[gentoo-commits] proj/linux-patches:4.4 commit in: /

[Mike Pagano]

commit:     8782652b4e6d0b393bbee273c0723472ced5d772
Author:     Mike Pagano <mpagano <AT> gentoo <DOT> org>
AuthorDate: Sun Sep  9 23:25:58 2018 +0000
Commit:     Mike Pagano <mpagano <AT> gentoo <DOT> org>
CommitDate: Sun Sep  9 23:25:58 2018 +0000
URL:        https://gitweb.gentoo.org/proj/linux-patches.git/commit/?id=8782652b

Linux patch 4.4.155

 0000_README              |    4 +
 1154_linux-4.4.155.patch | 1862 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 1866 insertions(+)

diff --git a/0000_README b/0000_README
index 5a367b5..6b63ef8 100644
--- a/0000_README
+++ b/0000_README
@@ -659,6 +659,10 @@ Patch:  1153_linux-4.4.154.patch
 From:   http://www.kernel.org
 Desc:   Linux 4.4.154
 
+Patch:  1154_linux-4.4.155.patch
+From:   http://www.kernel.org
+Desc:   Linux 4.4.155
+
 Patch:  1500_XATTR_USER_PREFIX.patch
 From:   https://bugs.gentoo.org/show_bug.cgi?id=470644
 Desc:   Support for namespace user.pax.* on tmpfs.

diff --git a/1154_linux-4.4.155.patch b/1154_linux-4.4.155.patch
new file mode 100644
index 0000000..0e4fe23
--- /dev/null
+++ b/1154_linux-4.4.155.patch
@@ -0,0 +1,1862 @@
+diff --git a/Makefile b/Makefile
+index b184286cf7e6..2d9f89ec8397 100644
+--- a/Makefile
++++ b/Makefile
+@@ -1,6 +1,6 @@
+ VERSION = 4
+ PATCHLEVEL = 4
+-SUBLEVEL = 154
++SUBLEVEL = 155
+ EXTRAVERSION =
+ NAME = Blurry Fish Butt
+ 
+diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
+index 63f06a2b1f7f..bbc7cb9faa01 100644
+--- a/arch/alpha/kernel/osf_sys.c
++++ b/arch/alpha/kernel/osf_sys.c
+@@ -526,24 +526,19 @@ SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
+ SYSCALL_DEFINE1(osf_utsname, char __user *, name)
+ {
+ 	int error;
++	char tmp[5 * 32];
+ 
+ 	down_read(&uts_sem);
+-	error = -EFAULT;
+-	if (copy_to_user(name + 0, utsname()->sysname, 32))
+-		goto out;
+-	if (copy_to_user(name + 32, utsname()->nodename, 32))
+-		goto out;
+-	if (copy_to_user(name + 64, utsname()->release, 32))
+-		goto out;
+-	if (copy_to_user(name + 96, utsname()->version, 32))
+-		goto out;
+-	if (copy_to_user(name + 128, utsname()->machine, 32))
+-		goto out;
++	memcpy(tmp + 0 * 32, utsname()->sysname, 32);
++	memcpy(tmp + 1 * 32, utsname()->nodename, 32);
++	memcpy(tmp + 2 * 32, utsname()->release, 32);
++	memcpy(tmp + 3 * 32, utsname()->version, 32);
++	memcpy(tmp + 4 * 32, utsname()->machine, 32);
++	up_read(&uts_sem);
+ 
+-	error = 0;
+- out:
+-	up_read(&uts_sem);	
+-	return error;
++	if (copy_to_user(name, tmp, sizeof(tmp)))
++		return -EFAULT;
++	return 0;
+ }
+ 
+ SYSCALL_DEFINE0(getpagesize)
+@@ -561,24 +556,22 @@ SYSCALL_DEFINE0(getdtablesize)
+  */
+ SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
+ {
+-	unsigned len;
+-	int i;
++	int len, err = 0;
++	char *kname;
++	char tmp[32];
+ 
+-	if (!access_ok(VERIFY_WRITE, name, namelen))
+-		return -EFAULT;
+-
+-	len = namelen;
+-	if (len > 32)
+-		len = 32;
++	if (namelen < 0 || namelen > 32)
++		namelen = 32;
+ 
+ 	down_read(&uts_sem);
+-	for (i = 0; i < len; ++i) {
+-		__put_user(utsname()->domainname[i], name + i);
+-		if (utsname()->domainname[i] == '\0')
+-			break;
+-	}
++	kname = utsname()->domainname;
++	len = strnlen(kname, namelen);
++	len = min(len + 1, namelen);
++	memcpy(tmp, kname, len);
+ 	up_read(&uts_sem);
+ 
++	if (copy_to_user(name, tmp, len))
++		return -EFAULT;
+ 	return 0;
+ }
+ 
+@@ -741,13 +734,14 @@ SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
+ 	};
+ 	unsigned long offset;
+ 	const char *res;
+-	long len, err = -EINVAL;
++	long len;
++	char tmp[__NEW_UTS_LEN + 1];
+ 
+ 	offset = command-1;
+ 	if (offset >= ARRAY_SIZE(sysinfo_table)) {
+ 		/* Digital UNIX has a few unpublished interfaces here */
+ 		printk("sysinfo(%d)", command);
+-		goto out;
++		return -EINVAL;
+ 	}
+ 
+ 	down_read(&uts_sem);
+@@ -755,13 +749,11 @@ SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
+ 	len = strlen(res)+1;
+ 	if ((unsigned long)len > (unsigned long)count)
+ 		len = count;
+-	if (copy_to_user(buf, res, len))
+-		err = -EFAULT;
+-	else
+-		err = 0;
++	memcpy(tmp, res, len);
+ 	up_read(&uts_sem);
+- out:
+-	return err;
++	if (copy_to_user(buf, tmp, len))
++		return -EFAULT;
++	return 0;
+ }
+ 
+ SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
+diff --git a/arch/arm/boot/dts/tegra30-cardhu.dtsi b/arch/arm/boot/dts/tegra30-cardhu.dtsi
+index bb1ca158273c..1922e7a93e40 100644
+--- a/arch/arm/boot/dts/tegra30-cardhu.dtsi
++++ b/arch/arm/boot/dts/tegra30-cardhu.dtsi
+@@ -201,6 +201,7 @@
+ 			#address-cells = <1>;
+ 			#size-cells = <0>;
+ 			reg = <0x70>;
++			reset-gpio = <&gpio TEGRA_GPIO(BB, 0) GPIO_ACTIVE_LOW>;
+ 		};
+ 	};
+ 
+diff --git a/arch/powerpc/include/asm/fadump.h b/arch/powerpc/include/asm/fadump.h
+index 493e72f64b35..5768ec3c1781 100644
+--- a/arch/powerpc/include/asm/fadump.h
++++ b/arch/powerpc/include/asm/fadump.h
+@@ -194,9 +194,6 @@ struct fadump_crash_info_header {
+ 	struct cpumask	cpu_online_mask;
+ };
+ 
+-/* Crash memory ranges */
+-#define INIT_CRASHMEM_RANGES	(INIT_MEMBLOCK_REGIONS + 2)
+-
+ struct fad_crash_memory_ranges {
+ 	unsigned long long	base;
+ 	unsigned long long	size;
+diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
+index 791d4c3329c3..c3c835290131 100644
+--- a/arch/powerpc/kernel/fadump.c
++++ b/arch/powerpc/kernel/fadump.c
+@@ -35,6 +35,7 @@
+ #include <linux/crash_dump.h>
+ #include <linux/kobject.h>
+ #include <linux/sysfs.h>
++#include <linux/slab.h>
+ 
+ #include <asm/page.h>
+ #include <asm/prom.h>
+@@ -48,8 +49,10 @@ static struct fadump_mem_struct fdm;
+ static const struct fadump_mem_struct *fdm_active;
+ 
+ static DEFINE_MUTEX(fadump_mutex);
+-struct fad_crash_memory_ranges crash_memory_ranges[INIT_CRASHMEM_RANGES];
++struct fad_crash_memory_ranges *crash_memory_ranges;
++int crash_memory_ranges_size;
+ int crash_mem_ranges;
++int max_crash_mem_ranges;
+ 
+ /* Scan the Firmware Assisted dump configuration details. */
+ int __init early_init_dt_scan_fw_dump(unsigned long node,
+@@ -726,38 +729,88 @@ static int __init process_fadump(const struct fadump_mem_struct *fdm_active)
+ 	return 0;
+ }
+ 
+-static inline void fadump_add_crash_memory(unsigned long long base,
+-					unsigned long long end)
++static void free_crash_memory_ranges(void)
++{
++	kfree(crash_memory_ranges);
++	crash_memory_ranges = NULL;
++	crash_memory_ranges_size = 0;
++	max_crash_mem_ranges = 0;
++}
++
++/*
++ * Allocate or reallocate crash memory ranges array in incremental units
++ * of PAGE_SIZE.
++ */
++static int allocate_crash_memory_ranges(void)
++{
++	struct fad_crash_memory_ranges *new_array;
++	u64 new_size;
++
++	new_size = crash_memory_ranges_size + PAGE_SIZE;
++	pr_debug("Allocating %llu bytes of memory for crash memory ranges\n",
++		 new_size);
++
++	new_array = krealloc(crash_memory_ranges, new_size, GFP_KERNEL);
++	if (new_array == NULL) {
++		pr_err("Insufficient memory for setting up crash memory ranges\n");
++		free_crash_memory_ranges();
++		return -ENOMEM;
++	}
++
++	crash_memory_ranges = new_array;
++	crash_memory_ranges_size = new_size;
++	max_crash_mem_ranges = (new_size /
++				sizeof(struct fad_crash_memory_ranges));
++	return 0;
++}
++
++static inline int fadump_add_crash_memory(unsigned long long base,
++					  unsigned long long end)
+ {
+ 	if (base == end)
+-		return;
++		return 0;
++
++	if (crash_mem_ranges == max_crash_mem_ranges) {
++		int ret;
++
++		ret = allocate_crash_memory_ranges();
++		if (ret)
++			return ret;
++	}
+ 
+ 	pr_debug("crash_memory_range[%d] [%#016llx-%#016llx], %#llx bytes\n",
+ 		crash_mem_ranges, base, end - 1, (end - base));
+ 	crash_memory_ranges[crash_mem_ranges].base = base;
+ 	crash_memory_ranges[crash_mem_ranges].size = end - base;
+ 	crash_mem_ranges++;
++	return 0;
+ }
+ 
+-static void fadump_exclude_reserved_area(unsigned long long start,
++static int fadump_exclude_reserved_area(unsigned long long start,
+ 					unsigned long long end)
+ {
+ 	unsigned long long ra_start, ra_end;
++	int ret = 0;
+ 
+ 	ra_start = fw_dump.reserve_dump_area_start;
+ 	ra_end = ra_start + fw_dump.reserve_dump_area_size;
+ 
+ 	if ((ra_start < end) && (ra_end > start)) {
+ 		if ((start < ra_start) && (end > ra_end)) {
+-			fadump_add_crash_memory(start, ra_start);
+-			fadump_add_crash_memory(ra_end, end);
++			ret = fadump_add_crash_memory(start, ra_start);
++			if (ret)
++				return ret;
++
++			ret = fadump_add_crash_memory(ra_end, end);
+ 		} else if (start < ra_start) {
+-			fadump_add_crash_memory(start, ra_start);
++			ret = fadump_add_crash_memory(start, ra_start);
+ 		} else if (ra_end < end) {
+-			fadump_add_crash_memory(ra_end, end);
++			ret = fadump_add_crash_memory(ra_end, end);
+ 		}
+ 	} else
+-		fadump_add_crash_memory(start, end);
++		ret = fadump_add_crash_memory(start, end);
++
++	return ret;
+ }
+ 
+ static int fadump_init_elfcore_header(char *bufp)
+@@ -793,10 +846,11 @@ static int fadump_init_elfcore_header(char *bufp)
+  * Traverse through memblock structure and setup crash memory ranges. These
+  * ranges will be used create PT_LOAD program headers in elfcore header.
+  */
+-static void fadump_setup_crash_memory_ranges(void)
++static int fadump_setup_crash_memory_ranges(void)
+ {
+ 	struct memblock_region *reg;
+ 	unsigned long long start, end;
++	int ret;
+ 
+ 	pr_debug("Setup crash memory ranges.\n");
+ 	crash_mem_ranges = 0;
+@@ -807,7 +861,9 @@ static void fadump_setup_crash_memory_ranges(void)
+ 	 * specified during fadump registration. We need to create a separate
+ 	 * program header for this chunk with the correct offset.
+ 	 */
+-	fadump_add_crash_memory(RMA_START, fw_dump.boot_memory_size);
++	ret = fadump_add_crash_memory(RMA_START, fw_dump.boot_memory_size);
++	if (ret)
++		return ret;
+ 
+ 	for_each_memblock(memory, reg) {
+ 		start = (unsigned long long)reg->base;
+@@ -816,8 +872,12 @@ static void fadump_setup_crash_memory_ranges(void)
+ 			start = fw_dump.boot_memory_size;
+ 
+ 		/* add this range excluding the reserved dump area. */
+-		fadump_exclude_reserved_area(start, end);
++		ret = fadump_exclude_reserved_area(start, end);
++		if (ret)
++			return ret;
+ 	}
++
++	return 0;
+ }
+ 
+ /*
+@@ -941,6 +1001,7 @@ static void register_fadump(void)
+ {
+ 	unsigned long addr;
+ 	void *vaddr;
++	int ret;
+ 
+ 	/*
+ 	 * If no memory is reserved then we can not register for firmware-
+@@ -949,7 +1010,9 @@ static void register_fadump(void)
+ 	if (!fw_dump.reserve_dump_area_size)
+ 		return;
+ 
+-	fadump_setup_crash_memory_ranges();
++	ret = fadump_setup_crash_memory_ranges();
++	if (ret)
++		return ret;
+ 
+ 	addr = be64_to_cpu(fdm.rmr_region.destination_address) + be64_to_cpu(fdm.rmr_region.source_len);
+ 	/* Initialize fadump crash info header. */
+@@ -1028,6 +1091,7 @@ void fadump_cleanup(void)
+ 	} else if (fw_dump.dump_registered) {
+ 		/* Un-register Firmware-assisted dump if it was registered. */
+ 		fadump_unregister_dump(&fdm);
++		free_crash_memory_ranges();
+ 	}
+ }
+ 
+diff --git a/arch/powerpc/platforms/pseries/ras.c b/arch/powerpc/platforms/pseries/ras.c
+index 3b6647e574b6..f5313a78e5d6 100644
+--- a/arch/powerpc/platforms/pseries/ras.c
++++ b/arch/powerpc/platforms/pseries/ras.c
+@@ -300,7 +300,7 @@ static struct rtas_error_log *fwnmi_get_errinfo(struct pt_regs *regs)
+ 	}
+ 
+ 	savep = __va(regs->gpr[3]);
+-	regs->gpr[3] = savep[0];	/* restore original r3 */
++	regs->gpr[3] = be64_to_cpu(savep[0]);	/* restore original r3 */
+ 
+ 	/* If it isn't an extended log we can use the per cpu 64bit buffer */
+ 	h = (struct rtas_error_log *)&savep[1];
+diff --git a/arch/sparc/kernel/sys_sparc_32.c b/arch/sparc/kernel/sys_sparc_32.c
+index 646988d4c1a3..740f43b9b541 100644
+--- a/arch/sparc/kernel/sys_sparc_32.c
++++ b/arch/sparc/kernel/sys_sparc_32.c
+@@ -201,23 +201,27 @@ SYSCALL_DEFINE5(rt_sigaction, int, sig,
+ 
+ asmlinkage long sys_getdomainname(char __user *name, int len)
+ {
+- 	int nlen, err;
+- 	
++	int nlen, err;
++	char tmp[__NEW_UTS_LEN + 1];
++
+ 	if (len < 0)
+ 		return -EINVAL;
+ 
+- 	down_read(&uts_sem);
+- 	
++	down_read(&uts_sem);
++
+ 	nlen = strlen(utsname()->domainname) + 1;
+ 	err = -EINVAL;
+ 	if (nlen > len)
+-		goto out;
++		goto out_unlock;
++	memcpy(tmp, utsname()->domainname, nlen);
+ 
+-	err = -EFAULT;
+-	if (!copy_to_user(name, utsname()->domainname, nlen))
+-		err = 0;
++	up_read(&uts_sem);
+ 
+-out:
++	if (copy_to_user(name, tmp, nlen))
++		return -EFAULT;
++	return 0;
++
++out_unlock:
+ 	up_read(&uts_sem);
+ 	return err;
+ }
+diff --git a/arch/sparc/kernel/sys_sparc_64.c b/arch/sparc/kernel/sys_sparc_64.c
+index 7f0f7c01b297..f63cd2ea8470 100644
+--- a/arch/sparc/kernel/sys_sparc_64.c
++++ b/arch/sparc/kernel/sys_sparc_64.c
+@@ -524,23 +524,27 @@ extern void check_pending(int signum);
+ 
+ SYSCALL_DEFINE2(getdomainname, char __user *, name, int, len)
+ {
+-        int nlen, err;
++	int nlen, err;
++	char tmp[__NEW_UTS_LEN + 1];
+ 
+ 	if (len < 0)
+ 		return -EINVAL;
+ 
+- 	down_read(&uts_sem);
+- 	
++	down_read(&uts_sem);
++
+ 	nlen = strlen(utsname()->domainname) + 1;
+ 	err = -EINVAL;
+ 	if (nlen > len)
+-		goto out;
++		goto out_unlock;
++	memcpy(tmp, utsname()->domainname, nlen);
++
++	up_read(&uts_sem);
+ 
+-	err = -EFAULT;
+-	if (!copy_to_user(name, utsname()->domainname, nlen))
+-		err = 0;
++	if (copy_to_user(name, tmp, nlen))
++		return -EFAULT;
++	return 0;
+ 
+-out:
++out_unlock:
+ 	up_read(&uts_sem);
+ 	return err;
+ }
+diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
+index 9016b4b70375..6c5020163db0 100644
+--- a/arch/x86/include/asm/io.h
++++ b/arch/x86/include/asm/io.h
+@@ -351,4 +351,10 @@ extern void arch_phys_wc_del(int handle);
+ #define arch_phys_wc_add arch_phys_wc_add
+ #endif
+ 
++#ifdef CONFIG_X86_PAT
++extern int arch_io_reserve_memtype_wc(resource_size_t start, resource_size_t size);
++extern void arch_io_free_memtype_wc(resource_size_t start, resource_size_t size);
++#define arch_io_reserve_memtype_wc arch_io_reserve_memtype_wc
++#endif
++
+ #endif /* _ASM_X86_IO_H */
+diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
+index 1007fa80f5a6..0e1dd7d47f05 100644
+--- a/arch/x86/mm/pageattr.c
++++ b/arch/x86/mm/pageattr.c
+@@ -1079,7 +1079,7 @@ static int populate_pud(struct cpa_data *cpa, unsigned long start, pgd_t *pgd,
+ 	 * Map everything starting from the Gb boundary, possibly with 1G pages
+ 	 */
+ 	while (end - start >= PUD_SIZE) {
+-		set_pud(pud, pud_mkhuge(pfn_pud(cpa->pfn,
++		set_pud(pud, pud_mkhuge(pfn_pud(cpa->pfn >> PAGE_SHIFT,
+ 				   canon_pgprot(pud_pgprot))));
+ 
+ 		start	  += PUD_SIZE;
+diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
+index 3146b1da6d72..5ff0cb74de55 100644
+--- a/arch/x86/mm/pat.c
++++ b/arch/x86/mm/pat.c
+@@ -726,6 +726,20 @@ void io_free_memtype(resource_size_t start, resource_size_t end)
+ 	free_memtype(start, end);
+ }
+ 
++int arch_io_reserve_memtype_wc(resource_size_t start, resource_size_t size)
++{
++	enum page_cache_mode type = _PAGE_CACHE_MODE_WC;
++
++	return io_reserve_memtype(start, start + size, &type);
++}
++EXPORT_SYMBOL(arch_io_reserve_memtype_wc);
++
++void arch_io_free_memtype_wc(resource_size_t start, resource_size_t size)
++{
++	io_free_memtype(start, start + size);
++}
++EXPORT_SYMBOL(arch_io_free_memtype_wc);
++
+ pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
+ 				unsigned long size, pgprot_t vma_prot)
+ {
+diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+index 73628c7599e7..3aca9a9011fb 100644
+--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
++++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+@@ -492,6 +492,10 @@ void amdgpu_bo_force_delete(struct amdgpu_device *adev)
+ 
+ int amdgpu_bo_init(struct amdgpu_device *adev)
+ {
++	/* reserve PAT memory space to WC for VRAM */
++	arch_io_reserve_memtype_wc(adev->mc.aper_base,
++				   adev->mc.aper_size);
++
+ 	/* Add an MTRR for the VRAM */
+ 	adev->mc.vram_mtrr = arch_phys_wc_add(adev->mc.aper_base,
+ 					      adev->mc.aper_size);
+@@ -507,6 +511,7 @@ void amdgpu_bo_fini(struct amdgpu_device *adev)
+ {
+ 	amdgpu_ttm_fini(adev);
+ 	arch_phys_wc_del(adev->mc.vram_mtrr);
++	arch_io_free_memtype_wc(adev->mc.aper_base, adev->mc.aper_size);
+ }
+ 
+ int amdgpu_bo_fbdev_mmap(struct amdgpu_bo *bo,
+diff --git a/drivers/gpu/drm/ast/ast_ttm.c b/drivers/gpu/drm/ast/ast_ttm.c
+index 08f82eae6939..ac12f74e6b32 100644
+--- a/drivers/gpu/drm/ast/ast_ttm.c
++++ b/drivers/gpu/drm/ast/ast_ttm.c
+@@ -275,6 +275,8 @@ int ast_mm_init(struct ast_private *ast)
+ 		return ret;
+ 	}
+ 
++	arch_io_reserve_memtype_wc(pci_resource_start(dev->pdev, 0),
++				   pci_resource_len(dev->pdev, 0));
+ 	ast->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
+ 					pci_resource_len(dev->pdev, 0));
+ 
+@@ -283,11 +285,15 @@ int ast_mm_init(struct ast_private *ast)
+ 
+ void ast_mm_fini(struct ast_private *ast)
+ {
++	struct drm_device *dev = ast->dev;
++
+ 	ttm_bo_device_release(&ast->ttm.bdev);
+ 
+ 	ast_ttm_global_release(ast);
+ 
+ 	arch_phys_wc_del(ast->fb_mtrr);
++	arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0),
++				pci_resource_len(dev->pdev, 0));
+ }
+ 
+ void ast_ttm_placement(struct ast_bo *bo, int domain)
+diff --git a/drivers/gpu/drm/cirrus/cirrus_ttm.c b/drivers/gpu/drm/cirrus/cirrus_ttm.c
+index dfffd528517a..393967025043 100644
+--- a/drivers/gpu/drm/cirrus/cirrus_ttm.c
++++ b/drivers/gpu/drm/cirrus/cirrus_ttm.c
+@@ -275,6 +275,9 @@ int cirrus_mm_init(struct cirrus_device *cirrus)
+ 		return ret;
+ 	}
+ 
++	arch_io_reserve_memtype_wc(pci_resource_start(dev->pdev, 0),
++				   pci_resource_len(dev->pdev, 0));
++
+ 	cirrus->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
+ 					   pci_resource_len(dev->pdev, 0));
+ 
+@@ -284,6 +287,8 @@ int cirrus_mm_init(struct cirrus_device *cirrus)
+ 
+ void cirrus_mm_fini(struct cirrus_device *cirrus)
+ {
++	struct drm_device *dev = cirrus->dev;
++
+ 	if (!cirrus->mm_inited)
+ 		return;
+ 
+@@ -293,6 +298,8 @@ void cirrus_mm_fini(struct cirrus_device *cirrus)
+ 
+ 	arch_phys_wc_del(cirrus->fb_mtrr);
+ 	cirrus->fb_mtrr = 0;
++	arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0),
++				pci_resource_len(dev->pdev, 0));
+ }
+ 
+ void cirrus_ttm_placement(struct cirrus_bo *bo, int domain)
+diff --git a/drivers/gpu/drm/i915/i915_gem_userptr.c b/drivers/gpu/drm/i915/i915_gem_userptr.c
+index 19fb0bddc1cd..359fe2b8bb8a 100644
+--- a/drivers/gpu/drm/i915/i915_gem_userptr.c
++++ b/drivers/gpu/drm/i915/i915_gem_userptr.c
+@@ -842,6 +842,9 @@ i915_gem_userptr_ioctl(struct drm_device *dev, void *data, struct drm_file *file
+ 			    I915_USERPTR_UNSYNCHRONIZED))
+ 		return -EINVAL;
+ 
++	if (!args->user_size)
++		return -EINVAL;
++
+ 	if (offset_in_page(args->user_ptr | args->user_size))
+ 		return -EINVAL;
+ 
+diff --git a/drivers/gpu/drm/mgag200/mgag200_ttm.c b/drivers/gpu/drm/mgag200/mgag200_ttm.c
+index 05108b505fbf..d9df8d32fc35 100644
+--- a/drivers/gpu/drm/mgag200/mgag200_ttm.c
++++ b/drivers/gpu/drm/mgag200/mgag200_ttm.c
+@@ -274,6 +274,9 @@ int mgag200_mm_init(struct mga_device *mdev)
+ 		return ret;
+ 	}
+ 
++	arch_io_reserve_memtype_wc(pci_resource_start(dev->pdev, 0),
++				   pci_resource_len(dev->pdev, 0));
++
+ 	mdev->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
+ 					 pci_resource_len(dev->pdev, 0));
+ 
+@@ -282,10 +285,14 @@ int mgag200_mm_init(struct mga_device *mdev)
+ 
+ void mgag200_mm_fini(struct mga_device *mdev)
+ {
++	struct drm_device *dev = mdev->dev;
++
+ 	ttm_bo_device_release(&mdev->ttm.bdev);
+ 
+ 	mgag200_ttm_global_release(mdev);
+ 
++	arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0),
++				pci_resource_len(dev->pdev, 0));
+ 	arch_phys_wc_del(mdev->fb_mtrr);
+ 	mdev->fb_mtrr = 0;
+ }
+diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c b/drivers/gpu/drm/nouveau/nouveau_ttm.c
+index d2e7d209f651..9835327a3214 100644
+--- a/drivers/gpu/drm/nouveau/nouveau_ttm.c
++++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c
+@@ -397,6 +397,9 @@ nouveau_ttm_init(struct nouveau_drm *drm)
+ 	/* VRAM init */
+ 	drm->gem.vram_available = drm->device.info.ram_user;
+ 
++	arch_io_reserve_memtype_wc(device->func->resource_addr(device, 1),
++				   device->func->resource_size(device, 1));
++
+ 	ret = ttm_bo_init_mm(&drm->ttm.bdev, TTM_PL_VRAM,
+ 			      drm->gem.vram_available >> PAGE_SHIFT);
+ 	if (ret) {
+@@ -429,6 +432,8 @@ nouveau_ttm_init(struct nouveau_drm *drm)
+ void
+ nouveau_ttm_fini(struct nouveau_drm *drm)
+ {
++	struct nvkm_device *device = nvxx_device(&drm->device);
++
+ 	ttm_bo_clean_mm(&drm->ttm.bdev, TTM_PL_VRAM);
+ 	ttm_bo_clean_mm(&drm->ttm.bdev, TTM_PL_TT);
+ 
+@@ -438,4 +443,7 @@ nouveau_ttm_fini(struct nouveau_drm *drm)
+ 
+ 	arch_phys_wc_del(drm->ttm.mtrr);
+ 	drm->ttm.mtrr = 0;
++	arch_io_free_memtype_wc(device->func->resource_addr(device, 1),
++				device->func->resource_size(device, 1));
++
+ }
+diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c
+index 83aee9e814ba..18ec38d0d3f5 100644
+--- a/drivers/gpu/drm/radeon/radeon_object.c
++++ b/drivers/gpu/drm/radeon/radeon_object.c
+@@ -447,6 +447,10 @@ void radeon_bo_force_delete(struct radeon_device *rdev)
+ 
+ int radeon_bo_init(struct radeon_device *rdev)
+ {
++	/* reserve PAT memory space to WC for VRAM */
++	arch_io_reserve_memtype_wc(rdev->mc.aper_base,
++				   rdev->mc.aper_size);
++
+ 	/* Add an MTRR for the VRAM */
+ 	if (!rdev->fastfb_working) {
+ 		rdev->mc.vram_mtrr = arch_phys_wc_add(rdev->mc.aper_base,
+@@ -464,6 +468,7 @@ void radeon_bo_fini(struct radeon_device *rdev)
+ {
+ 	radeon_ttm_fini(rdev);
+ 	arch_phys_wc_del(rdev->mc.vram_mtrr);
++	arch_io_free_memtype_wc(rdev->mc.aper_base, rdev->mc.aper_size);
+ }
+ 
+ /* Returns how many bytes TTM can move per IB.
+diff --git a/drivers/iio/frequency/ad9523.c b/drivers/iio/frequency/ad9523.c
+index 44a30f286de1..57b1812a5a18 100644
+--- a/drivers/iio/frequency/ad9523.c
++++ b/drivers/iio/frequency/ad9523.c
+@@ -507,7 +507,7 @@ static ssize_t ad9523_store(struct device *dev,
+ 		return ret;
+ 
+ 	if (!state)
+-		return 0;
++		return len;
+ 
+ 	mutex_lock(&indio_dev->mlock);
+ 	switch ((u32)this_attr->address) {
+@@ -641,7 +641,7 @@ static int ad9523_read_raw(struct iio_dev *indio_dev,
+ 		code = (AD9523_CLK_DIST_DIV_PHASE_REV(ret) * 3141592) /
+ 			AD9523_CLK_DIST_DIV_REV(ret);
+ 		*val = code / 1000000;
+-		*val2 = (code % 1000000) * 10;
++		*val2 = code % 1000000;
+ 		return IIO_VAL_INT_PLUS_MICRO;
+ 	default:
+ 		return -EINVAL;
+diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
+index e913a930ac80..5a63e32a4a6b 100644
+--- a/drivers/iommu/dmar.c
++++ b/drivers/iommu/dmar.c
+@@ -1315,8 +1315,8 @@ void qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
+ 	qi_submit_sync(&desc, iommu);
+ }
+ 
+-void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 qdep,
+-			u64 addr, unsigned mask)
++void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 pfsid,
++			u16 qdep, u64 addr, unsigned mask)
+ {
+ 	struct qi_desc desc;
+ 
+@@ -1331,7 +1331,7 @@ void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 qdep,
+ 		qdep = 0;
+ 
+ 	desc.low = QI_DEV_IOTLB_SID(sid) | QI_DEV_IOTLB_QDEP(qdep) |
+-		   QI_DIOTLB_TYPE;
++		   QI_DIOTLB_TYPE | QI_DEV_IOTLB_PFSID(pfsid);
+ 
+ 	qi_submit_sync(&desc, iommu);
+ }
+diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
+index 4efec2db4ee2..49b266433f4c 100644
+--- a/drivers/iommu/intel-iommu.c
++++ b/drivers/iommu/intel-iommu.c
+@@ -419,6 +419,7 @@ struct device_domain_info {
+ 	struct list_head global; /* link to global list */
+ 	u8 bus;			/* PCI bus number */
+ 	u8 devfn;		/* PCI devfn number */
++	u16 pfsid;		/* SRIOV physical function source ID */
+ 	u8 pasid_supported:3;
+ 	u8 pasid_enabled:1;
+ 	u8 pri_supported:1;
+@@ -1479,6 +1480,20 @@ static void iommu_enable_dev_iotlb(struct device_domain_info *info)
+ 		return;
+ 
+ 	pdev = to_pci_dev(info->dev);
++	/* For IOMMU that supports device IOTLB throttling (DIT), we assign
++	 * PFSID to the invalidation desc of a VF such that IOMMU HW can gauge
++	 * queue depth at PF level. If DIT is not set, PFSID will be treated as
++	 * reserved, which should be set to 0.
++	 */
++	if (!ecap_dit(info->iommu->ecap))
++		info->pfsid = 0;
++	else {
++		struct pci_dev *pf_pdev;
++
++		/* pdev will be returned if device is not a vf */
++		pf_pdev = pci_physfn(pdev);
++		info->pfsid = PCI_DEVID(pf_pdev->bus->number, pf_pdev->devfn);
++	}
+ 
+ #ifdef CONFIG_INTEL_IOMMU_SVM
+ 	/* The PCIe spec, in its wisdom, declares that the behaviour of
+@@ -1537,7 +1552,8 @@ static void iommu_flush_dev_iotlb(struct dmar_domain *domain,
+ 
+ 		sid = info->bus << 8 | info->devfn;
+ 		qdep = info->ats_qdep;
+-		qi_flush_dev_iotlb(info->iommu, sid, qdep, addr, mask);
++		qi_flush_dev_iotlb(info->iommu, sid, info->pfsid,
++				qdep, addr, mask);
+ 	}
+ 	spin_unlock_irqrestore(&device_domain_lock, flags);
+ }
+diff --git a/drivers/md/bcache/writeback.c b/drivers/md/bcache/writeback.c
+index f2c0000de613..95a6ae053714 100644
+--- a/drivers/md/bcache/writeback.c
++++ b/drivers/md/bcache/writeback.c
+@@ -462,8 +462,10 @@ static int bch_writeback_thread(void *arg)
+ 			 * data on cache. BCACHE_DEV_DETACHING flag is set in
+ 			 * bch_cached_dev_detach().
+ 			 */
+-			if (test_bit(BCACHE_DEV_DETACHING, &dc->disk.flags))
++			if (test_bit(BCACHE_DEV_DETACHING, &dc->disk.flags)) {
++				up_write(&dc->writeback_lock);
+ 				break;
++			}
+ 		}
+ 
+ 		up_write(&dc->writeback_lock);
+diff --git a/drivers/md/dm-cache-metadata.c b/drivers/md/dm-cache-metadata.c
+index d3c55d7754af..905badc6cb17 100644
+--- a/drivers/md/dm-cache-metadata.c
++++ b/drivers/md/dm-cache-metadata.c
+@@ -337,7 +337,7 @@ static int __write_initial_superblock(struct dm_cache_metadata *cmd)
+ 	disk_super->version = cpu_to_le32(MAX_CACHE_VERSION);
+ 	memset(disk_super->policy_name, 0, sizeof(disk_super->policy_name));
+ 	memset(disk_super->policy_version, 0, sizeof(disk_super->policy_version));
+-	disk_super->policy_hint_size = 0;
++	disk_super->policy_hint_size = cpu_to_le32(0);
+ 
+ 	__copy_sm_root(cmd, disk_super);
+ 
+@@ -652,6 +652,7 @@ static int __commit_transaction(struct dm_cache_metadata *cmd,
+ 	disk_super->policy_version[0] = cpu_to_le32(cmd->policy_version[0]);
+ 	disk_super->policy_version[1] = cpu_to_le32(cmd->policy_version[1]);
+ 	disk_super->policy_version[2] = cpu_to_le32(cmd->policy_version[2]);
++	disk_super->policy_hint_size = cpu_to_le32(cmd->policy_hint_size);
+ 
+ 	disk_super->read_hits = cpu_to_le32(cmd->stats.read_hits);
+ 	disk_super->read_misses = cpu_to_le32(cmd->stats.read_misses);
+diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c
+index 5e047bfc0cc4..518e2dec2aa2 100644
+--- a/drivers/misc/vmw_balloon.c
++++ b/drivers/misc/vmw_balloon.c
+@@ -341,7 +341,13 @@ static bool vmballoon_send_start(struct vmballoon *b, unsigned long req_caps)
+ 		success = false;
+ 	}
+ 
+-	if (b->capabilities & VMW_BALLOON_BATCHED_2M_CMDS)
++	/*
++	 * 2MB pages are only supported with batching. If batching is for some
++	 * reason disabled, do not use 2MB pages, since otherwise the legacy
++	 * mechanism is used with 2MB pages, causing a failure.
++	 */
++	if ((b->capabilities & VMW_BALLOON_BATCHED_2M_CMDS) &&
++	    (b->capabilities & VMW_BALLOON_BATCHED_CMDS))
+ 		b->supported_page_sizes = 2;
+ 	else
+ 		b->supported_page_sizes = 1;
+@@ -450,7 +456,7 @@ static int vmballoon_send_lock_page(struct vmballoon *b, unsigned long pfn,
+ 
+ 	pfn32 = (u32)pfn;
+ 	if (pfn32 != pfn)
+-		return -1;
++		return -EINVAL;
+ 
+ 	STATS_INC(b->stats.lock[false]);
+ 
+@@ -460,7 +466,7 @@ static int vmballoon_send_lock_page(struct vmballoon *b, unsigned long pfn,
+ 
+ 	pr_debug("%s - ppn %lx, hv returns %ld\n", __func__, pfn, status);
+ 	STATS_INC(b->stats.lock_fail[false]);
+-	return 1;
++	return -EIO;
+ }
+ 
+ static int vmballoon_send_batched_lock(struct vmballoon *b,
+@@ -597,11 +603,12 @@ static int vmballoon_lock_page(struct vmballoon *b, unsigned int num_pages,
+ 
+ 	locked = vmballoon_send_lock_page(b, page_to_pfn(page), &hv_status,
+ 								target);
+-	if (locked > 0) {
++	if (locked) {
+ 		STATS_INC(b->stats.refused_alloc[false]);
+ 
+-		if (hv_status == VMW_BALLOON_ERROR_RESET ||
+-				hv_status == VMW_BALLOON_ERROR_PPN_NOTNEEDED) {
++		if (locked == -EIO &&
++		    (hv_status == VMW_BALLOON_ERROR_RESET ||
++		     hv_status == VMW_BALLOON_ERROR_PPN_NOTNEEDED)) {
+ 			vmballoon_free_page(page, false);
+ 			return -EIO;
+ 		}
+@@ -617,7 +624,7 @@ static int vmballoon_lock_page(struct vmballoon *b, unsigned int num_pages,
+ 		} else {
+ 			vmballoon_free_page(page, false);
+ 		}
+-		return -EIO;
++		return locked;
+ 	}
+ 
+ 	/* track allocated page */
+@@ -1029,29 +1036,30 @@ static void vmballoon_vmci_cleanup(struct vmballoon *b)
+  */
+ static int vmballoon_vmci_init(struct vmballoon *b)
+ {
+-	int error = 0;
++	unsigned long error, dummy;
+ 
+-	if ((b->capabilities & VMW_BALLOON_SIGNALLED_WAKEUP_CMD) != 0) {
+-		error = vmci_doorbell_create(&b->vmci_doorbell,
+-				VMCI_FLAG_DELAYED_CB,
+-				VMCI_PRIVILEGE_FLAG_RESTRICTED,
+-				vmballoon_doorbell, b);
+-
+-		if (error == VMCI_SUCCESS) {
+-			VMWARE_BALLOON_CMD(VMCI_DOORBELL_SET,
+-					b->vmci_doorbell.context,
+-					b->vmci_doorbell.resource, error);
+-			STATS_INC(b->stats.doorbell_set);
+-		}
+-	}
++	if ((b->capabilities & VMW_BALLOON_SIGNALLED_WAKEUP_CMD) == 0)
++		return 0;
+ 
+-	if (error != 0) {
+-		vmballoon_vmci_cleanup(b);
++	error = vmci_doorbell_create(&b->vmci_doorbell, VMCI_FLAG_DELAYED_CB,
++				     VMCI_PRIVILEGE_FLAG_RESTRICTED,
++				     vmballoon_doorbell, b);
+ 
+-		return -EIO;
+-	}
++	if (error != VMCI_SUCCESS)
++		goto fail;
++
++	error = VMWARE_BALLOON_CMD(VMCI_DOORBELL_SET, b->vmci_doorbell.context,
++				   b->vmci_doorbell.resource, dummy);
++
++	STATS_INC(b->stats.doorbell_set);
++
++	if (error != VMW_BALLOON_SUCCESS)
++		goto fail;
+ 
+ 	return 0;
++fail:
++	vmballoon_vmci_cleanup(b);
++	return -EIO;
+ }
+ 
+ /*
+@@ -1289,7 +1297,14 @@ static int __init vmballoon_init(void)
+ 
+ 	return 0;
+ }
+-module_init(vmballoon_init);
++
++/*
++ * Using late_initcall() instead of module_init() allows the balloon to use the
++ * VMCI doorbell even when the balloon is built into the kernel. Otherwise the
++ * VMCI is probed only after the balloon is initialized. If the balloon is used
++ * as a module, late_initcall() is equivalent to module_init().
++ */
++late_initcall(vmballoon_init);
+ 
+ static void __exit vmballoon_exit(void)
+ {
+diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
+index acec4b565511..1aede726052c 100644
+--- a/drivers/net/usb/lan78xx.c
++++ b/drivers/net/usb/lan78xx.c
+@@ -902,6 +902,8 @@ static int lan78xx_link_reset(struct lan78xx_net *dev)
+ 
+ 		ret = lan78xx_update_flowcontrol(dev, ecmd.duplex, ladv, radv);
+ 		netif_carrier_on(dev->net);
++
++		tasklet_schedule(&dev->bh);
+ 	}
+ 
+ 	return ret;
+@@ -1361,8 +1363,6 @@ static void lan78xx_init_mac_address(struct lan78xx_net *dev)
+ 			netif_dbg(dev, ifup, dev->net,
+ 				  "MAC address set to random addr");
+ 		}
+-
+-		tasklet_schedule(&dev->bh);
+ 	}
+ 
+ 	ret = lan78xx_write_reg(dev, MAF_LO(0), addr_lo);
+diff --git a/drivers/pwm/pwm-tiehrpwm.c b/drivers/pwm/pwm-tiehrpwm.c
+index 6a41e66015b6..062dff1c902d 100644
+--- a/drivers/pwm/pwm-tiehrpwm.c
++++ b/drivers/pwm/pwm-tiehrpwm.c
+@@ -384,6 +384,8 @@ static void ehrpwm_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
+ 		aqcsfrc_mask = AQCSFRC_CSFA_MASK;
+ 	}
+ 
++	/* Update shadow register first before modifying active register */
++	ehrpwm_modify(pc->mmio_base, AQCSFRC, aqcsfrc_mask, aqcsfrc_val);
+ 	/*
+ 	 * Changes to immediate action on Action Qualifier. This puts
+ 	 * Action Qualifier control on PWM output from next TBCLK
+diff --git a/drivers/spi/spi-davinci.c b/drivers/spi/spi-davinci.c
+index c872a2e54c4b..2603bee2ce07 100644
+--- a/drivers/spi/spi-davinci.c
++++ b/drivers/spi/spi-davinci.c
+@@ -220,7 +220,7 @@ static void davinci_spi_chipselect(struct spi_device *spi, int value)
+ 	pdata = &dspi->pdata;
+ 
+ 	/* program delay transfers if tx_delay is non zero */
+-	if (spicfg->wdelay)
++	if (spicfg && spicfg->wdelay)
+ 		spidat1 |= SPIDAT1_WDEL;
+ 
+ 	/*
+diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
+index 0705d8883ede..8a29ec5992fd 100644
+--- a/drivers/video/fbdev/core/fbmem.c
++++ b/drivers/video/fbdev/core/fbmem.c
+@@ -1687,12 +1687,12 @@ static int do_register_framebuffer(struct fb_info *fb_info)
+ 	return 0;
+ }
+ 
+-static int do_unregister_framebuffer(struct fb_info *fb_info)
++static int unbind_console(struct fb_info *fb_info)
+ {
+ 	struct fb_event event;
+-	int i, ret = 0;
++	int ret;
++	int i = fb_info->node;
+ 
+-	i = fb_info->node;
+ 	if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)
+ 		return -EINVAL;
+ 
+@@ -1707,17 +1707,29 @@ static int do_unregister_framebuffer(struct fb_info *fb_info)
+ 	unlock_fb_info(fb_info);
+ 	console_unlock();
+ 
++	return ret;
++}
++
++static int __unlink_framebuffer(struct fb_info *fb_info);
++
++static int do_unregister_framebuffer(struct fb_info *fb_info)
++{
++	struct fb_event event;
++	int ret;
++
++	ret = unbind_console(fb_info);
++
+ 	if (ret)
+ 		return -EINVAL;
+ 
+ 	pm_vt_switch_unregister(fb_info->dev);
+ 
+-	unlink_framebuffer(fb_info);
++	__unlink_framebuffer(fb_info);
+ 	if (fb_info->pixmap.addr &&
+ 	    (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
+ 		kfree(fb_info->pixmap.addr);
+ 	fb_destroy_modelist(&fb_info->modelist);
+-	registered_fb[i] = NULL;
++	registered_fb[fb_info->node] = NULL;
+ 	num_registered_fb--;
+ 	fb_cleanup_device(fb_info);
+ 	event.info = fb_info;
+@@ -1730,7 +1742,7 @@ static int do_unregister_framebuffer(struct fb_info *fb_info)
+ 	return 0;
+ }
+ 
+-int unlink_framebuffer(struct fb_info *fb_info)
++static int __unlink_framebuffer(struct fb_info *fb_info)
+ {
+ 	int i;
+ 
+@@ -1742,6 +1754,20 @@ int unlink_framebuffer(struct fb_info *fb_info)
+ 		device_destroy(fb_class, MKDEV(FB_MAJOR, i));
+ 		fb_info->dev = NULL;
+ 	}
++
++	return 0;
++}
++
++int unlink_framebuffer(struct fb_info *fb_info)
++{
++	int ret;
++
++	ret = __unlink_framebuffer(fb_info);
++	if (ret)
++		return ret;
++
++	unbind_console(fb_info);
++
+ 	return 0;
+ }
+ EXPORT_SYMBOL(unlink_framebuffer);
+diff --git a/fs/9p/xattr.c b/fs/9p/xattr.c
+index e3d026ac382e..f35168ce426b 100644
+--- a/fs/9p/xattr.c
++++ b/fs/9p/xattr.c
+@@ -107,7 +107,7 @@ int v9fs_fid_xattr_set(struct p9_fid *fid, const char *name,
+ {
+ 	struct kvec kvec = {.iov_base = (void *)value, .iov_len = value_len};
+ 	struct iov_iter from;
+-	int retval;
++	int retval, err;
+ 
+ 	iov_iter_kvec(&from, WRITE | ITER_KVEC, &kvec, 1, value_len);
+ 
+@@ -128,7 +128,9 @@ int v9fs_fid_xattr_set(struct p9_fid *fid, const char *name,
+ 			 retval);
+ 	else
+ 		p9_client_write(fid, 0, &from, &retval);
+-	p9_client_clunk(fid);
++	err = p9_client_clunk(fid);
++	if (!retval && err)
++		retval = err;
+ 	return retval;
+ }
+ 
+diff --git a/fs/nfs/blocklayout/dev.c b/fs/nfs/blocklayout/dev.c
+index a861bbdfe577..fa8b484d035d 100644
+--- a/fs/nfs/blocklayout/dev.c
++++ b/fs/nfs/blocklayout/dev.c
+@@ -162,7 +162,7 @@ static bool bl_map_stripe(struct pnfs_block_dev *dev, u64 offset,
+ 	chunk = div_u64(offset, dev->chunk_size);
+ 	div_u64_rem(chunk, dev->nr_children, &chunk_idx);
+ 
+-	if (chunk_idx > dev->nr_children) {
++	if (chunk_idx >= dev->nr_children) {
+ 		dprintk("%s: invalid chunk idx %d (%lld/%lld)\n",
+ 			__func__, chunk_idx, offset, dev->chunk_size);
+ 		/* error, should not happen */
+diff --git a/fs/quota/quota.c b/fs/quota/quota.c
+index 3746367098fd..bb0d643481c8 100644
+--- a/fs/quota/quota.c
++++ b/fs/quota/quota.c
+@@ -17,6 +17,7 @@
+ #include <linux/quotaops.h>
+ #include <linux/types.h>
+ #include <linux/writeback.h>
++#include <linux/nospec.h>
+ 
+ static int check_quotactl_permission(struct super_block *sb, int type, int cmd,
+ 				     qid_t id)
+@@ -644,6 +645,7 @@ static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id,
+ 
+ 	if (type >= (XQM_COMMAND(cmd) ? XQM_MAXQUOTAS : MAXQUOTAS))
+ 		return -EINVAL;
++	type = array_index_nospec(type, MAXQUOTAS);
+ 	/*
+ 	 * Quota not supported on this fs? Check this before s_quota_types
+ 	 * since they needn't be set if quota is not supported at all.
+diff --git a/fs/ubifs/journal.c b/fs/ubifs/journal.c
+index 22dba8837a86..539fa934ed93 100644
+--- a/fs/ubifs/journal.c
++++ b/fs/ubifs/journal.c
+@@ -661,6 +661,11 @@ int ubifs_jnl_update(struct ubifs_info *c, const struct inode *dir,
+ 	spin_lock(&ui->ui_lock);
+ 	ui->synced_i_size = ui->ui_size;
+ 	spin_unlock(&ui->ui_lock);
++	if (xent) {
++		spin_lock(&host_ui->ui_lock);
++		host_ui->synced_i_size = host_ui->ui_size;
++		spin_unlock(&host_ui->ui_lock);
++	}
+ 	mark_inode_clean(c, ui);
+ 	mark_inode_clean(c, host_ui);
+ 	return 0;
+@@ -1107,7 +1112,7 @@ static int recomp_data_node(const struct ubifs_info *c,
+ 	int err, len, compr_type, out_len;
+ 
+ 	out_len = le32_to_cpu(dn->size);
+-	buf = kmalloc_array(out_len, WORST_COMPR_FACTOR, GFP_NOFS);
++	buf = kmalloc(out_len * WORST_COMPR_FACTOR, GFP_NOFS);
+ 	if (!buf)
+ 		return -ENOMEM;
+ 
+@@ -1186,7 +1191,16 @@ int ubifs_jnl_truncate(struct ubifs_info *c, const struct inode *inode,
+ 		else if (err)
+ 			goto out_free;
+ 		else {
+-			if (le32_to_cpu(dn->size) <= dlen)
++			int dn_len = le32_to_cpu(dn->size);
++
++			if (dn_len <= 0 || dn_len > UBIFS_BLOCK_SIZE) {
++				ubifs_err(c, "bad data node (block %u, inode %lu)",
++					  blk, inode->i_ino);
++				ubifs_dump_node(c, dn);
++				goto out_free;
++			}
++
++			if (dn_len <= dlen)
+ 				dlen = 0; /* Nothing to do */
+ 			else {
+ 				int compr_type = le16_to_cpu(dn->compr_type);
+diff --git a/fs/ubifs/lprops.c b/fs/ubifs/lprops.c
+index a0011aa3a779..f43f162e36f4 100644
+--- a/fs/ubifs/lprops.c
++++ b/fs/ubifs/lprops.c
+@@ -1091,10 +1091,6 @@ static int scan_check_cb(struct ubifs_info *c,
+ 		}
+ 	}
+ 
+-	buf = __vmalloc(c->leb_size, GFP_NOFS, PAGE_KERNEL);
+-	if (!buf)
+-		return -ENOMEM;
+-
+ 	/*
+ 	 * After an unclean unmount, empty and freeable LEBs
+ 	 * may contain garbage - do not scan them.
+@@ -1113,6 +1109,10 @@ static int scan_check_cb(struct ubifs_info *c,
+ 		return LPT_SCAN_CONTINUE;
+ 	}
+ 
++	buf = __vmalloc(c->leb_size, GFP_NOFS, PAGE_KERNEL);
++	if (!buf)
++		return -ENOMEM;
++
+ 	sleb = ubifs_scan(c, lnum, 0, buf, 0);
+ 	if (IS_ERR(sleb)) {
+ 		ret = PTR_ERR(sleb);
+diff --git a/fs/xattr.c b/fs/xattr.c
+index 76f01bf4b048..09441c396798 100644
+--- a/fs/xattr.c
++++ b/fs/xattr.c
+@@ -453,7 +453,7 @@ getxattr(struct dentry *d, const char __user *name, void __user *value,
+ 	if (error > 0) {
+ 		if ((strcmp(kname, XATTR_NAME_POSIX_ACL_ACCESS) == 0) ||
+ 		    (strcmp(kname, XATTR_NAME_POSIX_ACL_DEFAULT) == 0))
+-			posix_acl_fix_xattr_to_user(kvalue, size);
++			posix_acl_fix_xattr_to_user(kvalue, error);
+ 		if (size && copy_to_user(value, kvalue, error))
+ 			error = -EFAULT;
+ 	} else if (error == -ERANGE && size >= XATTR_SIZE_MAX) {
+diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
+index 23e129ef6726..e353f6600b0b 100644
+--- a/include/linux/intel-iommu.h
++++ b/include/linux/intel-iommu.h
+@@ -125,6 +125,7 @@ static inline void dmar_writeq(void __iomem *addr, u64 val)
+  * Extended Capability Register
+  */
+ 
++#define ecap_dit(e)		((e >> 41) & 0x1)
+ #define ecap_pasid(e)		((e >> 40) & 0x1)
+ #define ecap_pss(e)		((e >> 35) & 0x1f)
+ #define ecap_eafs(e)		((e >> 34) & 0x1)
+@@ -294,6 +295,7 @@ enum {
+ #define QI_DEV_IOTLB_SID(sid)	((u64)((sid) & 0xffff) << 32)
+ #define QI_DEV_IOTLB_QDEP(qdep)	(((qdep) & 0x1f) << 16)
+ #define QI_DEV_IOTLB_ADDR(addr)	((u64)(addr) & VTD_PAGE_MASK)
++#define QI_DEV_IOTLB_PFSID(pfsid) (((u64)(pfsid & 0xf) << 12) | ((u64)(pfsid & 0xfff) << 52))
+ #define QI_DEV_IOTLB_SIZE	1
+ #define QI_DEV_IOTLB_MAX_INVS	32
+ 
+@@ -318,6 +320,7 @@ enum {
+ #define QI_DEV_EIOTLB_PASID(p)	(((u64)p) << 32)
+ #define QI_DEV_EIOTLB_SID(sid)	((u64)((sid) & 0xffff) << 16)
+ #define QI_DEV_EIOTLB_QDEP(qd)	((u64)((qd) & 0x1f) << 4)
++#define QI_DEV_EIOTLB_PFSID(pfsid) (((u64)(pfsid & 0xf) << 12) | ((u64)(pfsid & 0xfff) << 52))
+ #define QI_DEV_EIOTLB_MAX_INVS	32
+ 
+ #define QI_PGRP_IDX(idx)	(((u64)(idx)) << 55)
+@@ -463,9 +466,8 @@ extern void qi_flush_context(struct intel_iommu *iommu, u16 did, u16 sid,
+ 			     u8 fm, u64 type);
+ extern void qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
+ 			  unsigned int size_order, u64 type);
+-extern void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 qdep,
+-			       u64 addr, unsigned mask);
+-
++extern void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 pfsid,
++			u16 qdep, u64 addr, unsigned mask);
+ extern int qi_submit_sync(struct qi_desc *desc, struct intel_iommu *iommu);
+ 
+ extern int dmar_ir_support(void);
+diff --git a/include/linux/io.h b/include/linux/io.h
+index de64c1e53612..8ab45611fc35 100644
+--- a/include/linux/io.h
++++ b/include/linux/io.h
+@@ -154,4 +154,26 @@ enum {
+ void *memremap(resource_size_t offset, size_t size, unsigned long flags);
+ void memunmap(void *addr);
+ 
++/*
++ * On x86 PAT systems we have memory tracking that keeps track of
++ * the allowed mappings on memory ranges. This tracking works for
++ * all the in-kernel mapping APIs (ioremap*), but where the user
++ * wishes to map a range from a physical device into user memory
++ * the tracking won't be updated. This API is to be used by
++ * drivers which remap physical device pages into userspace,
++ * and wants to make sure they are mapped WC and not UC.
++ */
++#ifndef arch_io_reserve_memtype_wc
++static inline int arch_io_reserve_memtype_wc(resource_size_t base,
++					     resource_size_t size)
++{
++	return 0;
++}
++
++static inline void arch_io_free_memtype_wc(resource_size_t base,
++					   resource_size_t size)
++{
++}
++#endif
++
+ #endif /* _LINUX_IO_H */
+diff --git a/include/video/udlfb.h b/include/video/udlfb.h
+index f9466fa54ba4..2ad9a6d37ff4 100644
+--- a/include/video/udlfb.h
++++ b/include/video/udlfb.h
+@@ -87,7 +87,7 @@ struct dlfb_data {
+ #define MIN_RAW_PIX_BYTES	2
+ #define MIN_RAW_CMD_BYTES	(RAW_HEADER_BYTES + MIN_RAW_PIX_BYTES)
+ 
+-#define DL_DEFIO_WRITE_DELAY    5 /* fb_deferred_io.delay in jiffies */
++#define DL_DEFIO_WRITE_DELAY    msecs_to_jiffies(HZ <= 300 ? 4 : 10) /* optimal value for 720p video */
+ #define DL_DEFIO_WRITE_DISABLE  (HZ*60) /* "disable" with long delay */
+ 
+ /* remove these once align.h patch is taken into kernel */
+diff --git a/kernel/kthread.c b/kernel/kthread.c
+index 850b255649a2..ac6849ee3057 100644
+--- a/kernel/kthread.c
++++ b/kernel/kthread.c
+@@ -313,10 +313,16 @@ struct task_struct *kthread_create_on_node(int (*threadfn)(void *data),
+ 	task = create->result;
+ 	if (!IS_ERR(task)) {
+ 		static const struct sched_param param = { .sched_priority = 0 };
++		char name[TASK_COMM_LEN];
+ 		va_list args;
+ 
+ 		va_start(args, namefmt);
+-		vsnprintf(task->comm, sizeof(task->comm), namefmt, args);
++		/*
++		 * task is already visible to other tasks, so updating
++		 * COMM must be protected.
++		 */
++		vsnprintf(name, sizeof(name), namefmt, args);
++		set_task_comm(task, name);
+ 		va_end(args);
+ 		/*
+ 		 * root may have changed our (kthreadd's) priority or CPU mask.
+diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
+index 02e8dfaa1ce2..9d76184279fe 100644
+--- a/kernel/power/Kconfig
++++ b/kernel/power/Kconfig
+@@ -105,6 +105,7 @@ config PM_SLEEP
+ 	def_bool y
+ 	depends on SUSPEND || HIBERNATE_CALLBACKS
+ 	select PM
++	select SRCU
+ 
+ config PM_SLEEP_SMP
+ 	def_bool y
+diff --git a/kernel/sys.c b/kernel/sys.c
+index f718742e55e6..e2446ade79ba 100644
+--- a/kernel/sys.c
++++ b/kernel/sys.c
+@@ -1142,18 +1142,19 @@ static int override_release(char __user *release, size_t len)
+ 
+ SYSCALL_DEFINE1(newuname, struct new_utsname __user *, name)
+ {
+-	int errno = 0;
++	struct new_utsname tmp;
+ 
+ 	down_read(&uts_sem);
+-	if (copy_to_user(name, utsname(), sizeof *name))
+-		errno = -EFAULT;
++	memcpy(&tmp, utsname(), sizeof(tmp));
+ 	up_read(&uts_sem);
++	if (copy_to_user(name, &tmp, sizeof(tmp)))
++		return -EFAULT;
+ 
+-	if (!errno && override_release(name->release, sizeof(name->release)))
+-		errno = -EFAULT;
+-	if (!errno && override_architecture(name))
+-		errno = -EFAULT;
+-	return errno;
++	if (override_release(name->release, sizeof(name->release)))
++		return -EFAULT;
++	if (override_architecture(name))
++		return -EFAULT;
++	return 0;
+ }
+ 
+ #ifdef __ARCH_WANT_SYS_OLD_UNAME
+@@ -1162,55 +1163,46 @@ SYSCALL_DEFINE1(newuname, struct new_utsname __user *, name)
+  */
+ SYSCALL_DEFINE1(uname, struct old_utsname __user *, name)
+ {
+-	int error = 0;
++	struct old_utsname tmp;
+ 
+ 	if (!name)
+ 		return -EFAULT;
+ 
+ 	down_read(&uts_sem);
+-	if (copy_to_user(name, utsname(), sizeof(*name)))
+-		error = -EFAULT;
++	memcpy(&tmp, utsname(), sizeof(tmp));
+ 	up_read(&uts_sem);
++	if (copy_to_user(name, &tmp, sizeof(tmp)))
++		return -EFAULT;
+ 
+-	if (!error && override_release(name->release, sizeof(name->release)))
+-		error = -EFAULT;
+-	if (!error && override_architecture(name))
+-		error = -EFAULT;
+-	return error;
++	if (override_release(name->release, sizeof(name->release)))
++		return -EFAULT;
++	if (override_architecture(name))
++		return -EFAULT;
++	return 0;
+ }
+ 
+ SYSCALL_DEFINE1(olduname, struct oldold_utsname __user *, name)
+ {
+-	int error;
++	struct oldold_utsname tmp = {};
+ 
+ 	if (!name)
+ 		return -EFAULT;
+-	if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
+-		return -EFAULT;
+ 
+ 	down_read(&uts_sem);
+-	error = __copy_to_user(&name->sysname, &utsname()->sysname,
+-			       __OLD_UTS_LEN);
+-	error |= __put_user(0, name->sysname + __OLD_UTS_LEN);
+-	error |= __copy_to_user(&name->nodename, &utsname()->nodename,
+-				__OLD_UTS_LEN);
+-	error |= __put_user(0, name->nodename + __OLD_UTS_LEN);
+-	error |= __copy_to_user(&name->release, &utsname()->release,
+-				__OLD_UTS_LEN);
+-	error |= __put_user(0, name->release + __OLD_UTS_LEN);
+-	error |= __copy_to_user(&name->version, &utsname()->version,
+-				__OLD_UTS_LEN);
+-	error |= __put_user(0, name->version + __OLD_UTS_LEN);
+-	error |= __copy_to_user(&name->machine, &utsname()->machine,
+-				__OLD_UTS_LEN);
+-	error |= __put_user(0, name->machine + __OLD_UTS_LEN);
++	memcpy(&tmp.sysname, &utsname()->sysname, __OLD_UTS_LEN);
++	memcpy(&tmp.nodename, &utsname()->nodename, __OLD_UTS_LEN);
++	memcpy(&tmp.release, &utsname()->release, __OLD_UTS_LEN);
++	memcpy(&tmp.version, &utsname()->version, __OLD_UTS_LEN);
++	memcpy(&tmp.machine, &utsname()->machine, __OLD_UTS_LEN);
+ 	up_read(&uts_sem);
++	if (copy_to_user(name, &tmp, sizeof(tmp)))
++		return -EFAULT;
+ 
+-	if (!error && override_architecture(name))
+-		error = -EFAULT;
+-	if (!error && override_release(name->release, sizeof(name->release)))
+-		error = -EFAULT;
+-	return error ? -EFAULT : 0;
++	if (override_architecture(name))
++		return -EFAULT;
++	if (override_release(name->release, sizeof(name->release)))
++		return -EFAULT;
++	return 0;
+ }
+ #endif
+ 
+@@ -1224,17 +1216,18 @@ SYSCALL_DEFINE2(sethostname, char __user *, name, int, len)
+ 
+ 	if (len < 0 || len > __NEW_UTS_LEN)
+ 		return -EINVAL;
+-	down_write(&uts_sem);
+ 	errno = -EFAULT;
+ 	if (!copy_from_user(tmp, name, len)) {
+-		struct new_utsname *u = utsname();
++		struct new_utsname *u;
+ 
++		down_write(&uts_sem);
++		u = utsname();
+ 		memcpy(u->nodename, tmp, len);
+ 		memset(u->nodename + len, 0, sizeof(u->nodename) - len);
+ 		errno = 0;
+ 		uts_proc_notify(UTS_PROC_HOSTNAME);
++		up_write(&uts_sem);
+ 	}
+-	up_write(&uts_sem);
+ 	return errno;
+ }
+ 
+@@ -1242,8 +1235,9 @@ SYSCALL_DEFINE2(sethostname, char __user *, name, int, len)
+ 
+ SYSCALL_DEFINE2(gethostname, char __user *, name, int, len)
+ {
+-	int i, errno;
++	int i;
+ 	struct new_utsname *u;
++	char tmp[__NEW_UTS_LEN + 1];
+ 
+ 	if (len < 0)
+ 		return -EINVAL;
+@@ -1252,11 +1246,11 @@ SYSCALL_DEFINE2(gethostname, char __user *, name, int, len)
+ 	i = 1 + strlen(u->nodename);
+ 	if (i > len)
+ 		i = len;
+-	errno = 0;
+-	if (copy_to_user(name, u->nodename, i))
+-		errno = -EFAULT;
++	memcpy(tmp, u->nodename, i);
+ 	up_read(&uts_sem);
+-	return errno;
++	if (copy_to_user(name, tmp, i))
++		return -EFAULT;
++	return 0;
+ }
+ 
+ #endif
+@@ -1275,17 +1269,18 @@ SYSCALL_DEFINE2(setdomainname, char __user *, name, int, len)
+ 	if (len < 0 || len > __NEW_UTS_LEN)
+ 		return -EINVAL;
+ 
+-	down_write(&uts_sem);
+ 	errno = -EFAULT;
+ 	if (!copy_from_user(tmp, name, len)) {
+-		struct new_utsname *u = utsname();
++		struct new_utsname *u;
+ 
++		down_write(&uts_sem);
++		u = utsname();
+ 		memcpy(u->domainname, tmp, len);
+ 		memset(u->domainname + len, 0, sizeof(u->domainname) - len);
+ 		errno = 0;
+ 		uts_proc_notify(UTS_PROC_DOMAINNAME);
++		up_write(&uts_sem);
+ 	}
+-	up_write(&uts_sem);
+ 	return errno;
+ }
+ 
+diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
+index 7ab5eafea8b2..210b8e726a97 100644
+--- a/kernel/trace/blktrace.c
++++ b/kernel/trace/blktrace.c
+@@ -1716,6 +1716,10 @@ static ssize_t sysfs_blk_trace_attr_store(struct device *dev,
+ 	mutex_lock(&bdev->bd_mutex);
+ 
+ 	if (attr == &dev_attr_enable) {
++		if (!!value == !!q->blk_trace) {
++			ret = 0;
++			goto out_unlock_bdev;
++		}
+ 		if (value)
+ 			ret = blk_trace_setup_queue(q, bdev);
+ 		else
+diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
+index 11761b3dd7ba..e409ddce8754 100644
+--- a/kernel/trace/trace.c
++++ b/kernel/trace/trace.c
+@@ -6496,7 +6496,9 @@ rb_simple_write(struct file *filp, const char __user *ubuf,
+ 
+ 	if (buffer) {
+ 		mutex_lock(&trace_types_lock);
+-		if (val) {
++		if (!!val == tracer_tracing_is_on(tr)) {
++			val = 0; /* do nothing */
++		} else if (val) {
+ 			tracer_tracing_on(tr);
+ 			if (tr->current_trace->start)
+ 				tr->current_trace->start(tr);
+diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
+index 68bb89ad9d28..1dc887bab085 100644
+--- a/kernel/trace/trace_uprobe.c
++++ b/kernel/trace/trace_uprobe.c
+@@ -969,7 +969,7 @@ probe_event_disable(struct trace_uprobe *tu, struct trace_event_file *file)
+ 
+ 		list_del_rcu(&link->list);
+ 		/* synchronize with u{,ret}probe_trace_func */
+-		synchronize_sched();
++		synchronize_rcu();
+ 		kfree(link);
+ 
+ 		if (!list_empty(&tu->tp.files))
+diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c
+index 88fefa68c516..a965df4b54f5 100644
+--- a/kernel/user_namespace.c
++++ b/kernel/user_namespace.c
+@@ -602,9 +602,26 @@ static ssize_t map_write(struct file *file, const char __user *buf,
+ 	struct uid_gid_map new_map;
+ 	unsigned idx;
+ 	struct uid_gid_extent *extent = NULL;
+-	unsigned long page = 0;
++	unsigned long page;
+ 	char *kbuf, *pos, *next_line;
+-	ssize_t ret = -EINVAL;
++	ssize_t ret;
++
++	/* Only allow < page size writes at the beginning of the file */
++	if ((*ppos != 0) || (count >= PAGE_SIZE))
++		return -EINVAL;
++
++	/* Get a buffer */
++	page = __get_free_page(GFP_TEMPORARY);
++	kbuf = (char *) page;
++	if (!page)
++		return -ENOMEM;
++
++	/* Slurp in the user data */
++	if (copy_from_user(kbuf, buf, count)) {
++		free_page(page);
++		return -EFAULT;
++	}
++	kbuf[count] = '\0';
+ 
+ 	/*
+ 	 * The userns_state_mutex serializes all writes to any given map.
+@@ -638,24 +655,6 @@ static ssize_t map_write(struct file *file, const char __user *buf,
+ 	if (cap_valid(cap_setid) && !file_ns_capable(file, ns, CAP_SYS_ADMIN))
+ 		goto out;
+ 
+-	/* Get a buffer */
+-	ret = -ENOMEM;
+-	page = __get_free_page(GFP_TEMPORARY);
+-	kbuf = (char *) page;
+-	if (!page)
+-		goto out;
+-
+-	/* Only allow < page size writes at the beginning of the file */
+-	ret = -EINVAL;
+-	if ((*ppos != 0) || (count >= PAGE_SIZE))
+-		goto out;
+-
+-	/* Slurp in the user data */
+-	ret = -EFAULT;
+-	if (copy_from_user(kbuf, buf, count))
+-		goto out;
+-	kbuf[count] = '\0';
+-
+ 	/* Parse the user data */
+ 	ret = -EINVAL;
+ 	pos = kbuf;
+diff --git a/kernel/utsname_sysctl.c b/kernel/utsname_sysctl.c
+index c8eac43267e9..d2b3b2973456 100644
+--- a/kernel/utsname_sysctl.c
++++ b/kernel/utsname_sysctl.c
+@@ -17,7 +17,7 @@
+ 
+ #ifdef CONFIG_PROC_SYSCTL
+ 
+-static void *get_uts(struct ctl_table *table, int write)
++static void *get_uts(struct ctl_table *table)
+ {
+ 	char *which = table->data;
+ 	struct uts_namespace *uts_ns;
+@@ -25,21 +25,9 @@ static void *get_uts(struct ctl_table *table, int write)
+ 	uts_ns = current->nsproxy->uts_ns;
+ 	which = (which - (char *)&init_uts_ns) + (char *)uts_ns;
+ 
+-	if (!write)
+-		down_read(&uts_sem);
+-	else
+-		down_write(&uts_sem);
+ 	return which;
+ }
+ 
+-static void put_uts(struct ctl_table *table, int write, void *which)
+-{
+-	if (!write)
+-		up_read(&uts_sem);
+-	else
+-		up_write(&uts_sem);
+-}
+-
+ /*
+  *	Special case of dostring for the UTS structure. This has locks
+  *	to observe. Should this be in kernel/sys.c ????
+@@ -49,13 +37,34 @@ static int proc_do_uts_string(struct ctl_table *table, int write,
+ {
+ 	struct ctl_table uts_table;
+ 	int r;
++	char tmp_data[__NEW_UTS_LEN + 1];
++
+ 	memcpy(&uts_table, table, sizeof(uts_table));
+-	uts_table.data = get_uts(table, write);
++	uts_table.data = tmp_data;
++
++	/*
++	 * Buffer the value in tmp_data so that proc_dostring() can be called
++	 * without holding any locks.
++	 * We also need to read the original value in the write==1 case to
++	 * support partial writes.
++	 */
++	down_read(&uts_sem);
++	memcpy(tmp_data, get_uts(table), sizeof(tmp_data));
++	up_read(&uts_sem);
+ 	r = proc_dostring(&uts_table, write, buffer, lenp, ppos);
+-	put_uts(table, write, uts_table.data);
+ 
+-	if (write)
++	if (write) {
++		/*
++		 * Write back the new value.
++		 * Note that, since we dropped uts_sem, the result can
++		 * theoretically be incorrect if there are two parallel writes
++		 * at non-zero offsets to the same sysctl.
++		 */
++		down_write(&uts_sem);
++		memcpy(get_uts(table), tmp_data, sizeof(tmp_data));
++		up_write(&uts_sem);
+ 		proc_sys_poll_notify(table->poll);
++	}
+ 
+ 	return r;
+ }
+diff --git a/mm/memory.c b/mm/memory.c
+index 42db644f5ec4..5aee9ec8b8c6 100644
+--- a/mm/memory.c
++++ b/mm/memory.c
+@@ -361,15 +361,6 @@ void tlb_remove_table(struct mmu_gather *tlb, void *table)
+ {
+ 	struct mmu_table_batch **batch = &tlb->batch;
+ 
+-	/*
+-	 * When there's less then two users of this mm there cannot be a
+-	 * concurrent page-table walk.
+-	 */
+-	if (atomic_read(&tlb->mm->mm_users) < 2) {
+-		__tlb_remove_table(table);
+-		return;
+-	}
+-
+ 	if (*batch == NULL) {
+ 		*batch = (struct mmu_table_batch *)__get_free_page(GFP_NOWAIT | __GFP_NOWARN);
+ 		if (*batch == NULL) {
+diff --git a/net/9p/client.c b/net/9p/client.c
+index 3ff26eb1ea20..ed8738c4dc09 100644
+--- a/net/9p/client.c
++++ b/net/9p/client.c
+@@ -931,7 +931,7 @@ static int p9_client_version(struct p9_client *c)
+ {
+ 	int err = 0;
+ 	struct p9_req_t *req;
+-	char *version;
++	char *version = NULL;
+ 	int msize;
+ 
+ 	p9_debug(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n",
+diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
+index bced8c074c12..2f68ffda3715 100644
+--- a/net/9p/trans_fd.c
++++ b/net/9p/trans_fd.c
+@@ -185,6 +185,8 @@ static void p9_mux_poll_stop(struct p9_conn *m)
+ 	spin_lock_irqsave(&p9_poll_lock, flags);
+ 	list_del_init(&m->poll_pending_link);
+ 	spin_unlock_irqrestore(&p9_poll_lock, flags);
++
++	flush_work(&p9_poll_work);
+ }
+ 
+ /**
+@@ -933,7 +935,7 @@ p9_fd_create_tcp(struct p9_client *client, const char *addr, char *args)
+ 	if (err < 0)
+ 		return err;
+ 
+-	if (valid_ipaddr4(addr) < 0)
++	if (addr == NULL || valid_ipaddr4(addr) < 0)
+ 		return -EINVAL;
+ 
+ 	csocket = NULL;
+@@ -981,6 +983,9 @@ p9_fd_create_unix(struct p9_client *client, const char *addr, char *args)
+ 
+ 	csocket = NULL;
+ 
++	if (addr == NULL)
++		return -EINVAL;
++
+ 	if (strlen(addr) >= UNIX_PATH_MAX) {
+ 		pr_err("%s (%d): address too long: %s\n",
+ 		       __func__, task_pid_nr(current), addr);
+diff --git a/net/9p/trans_rdma.c b/net/9p/trans_rdma.c
+index 52b4a2f993f2..f42550dd3560 100644
+--- a/net/9p/trans_rdma.c
++++ b/net/9p/trans_rdma.c
+@@ -644,6 +644,9 @@ rdma_create_trans(struct p9_client *client, const char *addr, char *args)
+ 	struct ib_qp_init_attr qp_attr;
+ 	struct ib_cq_init_attr cq_attr = {};
+ 
++	if (addr == NULL)
++		return -EINVAL;
++
+ 	/* Parse the transport specific mount options */
+ 	err = parse_opts(args, &opts);
+ 	if (err < 0)
+diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c
+index 2ddeecca5b12..6018a1c0dc28 100644
+--- a/net/9p/trans_virtio.c
++++ b/net/9p/trans_virtio.c
+@@ -192,7 +192,7 @@ static int pack_sg_list(struct scatterlist *sg, int start,
+ 		s = rest_of_page(data);
+ 		if (s > count)
+ 			s = count;
+-		BUG_ON(index > limit);
++		BUG_ON(index >= limit);
+ 		/* Make sure we don't terminate early. */
+ 		sg_unmark_end(&sg[index]);
+ 		sg_set_buf(&sg[index++], data, s);
+@@ -237,6 +237,7 @@ pack_sg_list_p(struct scatterlist *sg, int start, int limit,
+ 		s = PAGE_SIZE - data_off;
+ 		if (s > count)
+ 			s = count;
++		BUG_ON(index >= limit);
+ 		/* Make sure we don't terminate early. */
+ 		sg_unmark_end(&sg[index]);
+ 		sg_set_page(&sg[index++], pdata[i++], s, data_off);
+@@ -409,6 +410,7 @@ p9_virtio_zc_request(struct p9_client *client, struct p9_req_t *req,
+ 	p9_debug(P9_DEBUG_TRANS, "virtio request\n");
+ 
+ 	if (uodata) {
++		__le32 sz;
+ 		int n = p9_get_mapped_pages(chan, &out_pages, uodata,
+ 					    outlen, &offs, &need_drop);
+ 		if (n < 0)
+@@ -419,6 +421,12 @@ p9_virtio_zc_request(struct p9_client *client, struct p9_req_t *req,
+ 			memcpy(&req->tc->sdata[req->tc->size - 4], &v, 4);
+ 			outlen = n;
+ 		}
++		/* The size field of the message must include the length of the
++		 * header and the length of the data.  We didn't actually know
++		 * the length of the data until this point so add it in now.
++		 */
++		sz = cpu_to_le32(req->tc->size + outlen);
++		memcpy(&req->tc->sdata[0], &sz, sizeof(sz));
+ 	} else if (uidata) {
+ 		int n = p9_get_mapped_pages(chan, &in_pages, uidata,
+ 					    inlen, &offs, &need_drop);
+@@ -646,6 +654,9 @@ p9_virtio_create(struct p9_client *client, const char *devname, char *args)
+ 	int ret = -ENOENT;
+ 	int found = 0;
+ 
++	if (devname == NULL)
++		return -EINVAL;
++
+ 	mutex_lock(&virtio_9p_lock);
+ 	list_for_each_entry(chan, &virtio_chan_list, chan_list) {
+ 		if (!strncmp(devname, chan->tag, chan->tag_len) &&
+diff --git a/net/ieee802154/6lowpan/tx.c b/net/ieee802154/6lowpan/tx.c
+index d4353faced35..a10db45b2e1e 100644
+--- a/net/ieee802154/6lowpan/tx.c
++++ b/net/ieee802154/6lowpan/tx.c
+@@ -265,9 +265,24 @@ netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *ldev)
+ 	/* We must take a copy of the skb before we modify/replace the ipv6
+ 	 * header as the header could be used elsewhere
+ 	 */
+-	skb = skb_unshare(skb, GFP_ATOMIC);
+-	if (!skb)
+-		return NET_XMIT_DROP;
++	if (unlikely(skb_headroom(skb) < ldev->needed_headroom ||
++		     skb_tailroom(skb) < ldev->needed_tailroom)) {
++		struct sk_buff *nskb;
++
++		nskb = skb_copy_expand(skb, ldev->needed_headroom,
++				       ldev->needed_tailroom, GFP_ATOMIC);
++		if (likely(nskb)) {
++			consume_skb(skb);
++			skb = nskb;
++		} else {
++			kfree_skb(skb);
++			return NET_XMIT_DROP;
++		}
++	} else {
++		skb = skb_unshare(skb, GFP_ATOMIC);
++		if (!skb)
++			return NET_XMIT_DROP;
++	}
+ 
+ 	ret = lowpan_header(skb, ldev, &dgram_size, &dgram_offset);
+ 	if (ret < 0) {
+diff --git a/net/mac802154/tx.c b/net/mac802154/tx.c
+index 3827f359b336..9e1ff9d4cf2d 100644
+--- a/net/mac802154/tx.c
++++ b/net/mac802154/tx.c
+@@ -72,8 +72,21 @@ ieee802154_tx(struct ieee802154_local *local, struct sk_buff *skb)
+ 	int ret;
+ 
+ 	if (!(local->hw.flags & IEEE802154_HW_TX_OMIT_CKSUM)) {
+-		u16 crc = crc_ccitt(0, skb->data, skb->len);
++		struct sk_buff *nskb;
++		u16 crc;
++
++		if (unlikely(skb_tailroom(skb) < IEEE802154_FCS_LEN)) {
++			nskb = skb_copy_expand(skb, 0, IEEE802154_FCS_LEN,
++					       GFP_ATOMIC);
++			if (likely(nskb)) {
++				consume_skb(skb);
++				skb = nskb;
++			} else {
++				goto err_tx;
++			}
++		}
+ 
++		crc = crc_ccitt(0, skb->data, skb->len);
+ 		put_unaligned_le16(crc, skb_put(skb, 2));
+ 	}
+ 
+diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c
+index 7f10430af39c..58426e7d320d 100644
+--- a/tools/perf/util/auxtrace.c
++++ b/tools/perf/util/auxtrace.c
+@@ -186,6 +186,9 @@ static int auxtrace_queues__grow(struct auxtrace_queues *queues,
+ 	for (i = 0; i < queues->nr_queues; i++) {
+ 		list_splice_tail(&queues->queue_array[i].head,
+ 				 &queue_array[i].head);
++		queue_array[i].tid = queues->queue_array[i].tid;
++		queue_array[i].cpu = queues->queue_array[i].cpu;
++		queue_array[i].set = queues->queue_array[i].set;
+ 		queue_array[i].priv = queues->queue_array[i].priv;
+ 	}
+