch0phy0>;
 			};
 
-			port@2 {
+			switch0port2: port@2 {
 				reg = <2>;
 				label = "lan0";
 				phy-handle = <&switch0phy1>;
 			};
 
-			port@3 {
+			switch0port3: port@3 {
 				reg = <3>;
 				label = "lan1";
 				phy-handle = <&switch0phy2>;
diff --git linux-libre-4.19.155-gnu/arch/x86/kernel/kexec-bzimage64.c linux-libre-4.19.156-gnu/arch/x86/kernel/kexec-bzimage64.c
index 9490a2845f14..273687986a26 100644
--- linux-libre-4.19.155-gnu/arch/x86/kernel/kexec-bzimage64.c
+++ linux-libre-4.19.156-gnu/arch/x86/kernel/kexec-bzimage64.c
@@ -211,8 +211,7 @@ setup_boot_parameters(struct kimage *image, struct boot_params *params,
 	params->hdr.hardware_subarch = boot_params.hdr.hardware_subarch;
 
 	/* Copying screen_info will do? */
-	memcpy(&params->screen_info, &boot_params.screen_info,
-				sizeof(struct screen_info));
+	memcpy(&params->screen_info, &screen_info, sizeof(struct screen_info));
 
 	/* Fill in memsize later */
 	params->screen_info.ext_mem_k = 0;
diff --git linux-libre-4.19.155-gnu/block/blk-cgroup.c linux-libre-4.19.156-gnu/block/blk-cgroup.c
index a06547fe6f6b..85bd46e0a745 100644
--- linux-libre-4.19.155-gnu/block/blk-cgroup.c
+++ linux-libre-4.19.156-gnu/block/blk-cgroup.c
@@ -876,13 +876,20 @@ int blkg_conf_prep(struct blkcg *blkcg, const struct blkcg_policy *pol,
 			goto fail;
 		}
 
+		if (radix_tree_preload(GFP_KERNEL)) {
+			blkg_free(new_blkg);
+			ret = -ENOMEM;
+			goto fail;
+		}
+
 		rcu_read_lock();
 		spin_lock_irq(q->queue_lock);
 
 		blkg = blkg_lookup_check(pos, pol, q);
 		if (IS_ERR(blkg)) {
 			ret = PTR_ERR(blkg);
-			goto fail_unlock;
+			blkg_free(new_blkg);
+			goto fail_preloaded;
 		}
 
 		if (blkg) {
@@ -891,10 +898,12 @@ int blkg_conf_prep(struct blkcg *blkcg, const struct blkcg_policy *pol,
 			blkg = blkg_create(pos, q, new_blkg);
 			if (unlikely(IS_ERR(blkg))) {
 				ret = PTR_ERR(blkg);
-				goto fail_unlock;
+				goto fail_preloaded;
 			}
 		}
 
+		radix_tree_preload_end();
+
 		if (pos == blkcg)
 			goto success;
 	}
@@ -904,6 +913,8 @@ success:
 	ctx->body = body;
 	return 0;
 
+fail_preloaded:
+	radix_tree_preload_end();
 fail_unlock:
 	spin_unlock_irq(q->queue_lock);
 	rcu_read_unlock();
diff --git linux-libre-4.19.155-gnu/drivers/acpi/nfit/core.c linux-libre-4.19.156-gnu/drivers/acpi/nfit/core.c
index dd4c7289610e..cb88f3b43a94 100644
--- linux-libre-4.19.155-gnu/drivers/acpi/nfit/core.c
+++ linux-libre-4.19.156-gnu/drivers/acpi/nfit/core.c
@@ -1535,7 +1535,7 @@ static ssize_t format1_show(struct device *dev,
 					le16_to_cpu(nfit_dcr->dcr->code));
 			break;
 		}
-		if (rc != ENXIO)
+		if (rc != -ENXIO)
 			break;
 	}
 	mutex_unlock(&acpi_desc->init_mutex);
diff --git linux-libre-4.19.155-gnu/drivers/base/dd.c linux-libre-4.19.156-gnu/drivers/base/dd.c
index b3c569412f4e..4ba9231a6be8 100644
--- linux-libre-4.19.155-gnu/drivers/base/dd.c
+++ linux-libre-4.19.156-gnu/drivers/base/dd.c
@@ -931,6 +931,8 @@ static void __device_release_driver(struct device *dev, struct device *parent)
 
 	drv = dev->driver;
 	if (drv) {
+		pm_runtime_get_sync(dev);
+
 		while (device_links_busy(dev)) {
 			device_unlock(dev);
 			if (parent && dev->bus->need_parent_lock)
@@ -946,11 +948,12 @@ static void __device_release_driver(struct device *dev, struct device *parent)
 			 * have released the driver successfully while this one
 			 * was waiting, so check for that.
 			 */
-			if (dev->driver != drv)
+			if (dev->driver != drv) {
+				pm_runtime_put(dev);
 				return;
+			}
 		}
 
-		pm_runtime_get_sync(dev);
 		pm_runtime_clean_up_links(dev);
 
 		driver_sysfs_remove(dev);
diff --git linux-libre-4.19.155-gnu/drivers/crypto/chelsio/chtls/chtls_cm.c linux-libre-4.19.156-gnu/drivers/crypto/chelsio/chtls/chtls_cm.c
index f7334c42ebd9..35116cdb5e38 100644
--- linux-libre-4.19.155-gnu/drivers/crypto/chelsio/chtls/chtls_cm.c
+++ linux-libre-4.19.156-gnu/drivers/crypto/chelsio/chtls/chtls_cm.c
@@ -175,7 +175,7 @@ static struct sk_buff *alloc_ctrl_skb(struct sk_buff *skb, int len)
 {
 	if (likely(skb && !skb_shared(skb) && !skb_cloned(skb))) {
 		__skb_trim(skb, 0);
-		refcount_add(2, &skb->users);
+		refcount_inc(&skb->users);
 	} else {
 		skb = alloc_skb(len, GFP_KERNEL | __GFP_NOFAIL);
 	}
diff --git linux-libre-4.19.155-gnu/drivers/crypto/chelsio/chtls/chtls_hw.c linux-libre-4.19.156-gnu/drivers/crypto/chelsio/chtls/chtls_hw.c
index 64d24823c65a..2294fb06bef3 100644
--- linux-libre-4.19.155-gnu/drivers/crypto/chelsio/chtls/chtls_hw.c
+++ linux-libre-4.19.156-gnu/drivers/crypto/chelsio/chtls/chtls_hw.c
@@ -368,6 +368,9 @@ int chtls_setkey(struct chtls_sock *csk, u32 keylen, u32 optname)
 	if (ret)
 		goto out_notcb;
 
+	if (unlikely(csk_flag(sk, CSK_ABORT_SHUTDOWN)))
+		goto out_notcb;
+
 	set_wr_txq(skb, CPL_PRIORITY_DATA, csk->tlshws.txqid);
 	csk->wr_credits -= DIV_ROUND_UP(len, 16);
 	csk->wr_unacked += DIV_ROUND_UP(len, 16);
diff --git linux-libre-4.19.155-gnu/drivers/gpu/drm/i915/i915_gpu_error.c linux-libre-4.19.156-gnu/drivers/gpu/drm/i915/i915_gpu_error.c
index a262a64f5625..ba24ac698e8b 100644
--- linux-libre-4.19.155-gnu/drivers/gpu/drm/i915/i915_gpu_error.c
+++ linux-libre-4.19.156-gnu/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -268,6 +268,8 @@ static int compress_page(struct compress *c,
 
 		if (zlib_deflate(zstream, Z_NO_FLUSH) != Z_OK)
 			return -EIO;
+
+		cond_resched();
 	} while (zstream->avail_in);
 
 	/* Fallback to uncompressed if we increase size? */
@@ -347,6 +349,7 @@ static int compress_page(struct compress *c,
 	if (!i915_memcpy_from_wc(ptr, src, PAGE_SIZE))
 		memcpy(ptr, src, PAGE_SIZE);
 	dst->pages[dst->page_count++] = ptr;
+	cond_resched();
 
 	return 0;
 }
diff --git linux-libre-4.19.155-gnu/drivers/gpu/drm/vc4/vc4_drv.c linux-libre-4.19.156-gnu/drivers/gpu/drm/vc4/vc4_drv.c
index 04270a14fcaa..868dd1ef3b69 100644
--- linux-libre-4.19.155-gnu/drivers/gpu/drm/vc4/vc4_drv.c
+++ linux-libre-4.19.156-gnu/drivers/gpu/drm/vc4/vc4_drv.c
@@ -312,6 +312,7 @@ unbind_all:
 	component_unbind_all(dev, drm);
 gem_destroy:
 	vc4_gem_destroy(drm);
+	drm_mode_config_cleanup(drm);
 	vc4_bo_cache_destroy(drm);
 dev_put:
 	drm_dev_put(drm);
diff --git linux-libre-4.19.155-gnu/drivers/net/ethernet/cadence/macb_main.c linux-libre-4.19.156-gnu/drivers/net/ethernet/cadence/macb_main.c
index acae87f548a1..0374a1ba1010 100644
--- linux-libre-4.19.155-gnu/drivers/net/ethernet/cadence/macb_main.c
+++ linux-libre-4.19.156-gnu/drivers/net/ethernet/cadence/macb_main.c
@@ -1704,7 +1704,8 @@ static inline int macb_clear_csum(struct sk_buff *skb)
 
 static int macb_pad_and_fcs(struct sk_buff **skb, struct net_device *ndev)
 {
-	bool cloned = skb_cloned(*skb) || skb_header_cloned(*skb);
+	bool cloned = skb_cloned(*skb) || skb_header_cloned(*skb) ||
+		      skb_is_nonlinear(*skb);
 	int padlen = ETH_ZLEN - (*skb)->len;
 	int headroom = skb_headroom(*skb);
 	int tailroom = skb_tailroom(*skb);
diff --git linux-libre-4.19.155-gnu/drivers/net/ethernet/freescale/gianfar.c linux-libre-4.19.156-gnu/drivers/net/ethernet/freescale/gianfar.c
index 8243501c3757..8db0924ec681 100644
--- linux-libre-4.19.155-gnu/drivers/net/ethernet/freescale/gianfar.c
+++ linux-libre-4.19.156-gnu/drivers/net/ethernet/freescale/gianfar.c
@@ -1388,7 +1388,7 @@ static int gfar_probe(struct platform_device *ofdev)
 
 	if (dev->features & NETIF_F_IP_CSUM ||
 	    priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER)
-		dev->needed_headroom = GMAC_FCB_LEN;
+		dev->needed_headroom = GMAC_FCB_LEN + GMAC_TXPAL_LEN;
 
 	/* Initializing some of the rx/tx queue level parameters */
 	for (i = 0; i < priv->num_tx_queues; i++) {
@@ -2370,20 +2370,12 @@ static netdev_tx_t gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		fcb_len = GMAC_FCB_LEN + GMAC_TXPAL_LEN;
 
 	/* make space for additional header when fcb is needed */
-	if (fcb_len && unlikely(skb_headroom(skb) < fcb_len)) {
-		struct sk_buff *skb_new;
-
-		skb_new = skb_realloc_headroom(skb, fcb_len);
-		if (!skb_new) {
+	if (fcb_len) {
+		if (unlikely(skb_cow_head(skb, fcb_len))) {
 			dev->stats.tx_errors++;
 			dev_kfree_skb_any(skb);
 			return NETDEV_TX_OK;
 		}
-
-		if (skb->sk)
-			skb_set_owner_w(skb_new, skb->sk);
-		dev_consume_skb_any(skb);
-		skb = skb_new;
 	}
 
 	/* total number of fragments in the SKB */
diff --git linux-libre-4.19.155-gnu/drivers/net/phy/sfp.c linux-libre-4.19.156-gnu/drivers/net/phy/sfp.c
index 998d08ae7431..47d518e6d5d4 100644
--- linux-libre-4.19.155-gnu/drivers/net/phy/sfp.c
+++ linux-libre-4.19.156-gnu/drivers/net/phy/sfp.c
@@ -1886,7 +1886,8 @@ static int sfp_probe(struct platform_device *pdev)
 			continue;
 
 		irq = gpiod_to_irq(sfp->gpio[i]);
-		if (!irq) {
+		if (irq < 0) {
+			irq = 0;
 			poll = true;
 			continue;
 		}
diff --git linux-libre-4.19.155-gnu/drivers/net/usb/qmi_wwan.c linux-libre-4.19.156-gnu/drivers/net/usb/qmi_wwan.c
index d2612b69257e..6e0b3dc14aa4 100644
--- linux-libre-4.19.155-gnu/drivers/net/usb/qmi_wwan.c
+++ linux-libre-4.19.156-gnu/drivers/net/usb/qmi_wwan.c
@@ -1268,6 +1268,7 @@ static const struct usb_device_id products[] = {
 	{QMI_FIXED_INTF(0x1bc7, 0x1101, 3)},	/* Telit ME910 dual modem */
 	{QMI_FIXED_INTF(0x1bc7, 0x1200, 5)},	/* Telit LE920 */
 	{QMI_QUIRK_SET_DTR(0x1bc7, 0x1201, 2)},	/* Telit LE920, LE920A4 */
+	{QMI_QUIRK_SET_DTR(0x1bc7, 0x1230, 2)},	/* Telit LE910Cx */
 	{QMI_QUIRK_SET_DTR(0x1bc7, 0x1260, 2)},	/* Telit LE910Cx */
 	{QMI_QUIRK_SET_DTR(0x1bc7, 0x1261, 2)},	/* Telit LE910Cx */
 	{QMI_QUIRK_SET_DTR(0x1bc7, 0x1900, 1)},	/* Telit LN940 series */
diff --git linux-libre-4.19.155-gnu/drivers/of/of_reserved_mem.c linux-libre-4.19.156-gnu/drivers/of/of_reserved_mem.c
index 895c83e0c7b6..19f95552da4d 100644
--- linux-libre-4.19.155-gnu/drivers/of/of_reserved_mem.c
+++ linux-libre-4.19.156-gnu/drivers/of/of_reserved_mem.c
@@ -218,6 +218,16 @@ static int __init __rmem_cmp(const void *a, const void *b)
 	if (ra->base > rb->base)
 		return 1;
 
+	/*
+	 * Put the dynamic allocations (address == 0, size == 0) before static
+	 * allocations at address 0x0 so that overlap detection works
+	 * correctly.
+	 */
+	if (ra->size < rb->size)
+		return -1;
+	if (ra->size > rb->size)
+		return 1;
+
 	return 0;
 }
 
@@ -235,8 +245,7 @@ static void __init __rmem_check_for_overlap(void)
 
 		this = &reserved_mem[i];
 		next = &reserved_mem[i + 1];
-		if (!(this->base && next->base))
-			continue;
+
 		if (this->base + this->size > next->base) {
 			phys_addr_t this_end, next_end;
 
diff --git linux-libre-4.19.155-gnu/drivers/scsi/scsi_scan.c linux-libre-4.19.156-gnu/drivers/scsi/scsi_scan.c
index 9a7e3a3bd5ce..009a5b2aa3d0 100644
--- linux-libre-4.19.155-gnu/drivers/scsi/scsi_scan.c
+++ linux-libre-4.19.156-gnu/drivers/scsi/scsi_scan.c
@@ -1722,15 +1722,16 @@ static void scsi_sysfs_add_devices(struct Scsi_Host *shost)
  */
 static struct async_scan_data *scsi_prep_async_scan(struct Scsi_Host *shost)
 {
-	struct async_scan_data *data;
+	struct async_scan_data *data = NULL;
 	unsigned long flags;
 
 	if (strncmp(scsi_scan_type, "sync", 4) == 0)
 		return NULL;
 
+	mutex_lock(&shost->scan_mutex);
 	if (shost->async_scan) {
 		shost_printk(KERN_DEBUG, shost, "%s called twice\n", __func__);
-		return NULL;
+		goto err;
 	}
 
 	data = kmalloc(sizeof(*data), GFP_KERNEL);
@@ -1741,7 +1742,6 @@ static struct async_scan_data *scsi_prep_async_scan(struct Scsi_Host *shost)
 		goto err;
 	init_completion(&data->prev_finished);
 
-	mutex_lock(&shost->scan_mutex);
 	spin_lock_irqsave(shost->host_lock, flags);
 	shost->async_scan = 1;
 	spin_unlock_irqrestore(shost->host_lock, flags);
@@ -1756,6 +1756,7 @@ static struct async_scan_data *scsi_prep_async_scan(struct Scsi_Host *shost)
 	return data;
 
  err:
+	mutex_unlock(&shost->scan_mutex);
 	kfree(data);
 	return NULL;
 }
diff --git linux-libre-4.19.155-gnu/drivers/tty/serial/8250/8250_mtk.c linux-libre-4.19.156-gnu/drivers/tty/serial/8250/8250_mtk.c
index 159169a48deb..cc4f0c5e5ddf 100644
--- linux-libre-4.19.155-gnu/drivers/tty/serial/8250/8250_mtk.c
+++ linux-libre-4.19.156-gnu/drivers/tty/serial/8250/8250_mtk.c
@@ -47,7 +47,7 @@ mtk8250_set_termios(struct uart_port *port, struct ktermios *termios,
 	 */
 	baud = tty_termios_baud_rate(termios);
 
-	serial8250_do_set_termios(port, termios, old);
+	serial8250_do_set_termios(port, termios, NULL);
 
 	tty_termios_encode_baud_rate(termios, baud, baud);
 
diff --git linux-libre-4.19.155-gnu/drivers/tty/serial/serial_txx9.c linux-libre-4.19.156-gnu/drivers/tty/serial/serial_txx9.c
index 1b4008d022bf..2f7ef64536a0 100644
--- linux-libre-4.19.155-gnu/drivers/tty/serial/serial_txx9.c
+++ linux-libre-4.19.156-gnu/drivers/tty/serial/serial_txx9.c
@@ -1284,6 +1284,9 @@ static int __init serial_txx9_init(void)
 
 #ifdef ENABLE_SERIAL_TXX9_PCI
 	ret = pci_register_driver(&serial_txx9_pci_driver);
+	if (ret) {
+		platform_driver_unregister(&serial_txx9_plat_driver);
+	}
 #endif
 	if (ret == 0)
 		goto out;
diff --git linux-libre-4.19.155-gnu/drivers/tty/vt/vt.c linux-libre-4.19.156-gnu/drivers/tty/vt/vt.c
index 758f522f331e..13ea0579f104 100644
--- linux-libre-4.19.155-gnu/drivers/tty/vt/vt.c
+++ linux-libre-4.19.156-gnu/drivers/tty/vt/vt.c
@@ -4574,27 +4574,6 @@ static int con_font_default(struct vc_data *vc, struct console_font_op *op)
 	return rc;
 }
 
-static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
-{
-	int con = op->height;
-	int rc;
-
-
-	console_lock();
-	if (vc->vc_mode != KD_TEXT)
-		rc = -EINVAL;
-	else if (!vc->vc_sw->con_font_copy)
-		rc = -ENOSYS;
-	else if (con < 0 || !vc_cons_allocated(con))
-		rc = -ENOTTY;
-	else if (con == vc->vc_num)	/* nothing to do */
-		rc = 0;
-	else
-		rc = vc->vc_sw->con_font_copy(vc, con);
-	console_unlock();
-	return rc;
-}
-
 int con_font_op(struct vc_data *vc, struct console_font_op *op)
 {
 	switch (op->op) {
@@ -4605,7 +4584,8 @@ int con_font_op(struct vc_data *vc, struct console_font_op *op)
 	case KD_FONT_OP_SET_DEFAULT:
 		return con_font_default(vc, op);
 	case KD_FONT_OP_COPY:
-		return con_font_copy(vc, op);
+		/* was buggy and never really used */
+		return -EINVAL;
 	}
 	return -ENOSYS;
 }
diff --git linux-libre-4.19.155-gnu/drivers/usb/core/quirks.c linux-libre-4.19.156-gnu/drivers/usb/core/quirks.c
index 4ee810531098..5ad14cdd9762 100644
--- linux-libre-4.19.155-gnu/drivers/usb/core/quirks.c
+++ linux-libre-4.19.156-gnu/drivers/usb/core/quirks.c
@@ -378,6 +378,9 @@ static const struct usb_device_id usb_quirk_list[] = {
 	{ USB_DEVICE(0x0926, 0x3333), .driver_info =
 			USB_QUIRK_CONFIG_INTF_STRINGS },
 
+	/* Kingston DataTraveler 3.0 */
+	{ USB_DEVICE(0x0951, 0x1666), .driver_info = USB_QUIRK_NO_LPM },
+
 	/* X-Rite/Gretag-Macbeth Eye-One Pro display colorimeter */
 	{ USB_DEVICE(0x0971, 0x2000), .driver_info = USB_QUIRK_NO_SET_INTF },
 
diff --git linux-libre-4.19.155-gnu/drivers/usb/mtu3/mtu3_gadget.c linux-libre-4.19.156-gnu/drivers/usb/mtu3/mtu3_gadget.c
index bbcd3332471d..3828ed6d38a2 100644
--- linux-libre-4.19.155-gnu/drivers/usb/mtu3/mtu3_gadget.c
+++ linux-libre-4.19.156-gnu/drivers/usb/mtu3/mtu3_gadget.c
@@ -573,6 +573,7 @@ static int mtu3_gadget_stop(struct usb_gadget *g)
 
 	spin_unlock_irqrestore(&mtu->lock, flags);
 
+	synchronize_irq(mtu->irq);
 	return 0;
 }
 
diff --git linux-libre-4.19.155-gnu/drivers/usb/serial/cyberjack.c linux-libre-4.19.156-gnu/drivers/usb/serial/cyberjack.c
index ebd76ab07b72..36dd688b5795 100644
--- linux-libre-4.19.155-gnu/drivers/usb/serial/cyberjack.c
+++ linux-libre-4.19.156-gnu/drivers/usb/serial/cyberjack.c
@@ -357,11 +357,12 @@ static void cyberjack_write_bulk_callback(struct urb *urb)
 	struct device *dev = &port->dev;
 	int status = urb->status;
 	unsigned long flags;
+	bool resubmitted = false;
 
-	set_bit(0, &port->write_urbs_free);
 	if (status) {
 		dev_dbg(dev, "%s - nonzero write bulk status received: %d\n",
 			__func__, status);
+		set_bit(0, &port->write_urbs_free);
 		return;
 	}
 
@@ -394,6 +395,8 @@ static void cyberjack_write_bulk_callback(struct urb *urb)
 			goto exit;
 		}
 
+		resubmitted = true;
+
 		dev_dbg(dev, "%s - priv->wrsent=%d\n", __func__, priv->wrsent);
 		dev_dbg(dev, "%s - priv->wrfilled=%d\n", __func__, priv->wrfilled);
 
@@ -410,6 +413,8 @@ static void cyberjack_write_bulk_callback(struct urb *urb)
 
 exit:
 	spin_unlock_irqrestore(&priv->lock, flags);
+	if (!resubmitted)
+		set_bit(0, &port->write_urbs_free);
 	usb_serial_port_softint(port);
 }
 
diff --git linux-libre-4.19.155-gnu/drivers/usb/serial/option.c linux-libre-4.19.156-gnu/drivers/usb/serial/option.c
index c773db129bf9..f28344f03141 100644
--- linux-libre-4.19.155-gnu/drivers/usb/serial/option.c
+++ linux-libre-4.19.156-gnu/drivers/usb/serial/option.c
@@ -250,6 +250,7 @@ static void option_instat_callback(struct urb *urb);
 #define QUECTEL_PRODUCT_EP06			0x0306
 #define QUECTEL_PRODUCT_EM12			0x0512
 #define QUECTEL_PRODUCT_RM500Q			0x0800
+#define QUECTEL_PRODUCT_EC200T			0x6026
 
 #define CMOTECH_VENDOR_ID			0x16d8
 #define CMOTECH_PRODUCT_6001			0x6001
@@ -1117,6 +1118,7 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_RM500Q, 0xff, 0, 0) },
 	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_RM500Q, 0xff, 0xff, 0x10),
 	  .driver_info = ZLP },
+	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EC200T, 0xff, 0, 0) },
 
 	{ USB_DEVICE(CMOTECH_VENDOR_ID, CMOTECH_PRODUCT_6001) },
 	{ USB_DEVICE(CMOTECH_VENDOR_ID, CMOTECH_PRODUCT_CMU_300) },
@@ -1189,6 +1191,8 @@ static const struct usb_device_id option_ids[] = {
 	  .driver_info = NCTRL(0) | RSVD(1) },
 	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, 0x1054, 0xff),	/* Telit FT980-KS */
 	  .driver_info = NCTRL(2) | RSVD(3) },
+	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, 0x1055, 0xff),	/* Telit FN980 (PCIe) */
+	  .driver_info = NCTRL(0) | RSVD(1) },
 	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_ME910),
 	  .driver_info = NCTRL(0) | RSVD(1) | RSVD(3) },
 	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_ME910_DUAL_MODEM),
@@ -1201,6 +1205,8 @@ static const struct usb_device_id option_ids[] = {
 	  .driver_info = NCTRL(0) },
 	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_LE910),
 	  .driver_info = NCTRL(0) | RSVD(1) | RSVD(2) },
+	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, 0x1203, 0xff),	/* Telit LE910Cx (RNDIS) */
+	  .driver_info = NCTRL(2) | RSVD(3) },
 	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_LE910_USBCFG4),
 	  .driver_info = NCTRL(0) | RSVD(1) | RSVD(2) | RSVD(3) },
 	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_LE920),
@@ -1215,6 +1221,10 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, TELIT_PRODUCT_LE920A4_1213, 0xff) },
 	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_LE920A4_1214),
 	  .driver_info = NCTRL(0) | RSVD(1) | RSVD(2) | RSVD(3) },
+	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, 0x1230, 0xff),	/* Telit LE910Cx (rmnet) */
+	  .driver_info = NCTRL(0) | RSVD(1) | RSVD(2) },
+	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, 0x1231, 0xff),	/* Telit LE910Cx (RNDIS) */
+	  .driver_info = NCTRL(2) | RSVD(3) },
 	{ USB_DEVICE(TELIT_VENDOR_ID, 0x1260),
 	  .driver_info = NCTRL(0) | RSVD(1) | RSVD(2) },
 	{ USB_DEVICE(TELIT_VENDOR_ID, 0x1261),
diff --git linux-libre-4.19.155-gnu/fs/btrfs/ctree.h linux-libre-4.19.156-gnu/fs/btrfs/ctree.h
index 554727d82d43..4d1c12faada8 100644
--- linux-libre-4.19.155-gnu/fs/btrfs/ctree.h
+++ linux-libre-4.19.156-gnu/fs/btrfs/ctree.h
@@ -1459,6 +1459,21 @@ do {                                                                   \
 
 #define BTRFS_INODE_ROOT_ITEM_INIT	(1 << 31)
 
+#define BTRFS_INODE_FLAG_MASK						\
+	(BTRFS_INODE_NODATASUM |					\
+	 BTRFS_INODE_NODATACOW |					\
+	 BTRFS_INODE_READONLY |						\
+	 BTRFS_INODE_NOCOMPRESS |					\
+	 BTRFS_INODE_PREALLOC |						\
+	 BTRFS_INODE_SYNC |						\
+	 BTRFS_INODE_IMMUTABLE |					\
+	 BTRFS_INODE_APPEND |						\
+	 BTRFS_INODE_NODUMP |						\
+	 BTRFS_INODE_NOATIME |						\
+	 BTRFS_INODE_DIRSYNC |						\
+	 BTRFS_INODE_COMPRESS |						\
+	 BTRFS_INODE_ROOT_ITEM_INIT)
+
 struct btrfs_map_token {
 	const struct extent_buffer *eb;
 	char *kaddr;
diff --git linux-libre-4.19.155-gnu/fs/btrfs/extent_io.c linux-libre-4.19.156-gnu/fs/btrfs/extent_io.c
index 82d597b16152..301111922a1a 100644
--- linux-libre-4.19.155-gnu/fs/btrfs/extent_io.c
+++ linux-libre-4.19.156-gnu/fs/btrfs/extent_io.c
@@ -138,7 +138,61 @@ static int add_extent_changeset(struct extent_state *state, unsigned bits,
 	return ret;
 }
 
-static void flush_write_bio(struct extent_page_data *epd);
+static int __must_check submit_one_bio(struct bio *bio, int mirror_num,
+				       unsigned long bio_flags)
+{
+	blk_status_t ret = 0;
+	struct bio_vec *bvec = bio_last_bvec_all(bio);
+	struct page *page = bvec->bv_page;
+	struct extent_io_tree *tree = bio->bi_private;
+	u64 start;
+
+	start = page_offset(page) + bvec->bv_offset;
+
+	bio->bi_private = NULL;
+
+	if (tree->ops)
+		ret = tree->ops->submit_bio_hook(tree->private_data, bio,
+					   mirror_num, bio_flags, start);
+	else
+		btrfsic_submit_bio(bio);
+
+	return blk_status_to_errno(ret);
+}
+
+/* Cleanup unsubmitted bios */
+static void end_write_bio(struct extent_page_data *epd, int ret)
+{
+	if (epd->bio) {
+		epd->bio->bi_status = errno_to_blk_status(ret);
+		bio_endio(epd->bio);
+		epd->bio = NULL;
+	}
+}
+
+/*
+ * Submit bio from extent page data via submit_one_bio
+ *
+ * Return 0 if everything is OK.
+ * Return <0 for error.
+ */
+static int __must_check flush_write_bio(struct extent_page_data *epd)
+{
+	int ret = 0;
+
+	if (epd->bio) {
+		ret = submit_one_bio(epd->bio, 0, 0);
+		/*
+		 * Clean up of epd->bio is handled by its endio function.
+		 * And endio is either triggered by successful bio execution
+		 * or the error handler of submit bio hook.
+		 * So at this point, no matter what happened, we don't need
+		 * to clean up epd->bio.
+		 */
+		epd->bio = NULL;
+	}
+	return ret;
+}
 
 int __init extent_io_init(void)
 {
@@ -2710,28 +2764,6 @@ struct bio *btrfs_bio_clone_partial(struct bio *orig, int offset, int size)
 	return bio;
 }
 
-static int __must_check submit_one_bio(struct bio *bio, int mirror_num,
-				       unsigned long bio_flags)
-{
-	blk_status_t ret = 0;
-	struct bio_vec *bvec = bio_last_bvec_all(bio);
-	struct page *page = bvec->bv_page;
-	struct extent_io_tree *tree = bio->bi_private;
-	u64 start;
-
-	start = page_offset(page) + bvec->bv_offset;
-
-	bio->bi_private = NULL;
-
-	if (tree->ops)
-		ret = tree->ops->submit_bio_hook(tree->private_data, bio,
-					   mirror_num, bio_flags, start);
-	else
-		btrfsic_submit_bio(bio);
-
-	return blk_status_to_errno(ret);
-}
-
 /*
  * @opf:	bio REQ_OP_* and REQ_* flags as one value
  * @tree:	tree so we can call our merge_bio hook
@@ -3439,6 +3471,9 @@ done:
  * records are inserted to lock ranges in the tree, and as dirty areas
  * are found, they are marked writeback.  Then the lock bits are removed
  * and the end_io handler clears the writeback ranges
+ *
+ * Return 0 if everything goes well.
+ * Return <0 for error.
  */
 static int __extent_writepage(struct page *page, struct writeback_control *wbc,
 			      struct extent_page_data *epd)
@@ -3506,6 +3541,7 @@ done:
 		end_extent_writepage(page, ret, start, page_end);
 	}
 	unlock_page(page);
+	ASSERT(ret <= 0);
 	return ret;
 
 done_unlocked:
@@ -3518,18 +3554,34 @@ void wait_on_extent_buffer_writeback(struct extent_buffer *eb)
 		       TASK_UNINTERRUPTIBLE);
 }
 
+static void end_extent_buffer_writeback(struct extent_buffer *eb)
+{
+	clear_bit(EXTENT_BUFFER_WRITEBACK, &eb->bflags);
+	smp_mb__after_atomic();
+	wake_up_bit(&eb->bflags, EXTENT_BUFFER_WRITEBACK);
+}
+
+/*
+ * Lock eb pages and flush the bio if we can't the locks
+ *
+ * Return  0 if nothing went wrong
+ * Return >0 is same as 0, except bio is not submitted
+ * Return <0 if something went wrong, no page is locked
+ */
 static noinline_for_stack int
 lock_extent_buffer_for_io(struct extent_buffer *eb,
 			  struct btrfs_fs_info *fs_info,
 			  struct extent_page_data *epd)
 {
-	int i, num_pages;
+	int i, num_pages, failed_page_nr;
 	int flush = 0;
 	int ret = 0;
 
 	if (!btrfs_try_tree_write_lock(eb)) {
+		ret = flush_write_bio(epd);
+		if (ret < 0)
+			return ret;
 		flush = 1;
-		flush_write_bio(epd);
 		btrfs_tree_lock(eb);
 	}
 
@@ -3538,7 +3590,9 @@ lock_extent_buffer_for_io(struct extent_buffer *eb,
 		if (!epd->sync_io)
 			return 0;
 		if (!flush) {
-			flush_write_bio(epd);
+			ret = flush_write_bio(epd);
+			if (ret < 0)
+				return ret;
 			flush = 1;
 		}
 		while (1) {
@@ -3579,7 +3633,14 @@ lock_extent_buffer_for_io(struct extent_buffer *eb,
 
 		if (!trylock_page(p)) {
 			if (!flush) {
-				flush_write_bio(epd);
+				int err;
+
+				err = flush_write_bio(epd);
+				if (err < 0) {
+					ret = err;
+					failed_page_nr = i;
+					goto err_unlock;
+				}
 				flush = 1;
 			}
 			lock_page(p);
@@ -3587,13 +3648,25 @@ lock_extent_buffer_for_io(struct extent_buffer *eb,
 	}
 
 	return ret;
-}
-
-static void end_extent_buffer_writeback(struct extent_buffer *eb)
-{
-	clear_bit(EXTENT_BUFFER_WRITEBACK, &eb->bflags);
-	smp_mb__after_atomic();
-	wake_up_bit(&eb->bflags, EXTENT_BUFFER_WRITEBACK);
+err_unlock:
+	/* Unlock already locked pages */
+	for (i = 0; i < failed_page_nr; i++)
+		unlock_page(eb->pages[i]);
+	/*
+	 * Clear EXTENT_BUFFER_WRITEBACK and wake up anyone waiting on it.
+	 * Also set back EXTENT_BUFFER_DIRTY so future attempts to this eb can
+	 * be made and undo everything done before.
+	 */
+	btrfs_tree_lock(eb);
+	spin_lock(&eb->refs_lock);
+	set_bit(EXTENT_BUFFER_DIRTY, &eb->bflags);
+	end_extent_buffer_writeback(eb);
+	spin_unlock(&eb->refs_lock);
+	percpu_counter_add_batch(&fs_info->dirty_metadata_bytes, eb->len,
+				 fs_info->dirty_metadata_batch);
+	btrfs_clear_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN);
+	btrfs_tree_unlock(eb);
+	return ret;
 }
 
 static void set_btree_ioerr(struct page *page)
@@ -3869,7 +3942,44 @@ retry:
 		index = 0;
 		goto retry;
 	}
-	flush_write_bio(&epd);
+	ASSERT(ret <= 0);
+	if (ret < 0) {
+		end_write_bio(&epd, ret);
+		return ret;
+	}
+	/*
+	 * If something went wrong, don't allow any metadata write bio to be
+	 * submitted.
+	 *
+	 * This would prevent use-after-free if we had dirty pages not
+	 * cleaned up, which can still happen by fuzzed images.
+	 *
+	 * - Bad extent tree
+	 *   Allowing existing tree block to be allocated for other trees.
+	 *
+	 * - Log tree operations
+	 *   Exiting tree blocks get allocated to log tree, bumps its
+	 *   generation, then get cleaned in tree re-balance.
+	 *   Such tree block will not be written back, since it's clean,
+	 *   thus no WRITTEN flag set.
+	 *   And after log writes back, this tree block is not traced by
+	 *   any dirty extent_io_tree.
+	 *
+	 * - Offending tree block gets re-dirtied from its original owner
+	 *   Since it has bumped generation, no WRITTEN flag, it can be
+	 *   reused without COWing. This tree block will not be traced
+	 *   by btrfs_transaction::dirty_pages.
+	 *
+	 *   Now such dirty tree block will not be cleaned by any dirty
+	 *   extent io tree. Thus we don't want to submit such wild eb
+	 *   if the fs already has error.
+	 */
+	if (!test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) {
+		ret = flush_write_bio(&epd);
+	} else {
+		ret = -EUCLEAN;
+		end_write_bio(&epd, ret);
+	}
 	return ret;
 }
 
@@ -3966,7 +4076,8 @@ retry:
 			 * tmpfs file mapping
 			 */
 			if (!trylock_page(page)) {
-				flush_write_bio(epd);
+				ret = flush_write_bio(epd);
+				BUG_ON(ret < 0);
 				lock_page(page);
 			}
 
@@ -3976,8 +4087,10 @@ retry:
 			}
 
 			if (wbc->sync_mode != WB_SYNC_NONE) {
-				if (PageWriteback(page))
-					flush_write_bio(epd);
+				if (PageWriteback(page)) {
+					ret = flush_write_bio(epd);
+					BUG_ON(ret < 0);
+				}
 				wait_on_page_writeback(page);
 			}
 
@@ -4022,8 +4135,9 @@ retry:
 		 * page in our current bio, and thus deadlock, so flush the
 		 * write bio here.
 		 */
-		flush_write_bio(epd);
-		goto retry;
+		ret = flush_write_bio(epd);
+		if (!ret)
+			goto retry;
 	}
 
 	if (wbc->range_cyclic || (wbc->nr_to_write > 0 && range_whole))
@@ -4033,17 +4147,6 @@ retry:
 	return ret;
 }
 
-static void flush_write_bio(struct extent_page_data *epd)
-{
-	if (epd->bio) {
-		int ret;
-
-		ret = submit_one_bio(epd->bio, 0, 0);
-		BUG_ON(ret < 0); /* -ENOMEM */
-		epd->bio = NULL;
-	}
-}
-
 int extent_write_full_page(struct page *page, struct writeback_control *wbc)
 {
 	int ret;
@@ -4055,8 +4158,14 @@ int extent_write_full_page(struct page *page, struct writeback_control *wbc)
 	};
 
 	ret = __extent_writepage(page, wbc, &epd);
+	ASSERT(ret <= 0);
+	if (ret < 0) {
+		end_write_bio(&epd, ret);
+		return ret;
+	}
 
-	flush_write_bio(&epd);
+	ret = flush_write_bio(&epd);
+	ASSERT(ret <= 0);
 	return ret;
 }
 
@@ -4064,6 +4173,7 @@ int extent_write_locked_range(struct inode *inode, u64 start, u64 end,
 			      int mode)
 {
 	int ret = 0;
+	int flush_ret;
 	struct address_space *mapping = inode->i_mapping;
 	struct extent_io_tree *tree = &BTRFS_I(inode)->io_tree;
 	struct page *page;
@@ -4098,7 +4208,8 @@ int extent_write_locked_range(struct inode *inode, u64 start, u64 end,
 		start += PAGE_SIZE;
 	}
 
-	flush_write_bio(&epd);
+	flush_ret = flush_write_bio(&epd);
+	BUG_ON(flush_ret < 0);
 	return ret;
 }
 
@@ -4106,6 +4217,7 @@ int extent_writepages(struct address_space *mapping,
 		      struct writeback_control *wbc)
 {
 	int ret = 0;
+	int flush_ret;
 	struct extent_page_data epd = {
 		.bio = NULL,
 		.tree = &BTRFS_I(mapping->host)->io_tree,
@@ -4114,7 +4226,8 @@ int extent_writepages(struct address_space *mapping,
 	};
 
 	ret = extent_write_cache_pages(mapping, wbc, &epd);
-	flush_write_bio(&epd);
+	flush_ret = flush_write_bio(&epd);
+	BUG_ON(flush_ret < 0);
 	return ret;
 }
 
diff --git linux-libre-4.19.155-gnu/fs/btrfs/tree-checker.c linux-libre-4.19.156-gnu/fs/btrfs/tree-checker.c
index d98ec885b72a..9023e6b46396 100644
--- linux-libre-4.19.155-gnu/fs/btrfs/tree-checker.c
+++ linux-libre-4.19.156-gnu/fs/btrfs/tree-checker.c
@@ -448,6 +448,320 @@ static int check_block_group_item(struct btrfs_fs_info *fs_info,
 	return 0;
 }
 
+__printf(5, 6)
+__cold
+static void chunk_err(const struct btrfs_fs_info *fs_info,
+		      const struct extent_buffer *leaf,
+		      const struct btrfs_chunk *chunk, u64 logical,
+		      const char *fmt, ...)
+{
+	bool is_sb;
+	struct va_format vaf;
+	va_list args;
+	int i;
+	int slot = -1;
+
+	/* Only superblock eb is able to have such small offset */
+	is_sb = (leaf->start == BTRFS_SUPER_INFO_OFFSET);
+
+	if (!is_sb) {
+		/*
+		 * Get the slot number by iterating through all slots, this
+		 * would provide better readability.
+		 */
+		for (i = 0; i < btrfs_header_nritems(leaf); i++) {
+			if (btrfs_item_ptr_offset(leaf, i) ==
+					(unsigned long)chunk) {
+				slot = i;
+				break;
+			}
+		}
+	}
+	va_start(args, fmt);
+	vaf.fmt = fmt;
+	vaf.va = &args;
+
+	if (is_sb)
+		btrfs_crit(fs_info,
+		"corrupt superblock syschunk array: chunk_start=%llu, %pV",
+			   logical, &vaf);
+	else
+		btrfs_crit(fs_info,
+	"corrupt leaf: root=%llu block=%llu slot=%d chunk_start=%llu, %pV",
+			   BTRFS_CHUNK_TREE_OBJECTID, leaf->start, slot,
+			   logical, &vaf);
+	va_end(args);
+}
+
+/*
+ * The common chunk check which could also work on super block sys chunk array.
+ *
+ * Return -EUCLEAN if anything is corrupted.
+ * Return 0 if everything is OK.
+ */
+int btrfs_check_chunk_valid(struct btrfs_fs_info *fs_info,
+			    struct extent_buffer *leaf,
+			    struct btrfs_chunk *chunk, u64 logical)
+{
+	u64 length;
+	u64 stripe_len;
+	u16 num_stripes;
+	u16 sub_stripes;
+	u64 type;
+	u64 features;
+	bool mixed = false;
+
+	length = btrfs_chunk_length(leaf, chunk);
+	stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
+	num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
+	sub_stripes = btrfs_chunk_sub_stripes(leaf, chunk);
+	type = btrfs_chunk_type(leaf, chunk);
+
+	if (!num_stripes) {
+		chunk_err(fs_info, leaf, chunk, logical,
+			  "invalid chunk num_stripes, have %u", num_stripes);
+		return -EUCLEAN;
+	}
+	if (!IS_ALIGNED(logical, fs_info->sectorsize)) {
+		chunk_err(fs_info, leaf, chunk, logical,
+		"invalid chunk logical, have %llu should aligned to %u",
+			  logical, fs_info->sectorsize);
+		return -EUCLEAN;
+	}
+	if (btrfs_chunk_sector_size(leaf, chunk) != fs_info->sectorsize) {
+		chunk_err(fs_info, leaf, chunk, logical,
+			  "invalid chunk sectorsize, have %u expect %u",
+			  btrfs_chunk_sector_size(leaf, chunk),
+			  fs_info->sectorsize);
+		return -EUCLEAN;
+	}
+	if (!length || !IS_ALIGNED(length, fs_info->sectorsize)) {
+		chunk_err(fs_info, leaf, chunk, logical,
+			  "invalid chunk length, have %llu", length);
+		return -EUCLEAN;
+	}
+	if (!is_power_of_2(stripe_len) || stripe_len != BTRFS_STRIPE_LEN) {
+		chunk_err(fs_info, leaf, chunk, logical,
+			  "invalid chunk stripe length: %llu",
+			  stripe_len);
+		return -EUCLEAN;
+	}
+	if (~(BTRFS_BLOCK_GROUP_TYPE_MASK | BTRFS_BLOCK_GROUP_PROFILE_MASK) &
+	    type) {
+		chunk_err(fs_info, leaf, chunk, logical,
+			  "unrecognized chunk type: 0x%llx",
+			  ~(BTRFS_BLOCK_GROUP_TYPE_MASK |
+			    BTRFS_BLOCK_GROUP_PROFILE_MASK) &
+			  btrfs_chunk_type(leaf, chunk));
+		return -EUCLEAN;
+	}
+
+	if (!is_power_of_2(type & BTRFS_BLOCK_GROUP_PROFILE_MASK) &&
+	    (type & BTRFS_BLOCK_GROUP_PROFILE_MASK) != 0) {
+		chunk_err(fs_info, leaf, chunk, logical,
+		"invalid chunk profile flag: 0x%llx, expect 0 or 1 bit set",
+			  type & BTRFS_BLOCK_GROUP_PROFILE_MASK);
+		return -EUCLEAN;
+	}
+	if ((type & BTRFS_BLOCK_GROUP_TYPE_MASK) == 0) {
+		chunk_err(fs_info, leaf, chunk, logical,
+	"missing chunk type flag, have 0x%llx one bit must be set in 0x%llx",
+			  type, BTRFS_BLOCK_GROUP_TYPE_MASK);
+		return -EUCLEAN;
+	}
+
+	if ((type & BTRFS_BLOCK_GROUP_SYSTEM) &&
+	    (type & (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA))) {
+		chunk_err(fs_info, leaf, chunk, logical,
+			  "system chunk with data or metadata type: 0x%llx",
+			  type);
+		return -EUCLEAN;
+	}
+
+	features = btrfs_super_incompat_flags(fs_info->super_copy);
+	if (features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
+		mixed = true;
+
+	if (!mixed) {
+		if ((type & BTRFS_BLOCK_GROUP_METADATA) &&
+		    (type & BTRFS_BLOCK_GROUP_DATA)) {
+			chunk_err(fs_info, leaf, chunk, logical,
+			"mixed chunk type in non-mixed mode: 0x%llx", type);
+			return -EUCLEAN;
+		}
+	}
+
+	if ((type & BTRFS_BLOCK_GROUP_RAID10 && sub_stripes != 2) ||
+	    (type & BTRFS_BLOCK_GROUP_RAID1 && num_stripes != 2) ||
+	    (type & BTRFS_BLOCK_GROUP_RAID5 && num_stripes < 2) ||
+	    (type & BTRFS_BLOCK_GROUP_RAID6 && num_stripes < 3) ||
+	    (type & BTRFS_BLOCK_GROUP_DUP && num_stripes != 2) ||
+	    ((type & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 && num_stripes != 1)) {
+		chunk_err(fs_info, leaf, chunk, logical,
+			"invalid num_stripes:sub_stripes %u:%u for profile %llu",
+			num_stripes, sub_stripes,
+			type & BTRFS_BLOCK_GROUP_PROFILE_MASK);
+		return -EUCLEAN;
+	}
+
+	return 0;
+}
+
+__printf(4, 5)
+__cold
+static void dev_item_err(const struct btrfs_fs_info *fs_info,
+			 const struct extent_buffer *eb, int slot,
+			 const char *fmt, ...)
+{
+	struct btrfs_key key;
+	struct va_format vaf;
+	va_list args;
+
+	btrfs_item_key_to_cpu(eb, &key, slot);
+	va_start(args, fmt);
+
+	vaf.fmt = fmt;
+	vaf.va = &args;
+
+	btrfs_crit(fs_info,
+	"corrupt %s: root=%llu block=%llu slot=%d devid=%llu %pV",
+		btrfs_header_level(eb) == 0 ? "leaf" : "node",
+		btrfs_header_owner(eb), btrfs_header_bytenr(eb), slot,
+		key.objectid, &vaf);
+	va_end(args);
+}
+
+static int check_dev_item(struct btrfs_fs_info *fs_info,
+			  struct extent_buffer *leaf,
+			  struct btrfs_key *key, int slot)
+{
+	struct btrfs_dev_item *ditem;
+
+	if (key->objectid != BTRFS_DEV_ITEMS_OBJECTID) {
+		dev_item_err(fs_info, leaf, slot,
+			     "invalid objectid: has=%llu expect=%llu",
+			     key->objectid, BTRFS_DEV_ITEMS_OBJECTID);
+		return -EUCLEAN;
+	}
+	ditem = btrfs_item_ptr(leaf, slot, struct btrfs_dev_item);
+	if (btrfs_device_id(leaf, ditem) != key->offset) {
+		dev_item_err(fs_info, leaf, slot,
+			     "devid mismatch: key has=%llu item has=%llu",
+			     key->offset, btrfs_device_id(leaf, ditem));
+		return -EUCLEAN;
+	}
+
+	/*
+	 * For device total_bytes, we don't have reliable way to check it, as
+	 * it can be 0 for device removal. Device size check can only be done
+	 * by dev extents check.
+	 */
+	if (btrfs_device_bytes_used(leaf, ditem) >
+	    btrfs_device_total_bytes(leaf, ditem)) {
+		dev_item_err(fs_info, leaf, slot,
+			     "invalid bytes used: have %llu expect [0, %llu]",
+			     btrfs_device_bytes_used(leaf, ditem),
+			     btrfs_device_total_bytes(leaf, ditem));
+		return -EUCLEAN;
+	}
+	/*
+	 * Remaining members like io_align/type/gen/dev_group aren't really
+	 * utilized.  Skip them to make later usage of them easier.
+	 */
+	return 0;
+}
+
+/* Inode item error output has the same format as dir_item_err() */
+#define inode_item_err(fs_info, eb, slot, fmt, ...)			\
+	dir_item_err(fs_info, eb, slot, fmt, __VA_ARGS__)
+
+static int check_inode_item(struct btrfs_fs_info *fs_info,
+			    struct extent_buffer *leaf,
+			    struct btrfs_key *key, int slot)
+{
+	struct btrfs_inode_item *iitem;
+	u64 super_gen = btrfs_super_generation(fs_info->super_copy);
+	u32 valid_mask = (S_IFMT | S_ISUID | S_ISGID | S_ISVTX | 0777);
+	u32 mode;
+
+	if ((key->objectid < BTRFS_FIRST_FREE_OBJECTID ||
+	     key->objectid > BTRFS_LAST_FREE_OBJECTID) &&
+	    key->objectid != BTRFS_ROOT_TREE_DIR_OBJECTID &&
+	    key->objectid != BTRFS_FREE_INO_OBJECTID) {
+		generic_err(fs_info, leaf, slot,
+	"invalid key objectid: has %llu expect %llu or [%llu, %llu] or %llu",
+			    key->objectid, BTRFS_ROOT_TREE_DIR_OBJECTID,
+			    BTRFS_FIRST_FREE_OBJECTID,
+			    BTRFS_LAST_FREE_OBJECTID,
+			    BTRFS_FREE_INO_OBJECTID);
+		return -EUCLEAN;
+	}
+	if (key->offset != 0) {
+		inode_item_err(fs_info, leaf, slot,
+			"invalid key offset: has %llu expect 0",
+			key->offset);
+		return -EUCLEAN;
+	}
+	iitem = btrfs_item_ptr(leaf, slot, struct btrfs_inode_item);
+
+	/* Here we use super block generation + 1 to handle log tree */
+	if (btrfs_inode_generation(leaf, iitem) > super_gen + 1) {
+		inode_item_err(fs_info, leaf, slot,
+			"invalid inode generation: has %llu expect (0, %llu]",
+			       btrfs_inode_generation(leaf, iitem),
+			       super_gen + 1);
+		return -EUCLEAN;
+	}
+	/* Note for ROOT_TREE_DIR_ITEM, mkfs could set its transid 0 */
+	if (btrfs_inode_transid(leaf, iitem) > super_gen + 1) {
+		inode_item_err(fs_info, leaf, slot,
+			"invalid inode transid: has %llu expect [0, %llu]",
+			       btrfs_inode_transid(leaf, iitem), super_gen + 1);
+		return -EUCLEAN;
+	}
+
+	/*
+	 * For size and nbytes it's better not to be too strict, as for dir
+	 * item its size/nbytes can easily get wrong, but doesn't affect
+	 * anything in the fs. So here we skip the check.
+	 */
+	mode = btrfs_inode_mode(leaf, iitem);
+	if (mode & ~valid_mask) {
+		inode_item_err(fs_info, leaf, slot,
+			       "unknown mode bit detected: 0x%x",
+			       mode & ~valid_mask);
+		return -EUCLEAN;
+	}
+
+	/*
+	 * S_IFMT is not bit mapped so we can't completely rely on is_power_of_2,
+	 * but is_power_of_2() can save us from checking FIFO/CHR/DIR/REG.
+	 * Only needs to check BLK, LNK and SOCKS
+	 */
+	if (!is_power_of_2(mode & S_IFMT)) {
+		if (!S_ISLNK(mode) && !S_ISBLK(mode) && !S_ISSOCK(mode)) {
+			inode_item_err(fs_info, leaf, slot,
+			"invalid mode: has 0%o expect valid S_IF* bit(s)",
+				       mode & S_IFMT);
+			return -EUCLEAN;
+		}
+	}
+	if (S_ISDIR(mode) && btrfs_inode_nlink(leaf, iitem) > 1) {
+		inode_item_err(fs_info, leaf, slot,
+		       "invalid nlink: has %u expect no more than 1 for dir",
+			btrfs_inode_nlink(leaf, iitem));
+		return -EUCLEAN;
+	}
+	if (btrfs_inode_flags(leaf, iitem) & ~BTRFS_INODE_FLAG_MASK) {
+		inode_item_err(fs_info, leaf, slot,
+			       "unknown flags detected: 0x%llx",
+			       btrfs_inode_flags(leaf, iitem) &
+			       ~BTRFS_INODE_FLAG_MASK);
+		return -EUCLEAN;
+	}
+	return 0;
+}
+
 /*
  * Common point to switch the item-specific validation.
  */
@@ -456,6 +770,7 @@ static int check_leaf_item(struct btrfs_fs_info *fs_info,
 			   struct btrfs_key *key, int slot)
 {
 	int ret = 0;
+	struct btrfs_chunk *chunk;
 
 	switch (key->type) {
 	case BTRFS_EXTENT_DATA_KEY:
@@ -472,6 +787,17 @@ static int check_leaf_item(struct btrfs_fs_info *fs_info,
 	case BTRFS_BLOCK_GROUP_ITEM_KEY:
 		ret = check_block_group_item(fs_info, leaf, key, slot);
 		break;
+	case BTRFS_CHUNK_ITEM_KEY:
+		chunk = btrfs_item_ptr(leaf, slot, struct btrfs_chunk);
+		ret = btrfs_check_chunk_valid(fs_info, leaf, chunk,
+					      key->offset);
+		break;
+	case BTRFS_DEV_ITEM_KEY:
+		ret = check_dev_item(fs_info, leaf, key, slot);
+		break;
+	case BTRFS_INODE_ITEM_KEY:
+		ret = check_inode_item(fs_info, leaf, key, slot);
+		break;
 	}
 	return ret;
 }
diff --git linux-libre-4.19.155-gnu/fs/btrfs/tree-checker.h linux-libre-4.19.156-gnu/fs/btrfs/tree-checker.h
index ff043275b784..4df45e8a6659 100644
--- linux-libre-4.19.155-gnu/fs/btrfs/tree-checker.h
+++ linux-libre-4.19.156-gnu/fs/btrfs/tree-checker.h
@@ -25,4 +25,8 @@ int btrfs_check_leaf_relaxed(struct btrfs_fs_info *fs_info,
 			     struct extent_buffer *leaf);
 int btrfs_check_node(struct btrfs_fs_info *fs_info, struct extent_buffer *node);
 
+int btrfs_check_chunk_valid(struct btrfs_fs_info *fs_info,
+			    struct extent_buffer *leaf,
+			    struct btrfs_chunk *chunk, u64 logical);
+
 #endif
diff --git linux-libre-4.19.155-gnu/fs/btrfs/volumes.c linux-libre-4.19.156-gnu/fs/btrfs/volumes.c
index 0879e3dc39c8..05daa2b816c3 100644
--- linux-libre-4.19.155-gnu/fs/btrfs/volumes.c
+++ linux-libre-4.19.156-gnu/fs/btrfs/volumes.c
@@ -28,6 +28,7 @@
 #include "math.h"
 #include "dev-replace.h"
 #include "sysfs.h"
+#include "tree-checker.h"
 
 const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES] = {
 	[BTRFS_RAID_RAID10] = {
@@ -4605,15 +4606,6 @@ static void check_raid56_incompat_flag(struct btrfs_fs_info *info, u64 type)
 	btrfs_set_fs_incompat(info, RAID56);
 }
 
-#define BTRFS_MAX_DEVS(info) ((BTRFS_MAX_ITEM_SIZE(info)	\
-			- sizeof(struct btrfs_chunk))		\
-			/ sizeof(struct btrfs_stripe) + 1)
-
-#define BTRFS_MAX_DEVS_SYS_CHUNK ((BTRFS_SYSTEM_CHUNK_ARRAY_SIZE	\
-				- 2 * sizeof(struct btrfs_disk_key)	\
-				- 2 * sizeof(struct btrfs_chunk))	\
-				/ sizeof(struct btrfs_stripe) + 1)
-
 static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
 			       u64 start, u64 type)
 {
@@ -6370,99 +6362,6 @@ struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info,
 	return dev;
 }
 
-/* Return -EIO if any error, otherwise return 0. */
-static int btrfs_check_chunk_valid(struct btrfs_fs_info *fs_info,
-				   struct extent_buffer *leaf,
-				   struct btrfs_chunk *chunk, u64 logical)
-{
-	u64 length;
-	u64 stripe_len;
-	u16 num_stripes;
-	u16 sub_stripes;
-	u64 type;
-	u64 features;
-	bool mixed = false;
-
-	length = btrfs_chunk_length(leaf, chunk);
-	stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
-	num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
-	sub_stripes = btrfs_chunk_sub_stripes(leaf, chunk);
-	type = btrfs_chunk_type(leaf, chunk);
-
-	if (!num_stripes) {
-		btrfs_err(fs_info, "invalid chunk num_stripes: %u",
-			  num_stripes);
-		return -EIO;
-	}
-	if (!IS_ALIGNED(logical, fs_info->sectorsize)) {
-		btrfs_err(fs_info, "invalid chunk logical %llu", logical);
-		return -EIO;
-	}
-	if (btrfs_chunk_sector_size(leaf, chunk) != fs_info->sectorsize) {
-		btrfs_err(fs_info, "invalid chunk sectorsize %u",
-			  btrfs_chunk_sector_size(leaf, chunk));
-		return -EIO;
-	}
-	if (!length || !IS_ALIGNED(length, fs_info->sectorsize)) {
-		btrfs_err(fs_info, "invalid chunk length %llu", length);
-		return -EIO;
-	}
-	if (!is_power_of_2(stripe_len) || stripe_len != BTRFS_STRIPE_LEN) {
-		btrfs_err(fs_info, "invalid chunk stripe length: %llu",
-			  stripe_len);
-		return -EIO;
-	}
-	if (~(BTRFS_BLOCK_GROUP_TYPE_MASK | BTRFS_BLOCK_GROUP_PROFILE_MASK) &
-	    type) {
-		btrfs_err(fs_info, "unrecognized chunk type: %llu",
-			  ~(BTRFS_BLOCK_GROUP_TYPE_MASK |
-			    BTRFS_BLOCK_GROUP_PROFILE_MASK) &
-			  btrfs_chunk_type(leaf, chunk));
-		return -EIO;
-	}
-
-	if ((type & BTRFS_BLOCK_GROUP_TYPE_MASK) == 0) {
-		btrfs_err(fs_info, "missing chunk type flag: 0x%llx", type);
-		return -EIO;
-	}
-
-	if ((type & BTRFS_BLOCK_GROUP_SYSTEM) &&
-	    (type & (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA))) {
-		btrfs_err(fs_info,
-			"system chunk with data or metadata type: 0x%llx", type);
-		return -EIO;
-	}
-
-	features = btrfs_super_incompat_flags(fs_info->super_copy);
-	if (features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
-		mixed = true;
-
-	if (!mixed) {
-		if ((type & BTRFS_BLOCK_GROUP_METADATA) &&
-		    (type & BTRFS_BLOCK_GROUP_DATA)) {
-			btrfs_err(fs_info,
-			"mixed chunk type in non-mixed mode: 0x%llx", type);
-			return -EIO;
-		}
-	}
-
-	if ((type & BTRFS_BLOCK_GROUP_RAID10 && sub_stripes != 2) ||
-	    (type & BTRFS_BLOCK_GROUP_RAID1 && num_stripes != 2) ||
-	    (type & BTRFS_BLOCK_GROUP_RAID5 && num_stripes < 2) ||
-	    (type & BTRFS_BLOCK_GROUP_RAID6 && num_stripes < 3) ||
-	    (type & BTRFS_BLOCK_GROUP_DUP && num_stripes != 2) ||
-	    ((type & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 &&
-	     num_stripes != 1)) {
-		btrfs_err(fs_info,
-			"invalid num_stripes:sub_stripes %u:%u for profile %llu",
-			num_stripes, sub_stripes,
-			type & BTRFS_BLOCK_GROUP_PROFILE_MASK);
-		return -EIO;
-	}
-
-	return 0;
-}
-
 static void btrfs_report_missing_device(struct btrfs_fs_info *fs_info,
 					u64 devid, u8 *uuid, bool error)
 {
@@ -6493,9 +6392,15 @@ static int read_one_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key,
 	length = btrfs_chunk_length(leaf, chunk);
 	num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
 
-	ret = btrfs_check_chunk_valid(fs_info, leaf, chunk, logical);
-	if (ret)
-		return ret;
+	/*
+	 * Only need to verify chunk item if we're reading from sys chunk array,
+	 * as chunk item in tree block is already verified by tree-checker.
+	 */
+	if (leaf->start == BTRFS_SUPER_INFO_OFFSET) {
+		ret = btrfs_check_chunk_valid(fs_info, leaf, chunk, logical);
+		if (ret)
+			return ret;
+	}
 
 	read_lock(&map_tree->map_tree.lock);
 	em = lookup_extent_mapping(&map_tree->map_tree, logical, 1);
diff --git linux-libre-4.19.155-gnu/fs/btrfs/volumes.h linux-libre-4.19.156-gnu/fs/btrfs/volumes.h
index 8e8bf3246de1..65cd023b097c 100644
--- linux-libre-4.19.155-gnu/fs/btrfs/volumes.h
+++ linux-libre-4.19.156-gnu/fs/btrfs/volumes.h
@@ -257,6 +257,15 @@ struct btrfs_fs_devices {
 
 #define BTRFS_BIO_INLINE_CSUM_SIZE	64
 
+#define BTRFS_MAX_DEVS(info) ((BTRFS_MAX_ITEM_SIZE(info)	\
+			- sizeof(struct btrfs_chunk))		\
+			/ sizeof(struct btrfs_stripe) + 1)
+
+#define BTRFS_MAX_DEVS_SYS_CHUNK ((BTRFS_SYSTEM_CHUNK_ARRAY_SIZE	\
+				- 2 * sizeof(struct btrfs_disk_key)	\
+				- 2 * sizeof(struct btrfs_chunk))	\
+				/ sizeof(struct btrfs_stripe) + 1)
+
 /*
  * we need the mirror number and stripe index to be passed around
  * the call chain while we are processing end_io (especially errors).
diff --git linux-libre-4.19.155-gnu/fs/gfs2/glock.c linux-libre-4.19.156-gnu/fs/gfs2/glock.c
index ccdd8c821abd..c20d71d86812 100644
--- linux-libre-4.19.155-gnu/fs/gfs2/glock.c
+++ linux-libre-4.19.156-gnu/fs/gfs2/glock.c
@@ -870,7 +870,8 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
 out_free:
 	kfree(gl->gl_lksb.sb_lvbptr);
 	kmem_cache_free(cachep, gl);
-	atomic_dec(&sdp->sd_glock_disposal);
+	if (atomic_dec_and_test(&sdp->sd_glock_disposal))
+		wake_up(&sdp->sd_glock_wait);
 
 out:
 	return ret;
diff --git linux-libre-4.19.155-gnu/include/asm-generic/pgtable.h linux-libre-4.19.156-gnu/include/asm-generic/pgtable.h
index 15fd0277ffa6..5901b0005929 100644
--- linux-libre-4.19.155-gnu/include/asm-generic/pgtable.h
+++ linux-libre-4.19.156-gnu/include/asm-generic/pgtable.h
@@ -1115,10 +1115,6 @@ static inline bool arch_has_pfn_modify_check(void)
 
 #endif /* !__ASSEMBLY__ */
 
-#ifndef io_remap_pfn_range
-#define io_remap_pfn_range remap_pfn_range
-#endif
-
 #ifndef has_transparent_hugepage
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 #define has_transparent_hugepage() 1
diff --git linux-libre-4.19.155-gnu/include/linux/mm.h linux-libre-4.19.156-gnu/include/linux/mm.h
index 83828c118b6b..f6ecf41aea83 100644
--- linux-libre-4.19.155-gnu/include/linux/mm.h
+++ linux-libre-4.19.156-gnu/include/linux/mm.h
@@ -2561,6 +2561,15 @@ static inline vm_fault_t vmf_insert_pfn(struct vm_area_struct *vma,
 	return VM_FAULT_NOPAGE;
 }
 
+#ifndef io_remap_pfn_range
+static inline int io_remap_pfn_range(struct vm_area_struct *vma,
+				     unsigned long addr, unsigned long pfn,
+				     unsigned long size, pgprot_t prot)
+{
+	return remap_pfn_range(vma, addr, pfn, size, pgprot_decrypted(prot));
+}
+#endif
+
 static inline vm_fault_t vmf_error(int err)
 {
 	if (err == -ENOMEM)
diff --git linux-libre-4.19.155-gnu/include/net/dsa.h linux-libre-4.19.156-gnu/include/net/dsa.h
index 461e8a7661b7..d28df7adf948 100644
--- linux-libre-4.19.155-gnu/include/net/dsa.h
+++ linux-libre-4.19.156-gnu/include/net/dsa.h
@@ -196,6 +196,7 @@ struct dsa_port {
 	unsigned int		index;
 	const char		*name;
 	const struct dsa_port	*cpu_dp;
+	const char		*mac;
 	struct device_node	*dn;
 	unsigned int		ageing_time;
 	u8			stp_state;
diff --git linux-libre-4.19.155-gnu/kernel/events/core.c linux-libre-4.19.156-gnu/kernel/events/core.c
index a35d742b0ba8..8b94eb6437c1 100644
--- linux-libre-4.19.155-gnu/kernel/events/core.c
+++ linux-libre-4.19.156-gnu/kernel/events/core.c
@@ -9047,6 +9047,7 @@ perf_event_parse_addr_filter(struct perf_event *event, char *fstr,
 			if (token == IF_SRC_FILE || token == IF_SRC_FILEADDR) {
 				int fpos = token == IF_SRC_FILE ? 2 : 1;
 
+				kfree(filename);
 				filename = match_strdup(&args[fpos]);
 				if (!filename) {
 					ret = -ENOMEM;
@@ -9093,16 +9094,13 @@ perf_event_parse_addr_filter(struct perf_event *event, char *fstr,
 				 */
 				ret = -EOPNOTSUPP;
 				if (!event->ctx->task)
-					goto fail_free_name;
+					goto fail;
 
 				/* look up the path and grab its inode */
 				ret = kern_path(filename, LOOKUP_FOLLOW,
 						&filter->path);
 				if (ret)
-					goto fail_free_name;
-
-				kfree(filename);
-				filename = NULL;
+					goto fail;
 
 				ret = -EINVAL;
 				if (!filter->path.dentry ||
@@ -9122,13 +9120,13 @@ perf_event_parse_addr_filter(struct perf_event *event, char *fstr,
 	if (state != IF_STATE_ACTION)
 		goto fail;
 
+	kfree(filename);
 	kfree(orig);
 
 	return 0;
 
-fail_free_name:
-	kfree(filename);
 fail:
+	kfree(filename);
 	free_filters_list(filters);
 	kfree(orig);
 
diff --git linux-libre-4.19.155-gnu/kernel/fork.c linux-libre-4.19.156-gnu/kernel/fork.c
index 3ed29bf8eb29..f2c92c100194 100644
--- linux-libre-4.19.155-gnu/kernel/fork.c
+++ linux-libre-4.19.156-gnu/kernel/fork.c
@@ -1965,14 +1965,9 @@ static __latent_entropy struct task_struct *copy_process(
 	/* ok, now we should be set up.. */
 	p->pid = pid_nr(pid);
 	if (clone_flags & CLONE_THREAD) {
-		p->exit_signal = -1;
 		p->group_leader = current->group_leader;
 		p->tgid = current->tgid;
 	} else {
-		if (clone_flags & CLONE_PARENT)
-			p->exit_signal = current->group_leader->exit_signal;
-		else
-			p->exit_signal = (clone_flags & CSIGNAL);
 		p->group_leader = p;
 		p->tgid = p->pid;
 	}
@@ -2017,9 +2012,14 @@ static __latent_entropy struct task_struct *copy_process(
 	if (clone_flags & (CLONE_PARENT|CLONE_THREAD)) {
 		p->real_parent = current->real_parent;
 		p->parent_exec_id = current->parent_exec_id;
+		if (clone_flags & CLONE_THREAD)
+			p->exit_signal = -1;
+		else
+			p->exit_signal = current->group_leader->exit_signal;
 	} else {
 		p->real_parent = current;
 		p->parent_exec_id = current->self_exec_id;
+		p->exit_signal = (clone_flags & CSIGNAL);
 	}
 
 	klp_copy_process(p);
diff --git linux-libre-4.19.155-gnu/kernel/futex.c linux-libre-4.19.156-gnu/kernel/futex.c
index eabb9180ffa8..52f641c00a65 100644
--- linux-libre-4.19.155-gnu/kernel/futex.c
+++ linux-libre-4.19.156-gnu/kernel/futex.c
@@ -2417,10 +2417,22 @@ retry:
 		}
 
 		/*
-		 * Since we just failed the trylock; there must be an owner.
+		 * The trylock just failed, so either there is an owner or
+		 * there is a higher priority waiter than this one.
 		 */
 		newowner = rt_mutex_owner(&pi_state->pi_mutex);
-		BUG_ON(!newowner);
+		/*
+		 * If the higher priority waiter has not yet taken over the
+		 * rtmutex then newowner is NULL. We can't return here with
+		 * that state because it's inconsistent vs. the user space
+		 * state. So drop the locks and try again. It's a valid
+		 * situation and not any different from the other retry
+		 * conditions.
+		 */
+		if (unlikely(!newowner)) {
+			err = -EAGAIN;
+			goto handle_err;
+		}
 	} else {
 		WARN_ON_ONCE(argowner != current);
 		if (oldowner == current) {
diff --git linux-libre-4.19.155-gnu/kernel/kthread.c linux-libre-4.19.156-gnu/kernel/kthread.c
index b786eda90bb5..2eed853ab9cc 100644
--- linux-libre-4.19.155-gnu/kernel/kthread.c
+++ linux-libre-4.19.156-gnu/kernel/kthread.c
@@ -863,7 +863,8 @@ void kthread_delayed_work_timer_fn(struct timer_list *t)
 	/* Move the work from worker->delayed_work_list. */
 	WARN_ON_ONCE(list_empty(&work->node));
 	list_del_init(&work->node);
-	kthread_insert_work(worker, work, &worker->work_list);
+	if (!work->canceling)
+		kthread_insert_work(worker, work, &worker->work_list);
 
 	spin_unlock(&worker->lock);
 }
diff --git linux-libre-4.19.155-gnu/kernel/signal.c linux-libre-4.19.156-gnu/kernel/signal.c
index 6a5692118139..a02a25acf205 100644
--- linux-libre-4.19.155-gnu/kernel/signal.c
+++ linux-libre-4.19.156-gnu/kernel/signal.c
@@ -385,16 +385,17 @@ static bool task_participate_group_stop(struct task_struct *task)
 
 void task_join_group_stop(struct task_struct *task)
 {
+	unsigned long mask = current->jobctl & JOBCTL_STOP_SIGMASK;
+	struct signal_struct *sig = current->signal;
+
+	if (sig->group_stop_count) {
+		sig->group_stop_count++;
+		mask |= JOBCTL_STOP_CONSUME;
+	} else if (!(sig->flags & SIGNAL_STOP_STOPPED))
+		return;
+
 	/* Have the new thread join an on-going signal group stop */
-	unsigned long jobctl = current->jobctl;
-	if (jobctl & JOBCTL_STOP_PENDING) {
-		struct signal_struct *sig = current->signal;
-		unsigned long signr = jobctl & JOBCTL_STOP_SIGMASK;
-		unsigned long gstop = JOBCTL_STOP_PENDING | JOBCTL_STOP_CONSUME;
-		if (task_set_jobctl_pending(task, signr | gstop)) {
-			sig->group_stop_count++;
-		}
-	}
+	task_set_jobctl_pending(task, mask | JOBCTL_STOP_PENDING);
 }
 
 /*
diff --git linux-libre-4.19.155-gnu/kernel/trace/blktrace.c linux-libre-4.19.156-gnu/kernel/trace/blktrace.c
index 1442f6152abc..645048bb1e86 100644
--- linux-libre-4.19.155-gnu/kernel/trace/blktrace.c
+++ linux-libre-4.19.156-gnu/kernel/trace/blktrace.c
@@ -521,10 +521,18 @@ static int do_blk_trace_setup(struct request_queue *q, char *name, dev_t dev,
 	if (!bt->msg_data)
 		goto err;
 
-	ret = -ENOENT;
-
-	dir = debugfs_lookup(buts->name, blk_debugfs_root);
-	if (!dir)
+#ifdef CONFIG_BLK_DEBUG_FS
+	/*
+	 * When tracing whole make_request drivers (multiqueue) block devices,
+	 * reuse the existing debugfs directory created by the block layer on
+	 * init. For request-based block devices, all partitions block devices,
+	 * and scsi-generic block devices we create a temporary new debugfs
+	 * directory that will be removed once the trace ends.
+	 */
+	if (q->mq_ops && bdev && bdev == bdev->bd_contains)
+		dir = q->debugfs_dir;
+	else
+#endif
 		bt->dir = dir = debugfs_create_dir(buts->name, blk_debugfs_root);
 	if (!dir)
 		goto err;
@@ -583,8 +591,6 @@ static int do_blk_trace_setup(struct request_queue *q, char *name, dev_t dev,
 
 	ret = 0;
 err:
-	if (dir && !bt->dir)
-		dput(dir);
 	if (ret)
 		blk_trace_free(bt);
 	return ret;
diff --git linux-libre-4.19.155-gnu/kernel/trace/ring_buffer.c linux-libre-4.19.156-gnu/kernel/trace/ring_buffer.c
index eef05eb3b284..87ce9736043d 100644
--- linux-libre-4.19.155-gnu/kernel/trace/ring_buffer.c
+++ linux-libre-4.19.156-gnu/kernel/trace/ring_buffer.c
@@ -444,14 +444,16 @@ struct rb_event_info {
 
 /*
  * Used for which event context the event is in.
- *  NMI     = 0
- *  IRQ     = 1
- *  SOFTIRQ = 2
- *  NORMAL  = 3
+ *  TRANSITION = 0
+ *  NMI     = 1
+ *  IRQ     = 2
+ *  SOFTIRQ = 3
+ *  NORMAL  = 4
  *
  * See trace_recursive_lock() comment below for more details.
  */
 enum {
+	RB_CTX_TRANSITION,
 	RB_CTX_NMI,
 	RB_CTX_IRQ,
 	RB_CTX_SOFTIRQ,
@@ -2620,10 +2622,10 @@ rb_wakeups(struct ring_buffer *buffer, struct ring_buffer_per_cpu *cpu_buffer)
  * a bit of overhead in something as critical as function tracing,
  * we use a bitmask trick.
  *
- *  bit 0 =  NMI context
- *  bit 1 =  IRQ context
- *  bit 2 =  SoftIRQ context
- *  bit 3 =  normal context.
+ *  bit 1 =  NMI context
+ *  bit 2 =  IRQ context
+ *  bit 3 =  SoftIRQ context
+ *  bit 4 =  normal context.
  *
  * This works because this is the order of contexts that can
  * preempt other contexts. A SoftIRQ never preempts an IRQ
@@ -2646,6 +2648,30 @@ rb_wakeups(struct ring_buffer *buffer, struct ring_buffer_per_cpu *cpu_buffer)
  * The least significant bit can be cleared this way, and it
  * just so happens that it is the same bit corresponding to
  * the current context.
+ *
+ * Now the TRANSITION bit breaks the above slightly. The TRANSITION bit
+ * is set when a recursion is detected at the current context, and if
+ * the TRANSITION bit is already set, it will fail the recursion.
+ * This is needed because there's a lag between the changing of
+ * interrupt context and updating the preempt count. In this case,
+ * a false positive will be found. To handle this, one extra recursion
+ * is allowed, and this is done by the TRANSITION bit. If the TRANSITION
+ * bit is already set, then it is considered a recursion and the function
+ * ends. Otherwise, the TRANSITION bit is set, and that bit is returned.
+ *
+ * On the trace_recursive_unlock(), the TRANSITION bit will be the first
+ * to be cleared. Even if it wasn't the context that set it. That is,
+ * if an interrupt comes in while NORMAL bit is set and the ring buffer
+ * is called before preempt_count() is updated, since the check will
+ * be on the NORMAL bit, the TRANSITION bit will then be set. If an
+ * NMI then comes in, it will set the NMI bit, but when the NMI code
+ * does the trace_recursive_unlock() it will clear the TRANSTION bit
+ * and leave the NMI bit set. But this is fine, because the interrupt
+ * code that set the TRANSITION bit will then clear the NMI bit when it
+ * calls trace_recursive_unlock(). If another NMI comes in, it will
+ * set the TRANSITION bit and continue.
+ *
+ * Note: The TRANSITION bit only handles a single transition between context.
  */
 
 static __always_inline int
@@ -2661,8 +2687,16 @@ trace_recursive_lock(struct ring_buffer_per_cpu *cpu_buffer)
 		bit = pc & NMI_MASK ? RB_CTX_NMI :
 			pc & HARDIRQ_MASK ? RB_CTX_IRQ : RB_CTX_SOFTIRQ;
 
-	if (unlikely(val & (1 << (bit + cpu_buffer->nest))))
-		return 1;
+	if (unlikely(val & (1 << (bit + cpu_buffer->nest)))) {
+		/*
+		 * It is possible that this was called by transitioning
+		 * between interrupt context, and preempt_count() has not
+		 * been updated yet. In this case, use the TRANSITION bit.
+		 */
+		bit = RB_CTX_TRANSITION;
+		if (val & (1 << (bit + cpu_buffer->nest)))
+			return 1;
+	}
 
 	val |= (1 << (bit + cpu_buffer->nest));
 	cpu_buffer->current_context = val;
@@ -2677,8 +2711,8 @@ trace_recursive_unlock(struct ring_buffer_per_cpu *cpu_buffer)
 		cpu_buffer->current_context - (1 << cpu_buffer->nest);
 }
 
-/* The recursive locking above uses 4 bits */
-#define NESTED_BITS 4
+/* The recursive locking above uses 5 bits */
+#define NESTED_BITS 5
 
 /**
  * ring_buffer_nest_start - Allow to trace while nested
diff --git linux-libre-4.19.155-gnu/kernel/trace/trace.c linux-libre-4.19.156-gnu/kernel/trace/trace.c
index 6bf617ff0369..c3cc6aaa6f79 100644
--- linux-libre-4.19.155-gnu/kernel/trace/trace.c
+++ linux-libre-4.19.156-gnu/kernel/trace/trace.c
@@ -2819,7 +2819,7 @@ static char *get_trace_buf(void)
 
 	/* Interrupts must see nesting incremented before we use the buffer */
 	barrier();
-	return &buffer->buffer[buffer->nesting][0];
+	return &buffer->buffer[buffer->nesting - 1][0];
 }
 
 static void put_trace_buf(void)
diff --git linux-libre-4.19.155-gnu/kernel/trace/trace.h linux-libre-4.19.156-gnu/kernel/trace/trace.h
index ee0c6a313ed1..01475411fd1b 100644
--- linux-libre-4.19.155-gnu/kernel/trace/trace.h
+++ linux-libre-4.19.156-gnu/kernel/trace/trace.h
@@ -534,6 +534,12 @@ enum {
 
 	TRACE_GRAPH_DEPTH_START_BIT,
 	TRACE_GRAPH_DEPTH_END_BIT,
+
+	/*
+	 * When transitioning between context, the preempt_count() may
+	 * not be correct. Allow for a single recursion to cover this case.
+	 */
+	TRACE_TRANSITION_BIT,
 };
 
 #define trace_recursion_set(bit)	do { (current)->trace_recursion |= (1<<(bit)); } while (0)
@@ -588,14 +594,27 @@ static __always_inline int trace_test_and_set_recursion(int start, int max)
 		return 0;
 
 	bit = trace_get_context_bit() + start;
-	if (unlikely(val & (1 << bit)))
-		return -1;
+	if (unlikely(val & (1 << bit))) {
+		/*
+		 * It could be that preempt_count has not been updated during
+		 * a switch between contexts. Allow for a single recursion.
+		 */
+		bit = TRACE_TRANSITION_BIT;
+		if (trace_recursion_test(bit))
+			return -1;
+		trace_recursion_set(bit);
+		barrier();
+		return bit + 1;
+	}
+
+	/* Normal check passed, clear the transition to allow it again */
+	trace_recursion_clear(TRACE_TRANSITION_BIT);
 
 	val |= 1 << bit;
 	current->trace_recursion = val;
 	barrier();
 
-	return bit;
+	return bit + 1;
 }
 
 static __always_inline void trace_clear_recursion(int bit)
@@ -605,6 +624,7 @@ static __always_inline void trace_clear_recursion(int bit)
 	if (!bit)
 		return;
 
+	bit--;
 	bit = 1 << bit;
 	val &= ~bit;
 
diff --git linux-libre-4.19.155-gnu/kernel/trace/trace_selftest.c linux-libre-4.19.156-gnu/kernel/trace/trace_selftest.c
index 11e9daa4a568..330ba2b081ed 100644
--- linux-libre-4.19.155-gnu/kernel/trace/trace_selftest.c
+++ linux-libre-4.19.156-gnu/kernel/trace/trace_selftest.c
@@ -492,8 +492,13 @@ trace_selftest_function_recursion(void)
 	unregister_ftrace_function(&test_rec_probe);
 
 	ret = -1;
-	if (trace_selftest_recursion_cnt != 1) {
-		pr_cont("*callback not called once (%d)* ",
+	/*
+	 * Recursion allows for transitions between context,
+	 * and may call the callback twice.
+	 */
+	if (trace_selftest_recursion_cnt != 1 &&
+	    trace_selftest_recursion_cnt != 2) {
+		pr_cont("*callback not called once (or twice) (%d)* ",
 			trace_selftest_recursion_cnt);
 		goto out;
 	}
diff --git linux-libre-4.19.155-gnu/lib/crc32test.c linux-libre-4.19.156-gnu/lib/crc32test.c
index 97d6a57cefcc..61ddce2cff77 100644
--- linux-libre-4.19.155-gnu/lib/crc32test.c
+++ linux-libre-4.19.156-gnu/lib/crc32test.c
@@ -683,7 +683,6 @@ static int __init crc32c_test(void)
 
 	/* reduce OS noise */
 	local_irq_save(flags);
-	local_irq_disable();
 
 	nsec = ktime_get_ns();
 	for (i = 0; i < 100; i++) {
@@ -694,7 +693,6 @@ static int __init crc32c_test(void)
 	nsec = ktime_get_ns() - nsec;
 
 	local_irq_restore(flags);
-	local_irq_enable();
 
 	pr_info("crc32c: CRC_LE_BITS = %d\n", CRC_LE_BITS);
 
@@ -768,7 +766,6 @@ static int __init crc32_test(void)
 
 	/* reduce OS noise */
 	local_irq_save(flags);
-	local_irq_disable();
 
 	nsec = ktime_get_ns();
 	for (i = 0; i < 100; i++) {
@@ -783,7 +780,6 @@ static int __init crc32_test(void)
 	nsec = ktime_get_ns() - nsec;
 
 	local_irq_restore(flags);
-	local_irq_enable();
 
 	pr_info("crc32: CRC_LE_BITS = %d, CRC_BE BITS = %d\n",
 		 CRC_LE_BITS, CRC_BE_BITS);
diff --git linux-libre-4.19.155-gnu/lib/fonts/font_10x18.c linux-libre-4.19.156-gnu/lib/fonts/font_10x18.c
index 0e2deac97da0..e02f9df24d1e 100644
--- linux-libre-4.19.155-gnu/lib/fonts/font_10x18.c
+++ linux-libre-4.19.156-gnu/lib/fonts/font_10x18.c
@@ -8,7 +8,7 @@
 
 #define FONTDATAMAX 9216
 
-static struct font_data fontdata_10x18 = {
+static const struct font_data fontdata_10x18 = {
 	{ 0, 0, FONTDATAMAX, 0 }, {
 	/* 0 0x00 '^@' */
 	0x00, 0x00, /* 0000000000 */
diff --git linux-libre-4.19.155-gnu/lib/fonts/font_6x10.c linux-libre-4.19.156-gnu/lib/fonts/font_6x10.c
index 87da8acd07db..6e3c4b7691c8 100644
--- linux-libre-4.19.155-gnu/lib/fonts/font_6x10.c
+++ linux-libre-4.19.156-gnu/lib/fonts/font_6x10.c
@@ -3,7 +3,7 @@
 
 #define FONTDATAMAX 2560
 
-static struct font_data fontdata_6x10 = {
+static const struct font_data fontdata_6x10 = {
 	{ 0, 0, FONTDATAMAX, 0 }, {
 	/* 0 0x00 '^@' */
 	0x00, /* 00000000 */
diff --git linux-libre-4.19.155-gnu/lib/fonts/font_6x11.c linux-libre-4.19.156-gnu/lib/fonts/font_6x11.c
index 5e975dfa10a5..2d22a24e816f 100644
--- linux-libre-4.19.155-gnu/lib/fonts/font_6x11.c
+++ linux-libre-4.19.156-gnu/lib/fonts/font_6x11.c
@@ -9,7 +9,7 @@
 
 #define FONTDATAMAX (11*256)
 
-static struct font_data fontdata_6x11 = {
+static const struct font_data fontdata_6x11 = {
 	{ 0, 0, FONTDATAMAX, 0 }, {
 	/* 0 0x00 '^@' */
 	0x00, /* 00000000 */
diff --git linux-libre-4.19.155-gnu/lib/fonts/font_7x14.c linux-libre-4.19.156-gnu/lib/fonts/font_7x14.c
index 86d298f38505..9cc7ae2e03f7 100644
--- linux-libre-4.19.155-gnu/lib/fonts/font_7x14.c
+++ linux-libre-4.19.156-gnu/lib/fonts/font_7x14.c
@@ -8,7 +8,7 @@
 
 #define FONTDATAMAX 3584
 
-static struct font_data fontdata_7x14 = {
+static const struct font_data fontdata_7x14 = {
 	{ 0, 0, FONTDATAMAX, 0 }, {
 	/* 0 0x00 '^@' */
 	0x00, /* 0000000 */
diff --git linux-libre-4.19.155-gnu/lib/fonts/font_8x16.c linux-libre-4.19.156-gnu/lib/fonts/font_8x16.c
index 37cedd36ca5e..bab25dc59e8d 100644
--- linux-libre-4.19.155-gnu/lib/fonts/font_8x16.c
+++ linux-libre-4.19.156-gnu/lib/fonts/font_8x16.c
@@ -10,7 +10,7 @@
 
 #define FONTDATAMAX 4096
 
-static struct font_data fontdata_8x16 = {
+static const struct font_data fontdata_8x16 = {
 	{ 0, 0, FONTDATAMAX, 0 }, {
 	/* 0 0x00 '^@' */
 	0x00, /* 00000000 */
diff --git linux-libre-4.19.155-gnu/lib/fonts/font_8x8.c linux-libre-4.19.156-gnu/lib/fonts/font_8x8.c
index 8ab695538395..109d0572368f 100644
--- linux-libre-4.19.155-gnu/lib/fonts/font_8x8.c
+++ linux-libre-4.19.156-gnu/lib/fonts/font_8x8.c
@@ -9,7 +9,7 @@
 
 #define FONTDATAMAX 2048
 
-static struct font_data fontdata_8x8 = {
+static const struct font_data fontdata_8x8 = {
 	{ 0, 0, FONTDATAMAX, 0 }, {
 	/* 0 0x00 '^@' */
 	0x00, /* 00000000 */
diff --git linux-libre-4.19.155-gnu/lib/fonts/font_acorn_8x8.c linux-libre-4.19.156-gnu/lib/fonts/font_acorn_8x8.c
index 069b3e80c434..fb395f0d4031 100644
--- linux-libre-4.19.155-gnu/lib/fonts/font_acorn_8x8.c
+++ linux-libre-4.19.156-gnu/lib/fonts/font_acorn_8x8.c
@@ -5,7 +5,7 @@
 
 #define FONTDATAMAX 2048
 
-static struct font_data acorndata_8x8 = {
+static const struct font_data acorndata_8x8 = {
 { 0, 0, FONTDATAMAX, 0 }, {
 /* 00 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* ^@ */
 /* 01 */  0x7e, 0x81, 0xa5, 0x81, 0xbd, 0x99, 0x81, 0x7e, /* ^A */
diff --git linux-libre-4.19.155-gnu/lib/fonts/font_mini_4x6.c linux-libre-4.19.156-gnu/lib/fonts/font_mini_4x6.c
index 1449876c6a27..592774a90917 100644
--- linux-libre-4.19.155-gnu/lib/fonts/font_mini_4x6.c
+++ linux-libre-4.19.156-gnu/lib/fonts/font_mini_4x6.c
@@ -43,7 +43,7 @@ __END__;
 
 #define FONTDATAMAX 1536
 
-static struct font_data fontdata_mini_4x6 = {
+static const struct font_data fontdata_mini_4x6 = {
 	{ 0, 0, FONTDATAMAX, 0 }, {
 	/*{*/
 	  	/*   Char 0: ' '  */
diff --git linux-libre-4.19.155-gnu/lib/fonts/font_pearl_8x8.c linux-libre-4.19.156-gnu/lib/fonts/font_pearl_8x8.c
index 32d65551e7ed..a6f95ebce950 100644
--- linux-libre-4.19.155-gnu/lib/fonts/font_pearl_8x8.c
+++ linux-libre-4.19.156-gnu/lib/fonts/font_pearl_8x8.c
@@ -14,7 +14,7 @@
 
 #define FONTDATAMAX 2048
 
-static struct font_data fontdata_pearl8x8 = {
+static const struct font_data fontdata_pearl8x8 = {
    { 0, 0, FONTDATAMAX, 0 }, {
    /* 0 0x00 '^@' */
    0x00, /* 00000000 */
diff --git linux-libre-4.19.155-gnu/lib/fonts/font_sun12x22.c linux-libre-4.19.156-gnu/lib/fonts/font_sun12x22.c
index 641a6b4dca42..a5b65bd49604 100644
--- linux-libre-4.19.155-gnu/lib/fonts/font_sun12x22.c
+++ linux-libre-4.19.156-gnu/lib/fonts/font_sun12x22.c
@@ -3,7 +3,7 @@
 
 #define FONTDATAMAX 11264
 
-static struct font_data fontdata_sun12x22 = {
+static const struct font_data fontdata_sun12x22 = {
 	{ 0, 0, FONTDATAMAX, 0 }, {
 	/* 0 0x00 '^@' */
 	0x00, 0x00, /* 000000000000 */
diff --git linux-libre-4.19.155-gnu/lib/fonts/font_sun8x16.c linux-libre-4.19.156-gnu/lib/fonts/font_sun8x16.c
index 193fe6d988e0..e577e76a6a7c 100644
--- linux-libre-4.19.155-gnu/lib/fonts/font_sun8x16.c
+++ linux-libre-4.19.156-gnu/lib/fonts/font_sun8x16.c
@@ -3,7 +3,7 @@
 
 #define FONTDATAMAX 4096
 
-static struct font_data fontdata_sun8x16 = {
+static const struct font_data fontdata_sun8x16 = {
 { 0, 0, FONTDATAMAX, 0 }, {
 /* */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 /* */ 0x00,0x00,0x7e,0x81,0xa5,0x81,0x81,0xbd,0x99,0x81,0x81,0x7e,0x00,0x00,0x00,0x00,
diff --git linux-libre-4.19.155-gnu/mm/mempolicy.c linux-libre-4.19.156-gnu/mm/mempolicy.c
index 68c46da82aac..3cd27c1c729f 100644
--- linux-libre-4.19.155-gnu/mm/mempolicy.c
+++ linux-libre-4.19.156-gnu/mm/mempolicy.c
@@ -496,7 +496,7 @@ static int queue_pages_pte_range(pmd_t *pmd, unsigned long addr,
 	unsigned long flags = qp->flags;
 	int ret;
 	bool has_unmovable = false;
-	pte_t *pte;
+	pte_t *pte, *mapped_pte;
 	spinlock_t *ptl;
 
 	ptl = pmd_trans_huge_lock(pmd, vma);
@@ -510,7 +510,7 @@ static int queue_pages_pte_range(pmd_t *pmd, unsigned long addr,
 	if (pmd_trans_unstable(pmd))
 		return 0;
 
-	pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl);
+	mapped_pte = pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl);
 	for (; addr != end; pte++, addr += PAGE_SIZE) {
 		if (!pte_present(*pte))
 			continue;
@@ -542,7 +542,7 @@ static int queue_pages_pte_range(pmd_t *pmd, unsigned long addr,
 		} else
 			break;
 	}
-	pte_unmap_unlock(pte - 1, ptl);
+	pte_unmap_unlock(mapped_pte, ptl);
 	cond_resched();
 
 	if (has_unmovable)
diff --git linux-libre-4.19.155-gnu/net/dsa/dsa2.c linux-libre-4.19.156-gnu/net/dsa/dsa2.c
index b036c55f5cb1..7c10bc4dacd3 100644
--- linux-libre-4.19.155-gnu/net/dsa/dsa2.c
+++ linux-libre-4.19.156-gnu/net/dsa/dsa2.c
@@ -261,6 +261,7 @@ static int dsa_port_setup(struct dsa_port *dp)
 	int err = 0;
 
 	memset(&dp->devlink_port, 0, sizeof(dp->devlink_port));
+	dp->mac = of_get_mac_address(dp->dn);
 
 	if (dp->type != DSA_PORT_TYPE_UNUSED)
 		err = devlink_port_register(ds->devlink, &dp->devlink_port,
diff --git linux-libre-4.19.155-gnu/net/dsa/slave.c linux-libre-4.19.156-gnu/net/dsa/slave.c
index 8ee28b6016d8..d03c67e761df 100644
--- linux-libre-4.19.155-gnu/net/dsa/slave.c
+++ linux-libre-4.19.156-gnu/net/dsa/slave.c
@@ -1313,7 +1313,10 @@ int dsa_slave_create(struct dsa_port *port)
 	slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
 	slave_dev->hw_features |= NETIF_F_HW_TC;
 	slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
-	eth_hw_addr_inherit(slave_dev, master);
+	if (port->mac && is_valid_ether_addr(port->mac))
+		ether_addr_copy(slave_dev->dev_addr, port->mac);
+	else
+		eth_hw_addr_inherit(slave_dev, master);
 	slave_dev->priv_flags |= IFF_NO_QUEUE;
 	slave_dev->netdev_ops = &dsa_slave_netdev_ops;
 	slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
diff --git linux-libre-4.19.155-gnu/net/sctp/sm_sideeffect.c linux-libre-4.19.156-gnu/net/sctp/sm_sideeffect.c
index 567517e44811..bb4f1d0da153 100644
--- linux-libre-4.19.155-gnu/net/sctp/sm_sideeffect.c
+++ linux-libre-4.19.156-gnu/net/sctp/sm_sideeffect.c
@@ -1615,12 +1615,12 @@ static int sctp_cmd_interpreter(enum sctp_event event_type,
 			break;
 
 		case SCTP_CMD_INIT_FAILED:
-			sctp_cmd_init_failed(commands, asoc, cmd->obj.u32);
+			sctp_cmd_init_failed(commands, asoc, cmd->obj.u16);
 			break;
 
 		case SCTP_CMD_ASSOC_FAILED:
 			sctp_cmd_assoc_failed(commands, asoc, event_type,
-					      subtype, chunk, cmd->obj.u32);
+					      subtype, chunk, cmd->obj.u16);
 			break;
 
 		case SCTP_CMD_INIT_COUNTER_INC:
diff --git linux-libre-4.19.155-gnu/net/tipc/core.c linux-libre-4.19.156-gnu/net/tipc/core.c
index 49bb9fc0aa06..ce0f067d0faf 100644
--- linux-libre-4.19.155-gnu/net/tipc/core.c
+++ linux-libre-4.19.156-gnu/net/tipc/core.c
@@ -93,6 +93,11 @@ out_sk_rht:
 static void __net_exit tipc_exit_net(struct net *net)
 {
 	tipc_net_stop(net);
+
+	/* Make sure the tipc_net_finalize_work stopped
+	 * before releasing the resources.
+	 */
+	flush_scheduled_work();
 	tipc_bcast_stop(net);
 	tipc_nametbl_stop(net);
 	tipc_sk_rht_destroy(net);
diff --git linux-libre-4.19.155-gnu/net/vmw_vsock/af_vsock.c linux-libre-4.19.156-gnu/net/vmw_vsock/af_vsock.c
index c88dc8ee3144..02374459c417 100644
--- linux-libre-4.19.155-gnu/net/vmw_vsock/af_vsock.c
+++ linux-libre-4.19.156-gnu/net/vmw_vsock/af_vsock.c
@@ -629,7 +629,7 @@ struct sock *__vsock_create(struct net *net,
 		vsk->owner = get_cred(psk->owner);
 		vsk->connect_timeout = psk->connect_timeout;
 	} else {
-		vsk->trusted = capable(CAP_NET_ADMIN);
+		vsk->trusted = ns_capable_noaudit(&init_user_ns, CAP_NET_ADMIN);
 		vsk->owner = get_current_cred();
 		vsk->connect_timeout = VSOCK_DEFAULT_CONNECT_TIMEOUT;
 	}
diff --git linux-libre-4.19.155-gnu/sound/usb/pcm.c linux-libre-4.19.156-gnu/sound/usb/pcm.c
index 7743e7bc6bf2..e4d2fcc89c30 100644
--- linux-libre-4.19.155-gnu/sound/usb/pcm.c
+++ linux-libre-4.19.156-gnu/sound/usb/pcm.c
@@ -334,6 +334,7 @@ static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs,
 	switch (subs->stream->chip->usb_id) {
 	case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
 	case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
+	case USB_ID(0x22f0, 0x0006): /* Allen&Heath Qu-16 */
 		ep = 0x81;
 		ifnum = 3;
 		goto add_sync_ep_from_ifnum;
@@ -343,6 +344,7 @@ static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs,
 		ifnum = 2;
 		goto add_sync_ep_from_ifnum;
 	case USB_ID(0x2466, 0x8003): /* Fractal Audio Axe-Fx II */
+	case USB_ID(0x0499, 0x172a): /* Yamaha MODX */
 		ep = 0x86;
 		ifnum = 2;
 		goto add_sync_ep_from_ifnum;
@@ -350,6 +352,10 @@ static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs,
 		ep = 0x81;
 		ifnum = 2;
 		goto add_sync_ep_from_ifnum;
+	case USB_ID(0x1686, 0xf029): /* Zoom UAC-2 */
+		ep = 0x82;
+		ifnum = 2;
+		goto add_sync_ep_from_ifnum;
 	case USB_ID(0x1397, 0x0001): /* Behringer UFX1604 */
 	case USB_ID(0x1397, 0x0002): /* Behringer UFX1204 */
 		ep = 0x81;
diff --git linux-libre-4.19.155-gnu/sound/usb/quirks.c linux-libre-4.19.156-gnu/sound/usb/quirks.c
index e6dea1c7112b..3effe2e86197 100644
--- linux-libre-4.19.155-gnu/sound/usb/quirks.c
+++ linux-libre-4.19.156-gnu/sound/usb/quirks.c
@@ -1466,6 +1466,7 @@ u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
 	case 0x278b:  /* Rotel? */
 	case 0x292b:  /* Gustard/Ess based devices */
 	case 0x2ab6:  /* T+A devices */
+	case 0x3353:  /* Khadas devices */
 	case 0x3842:  /* EVGA */
 	case 0xc502:  /* HiBy devices */
 		if (fp->dsd_raw)
diff --git linux-libre-4.19.155-gnu/tools/perf/util/util.h linux-libre-4.19.156-gnu/tools/perf/util/util.h
index dc58254a2b69..8c01b2cfdb1a 100644
--- linux-libre-4.19.155-gnu/tools/perf/util/util.h
+++ linux-libre-4.19.156-gnu/tools/perf/util/util.h
@@ -22,7 +22,7 @@ static inline void *zalloc(size_t size)
 	return calloc(1, size);
 }
 
-#define zfree(ptr) ({ free(*ptr); *ptr = NULL; })
+#define zfree(ptr) ({ free((void *)*ptr); *ptr = NULL; })
 
 struct dirent;
 struct nsinfo;
