Merge branch 'akpm' (patchbomb from Andrew) into next

Merge misc updates from Andrew Morton: - a few fixes for 3.16. Cc'ed to stable so they'll get there somehow. - various misc fixes and cleanups - most of the ocfs2 queue. Review is slow... - most of MM. The MM queue is pretty huge this time, but not much in the way of feature work. - some tweaks under kernel/ - printk maintenance work - updates to lib/ - checkpatch updates - tweaks to init/ * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (276 commits) fs/autofs4/dev-ioctl.c: add __init to autofs_dev_ioctl_init fs/ncpfs/getopt.c: replace simple_strtoul by kstrtoul init/main.c: remove an ifdef kthreads: kill CLONE_KERNEL, change kernel_thread(kernel_init) to avoid CLONE_SIGHAND init/main.c: add initcall_blacklist kernel parameter init/main.c: don't use pr_debug() fs/binfmt_flat.c: make old_reloc() static fs/binfmt_elf.c: fix bool assignements fs/efs: convert printk(KERN_DEBUG to pr_debug fs/efs: add pr_fmt / use __func__ fs/efs: convert printk to pr_foo() scripts/checkpatch.pl: device_initcall is not the only __initcall substitute checkpatch: check stable email address checkpatch: warn on unnecessary void function return statements checkpatch: prefer kstrto<foo> to sscanf(buf, "%<lhuidx>", &bar); checkpatch: add warning for kmalloc/kzalloc with multiply checkpatch: warn on #defines ending in semicolon checkpatch: make --strict a default for files in drivers/net and net/ checkpatch: always warn on missing blank line after variable declaration block checkpatch: fix wildcard DT compatible string checking ...
2014-06-04 16:55:13 -07:00
parent d09cc3659d 3ff6db3287
commit 00170fdd08
279 changed files with 4720 additions and 3522 deletions
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1588,6 +1588,7 @@ static inline bool blk_integrity_is_initialized(struct gendisk *g)
 struct block_device_operations {
 	int (*open) (struct block_device *, fmode_t);
 	void (*release) (struct gendisk *, fmode_t);
+	int (*rw_page)(struct block_device *, sector_t, struct page *, int rw);
 	int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
 	int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
 	int (*direct_access) (struct block_device *, sector_t,
@@ -1606,7 +1607,13 @@ struct block_device_operations {

 extern int __blkdev_driver_ioctl(struct block_device *, fmode_t, unsigned int,
 				 unsigned long);
+extern int bdev_read_page(struct block_device *, sector_t, struct page *);
+extern int bdev_write_page(struct block_device *, sector_t, struct page *,
+						struct writeback_control *);
 #else /* CONFIG_BLOCK */
+
+struct block_device;
+
 /*
 * stubs for when the block layer is configured out
 */
@@ -1642,6 +1649,12 @@ static inline bool blk_needs_flush_plug(struct task_struct *tsk)
 	return false;
 }

+static inline int blkdev_issue_flush(struct block_device *bdev, gfp_t gfp_mask,
+				     sector_t *error_sector)
+{
+	return 0;
+}
+
 #endif /* CONFIG_BLOCK */

 #endif
--- a/include/linux/bootmem.h
+++ b/include/linux/bootmem.h
@@ -58,9 +58,9 @@ extern void free_bootmem_late(unsigned long physaddr, unsigned long size);
 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
 * the architecture-specific code should honor this).
 *
- * If flags is 0, then the return value is always 0 (success). If
- * flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the
- * memory already was reserved.
+ * If flags is BOOTMEM_DEFAULT, then the return value is always 0 (success).
+ * If flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the memory
+ * already was reserved.
 */
 #define BOOTMEM_DEFAULT		0
 #define BOOTMEM_EXCLUSIVE	(1<<0)
--- a/include/linux/buffer_head.h
+++ b/include/linux/buffer_head.h
@@ -207,8 +207,6 @@ void block_invalidatepage(struct page *page, unsigned int offset,
 			  unsigned int length);
 int block_write_full_page(struct page *page, get_block_t *get_block,
 				struct writeback_control *wbc);
-int block_write_full_page_endio(struct page *page, get_block_t *get_block,
-			struct writeback_control *wbc, bh_end_io_t *handler);
 int block_read_full_page(struct page*, get_block_t*);
 int block_is_partially_uptodate(struct page *page, unsigned long from,
 				unsigned long count);
--- a/include/linux/compaction.h
+++ b/include/linux/compaction.h
@@ -22,7 +22,7 @@ extern int sysctl_extfrag_handler(struct ctl_table *table, int write,
 extern int fragmentation_index(struct zone *zone, unsigned int order);
 extern unsigned long try_to_compact_pages(struct zonelist *zonelist,
 			int order, gfp_t gfp_mask, nodemask_t *mask,
-			bool sync, bool *contended);
+			enum migrate_mode mode, bool *contended);
 extern void compact_pgdat(pg_data_t *pgdat, int order);
 extern void reset_isolation_suitable(pg_data_t *pgdat);
 extern unsigned long compaction_suitable(struct zone *zone, int order);
@@ -91,7 +91,7 @@ static inline bool compaction_restarting(struct zone *zone, int order)
 #else
 static inline unsigned long try_to_compact_pages(struct zonelist *zonelist,
 			int order, gfp_t gfp_mask, nodemask_t *nodemask,
-			bool sync, bool *contended)
+			enum migrate_mode mode, bool *contended)
 {
 	return COMPACT_CONTINUE;
 }
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -323,9 +323,18 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
 #endif
 #ifndef __compiletime_error
 # define __compiletime_error(message)
-# define __compiletime_error_fallback(condition) \
+/*
+ * Sparse complains of variable sized arrays due to the temporary variable in
+ * __compiletime_assert. Unfortunately we can't just expand it out to make
+ * sparse see a constant array size without breaking compiletime_assert on old
+ * versions of GCC (e.g. 4.2.4), so hide the array from sparse altogether.
+ */
+# ifndef __CHECKER__
+#  define __compiletime_error_fallback(condition) \
 	do { ((void)sizeof(char[1 - 2 * condition])); } while (0)
-#else
+# endif
+#endif
+#ifndef __compiletime_error_fallback
 # define __compiletime_error_fallback(condition) do { } while (0)
 #endif

--- a/include/linux/cpuset.h
+++ b/include/linux/cpuset.h
@@ -12,10 +12,31 @@
 #include <linux/cpumask.h>
 #include <linux/nodemask.h>
 #include <linux/mm.h>
+#include <linux/jump_label.h>

 #ifdef CONFIG_CPUSETS

-extern int number_of_cpusets;	/* How many cpusets are defined in system? */
+extern struct static_key cpusets_enabled_key;
+static inline bool cpusets_enabled(void)
+{
+	return static_key_false(&cpusets_enabled_key);
+}
+
+static inline int nr_cpusets(void)
+{
+	/* jump label reference count + the top-level cpuset */
+	return static_key_count(&cpusets_enabled_key) + 1;
+}
+
+static inline void cpuset_inc(void)
+{
+	static_key_slow_inc(&cpusets_enabled_key);
+}
+
+static inline void cpuset_dec(void)
+{
+	static_key_slow_dec(&cpusets_enabled_key);
+}

 extern int cpuset_init(void);
 extern void cpuset_init_smp(void);
@@ -32,13 +53,13 @@ extern int __cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask);

 static inline int cpuset_node_allowed_softwall(int node, gfp_t gfp_mask)
 {
-	return number_of_cpusets <= 1 ||
+	return nr_cpusets() <= 1 ||
 		__cpuset_node_allowed_softwall(node, gfp_mask);
 }

 static inline int cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask)
 {
-	return number_of_cpusets <= 1 ||
+	return nr_cpusets() <= 1 ||
 		__cpuset_node_allowed_hardwall(node, gfp_mask);
 }

@@ -124,6 +145,8 @@ static inline void set_mems_allowed(nodemask_t nodemask)

 #else /* !CONFIG_CPUSETS */

+static inline bool cpusets_enabled(void) { return false; }
+
 static inline int cpuset_init(void) { return 0; }
 static inline void cpuset_init_smp(void) {}

--- a/include/linux/dma-contiguous.h
+++ b/include/linux/dma-contiguous.h
@@ -88,7 +88,8 @@ static inline void dma_contiguous_set_default(struct cma *cma)
 void dma_contiguous_reserve(phys_addr_t addr_limit);

 int __init dma_contiguous_reserve_area(phys_addr_t size, phys_addr_t base,
-				       phys_addr_t limit, struct cma **res_cma);
+				       phys_addr_t limit, struct cma **res_cma,
+				       bool fixed);

 /**
 * dma_declare_contiguous() - reserve area for contiguous memory handling
@@ -108,7 +109,7 @@ static inline int dma_declare_contiguous(struct device *dev, phys_addr_t size,
 {
 	struct cma *cma;
 	int ret;
-	ret = dma_contiguous_reserve_area(size, base, limit, &cma);
+	ret = dma_contiguous_reserve_area(size, base, limit, &cma, true);
 	if (ret == 0)
 		dev_set_cma_area(dev, cma);

@@ -136,7 +137,9 @@ static inline void dma_contiguous_set_default(struct cma *cma) { }
 static inline void dma_contiguous_reserve(phys_addr_t limit) { }

 static inline int dma_contiguous_reserve_area(phys_addr_t size, phys_addr_t base,
-				       phys_addr_t limit, struct cma **res_cma) {
+				       phys_addr_t limit, struct cma **res_cma,
+				       bool fixed)
+{
 	return -ENOSYS;
 }

--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2590,6 +2590,7 @@ extern ssize_t simple_read_from_buffer(void __user *to, size_t count,
 extern ssize_t simple_write_to_buffer(void *to, size_t available, loff_t *ppos,
 		const void __user *from, size_t count);

+extern int __generic_file_fsync(struct file *, loff_t, loff_t, int);
 extern int generic_file_fsync(struct file *, loff_t, loff_t, int);

 extern int generic_check_addressable(unsigned, u64);
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -6,7 +6,6 @@
 #include <linux/stddef.h>
 #include <linux/linkage.h>
 #include <linux/topology.h>
-#include <linux/mmdebug.h>

 struct vm_area_struct;

@@ -31,7 +30,6 @@ struct vm_area_struct;
 #define ___GFP_HARDWALL		0x20000u
 #define ___GFP_THISNODE		0x40000u
 #define ___GFP_RECLAIMABLE	0x80000u
-#define ___GFP_KMEMCG		0x100000u
 #define ___GFP_NOTRACK		0x200000u
 #define ___GFP_NO_KSWAPD	0x400000u
 #define ___GFP_OTHER_NODE	0x800000u
@@ -91,7 +89,6 @@ struct vm_area_struct;

 #define __GFP_NO_KSWAPD	((__force gfp_t)___GFP_NO_KSWAPD)
 #define __GFP_OTHER_NODE ((__force gfp_t)___GFP_OTHER_NODE) /* On behalf of other node */
-#define __GFP_KMEMCG	((__force gfp_t)___GFP_KMEMCG) /* Allocation comes from a memcg-accounted resource */
 #define __GFP_WRITE	((__force gfp_t)___GFP_WRITE)	/* Allocator intends to dirty page */

 /*
@@ -353,6 +350,10 @@ extern struct page *alloc_pages_vma(gfp_t gfp_mask, int order,
 #define alloc_page_vma_node(gfp_mask, vma, addr, node)		\
 	alloc_pages_vma(gfp_mask, 0, vma, addr, node)

+extern struct page *alloc_kmem_pages(gfp_t gfp_mask, unsigned int order);
+extern struct page *alloc_kmem_pages_node(int nid, gfp_t gfp_mask,
+					  unsigned int order);
+
 extern unsigned long __get_free_pages(gfp_t gfp_mask, unsigned int order);
 extern unsigned long get_zeroed_page(gfp_t gfp_mask);

@@ -369,11 +370,11 @@ void *alloc_pages_exact_nid(int nid, size_t size, gfp_t gfp_mask);

 extern void __free_pages(struct page *page, unsigned int order);
 extern void free_pages(unsigned long addr, unsigned int order);
-extern void free_hot_cold_page(struct page *page, int cold);
-extern void free_hot_cold_page_list(struct list_head *list, int cold);
+extern void free_hot_cold_page(struct page *page, bool cold);
+extern void free_hot_cold_page_list(struct list_head *list, bool cold);

-extern void __free_memcg_kmem_pages(struct page *page, unsigned int order);
-extern void free_memcg_kmem_pages(unsigned long addr, unsigned int order);
+extern void __free_kmem_pages(struct page *page, unsigned int order);
+extern void free_kmem_pages(unsigned long addr, unsigned int order);

 #define __free_page(page) __free_pages((page), 0)
 #define free_page(addr) free_pages((addr), 0)
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -343,6 +343,11 @@ static inline unsigned huge_page_shift(struct hstate *h)
 	return h->order + PAGE_SHIFT;
 }

+static inline bool hstate_is_gigantic(struct hstate *h)
+{
+	return huge_page_order(h) >= MAX_ORDER;
+}
+
 static inline unsigned int pages_per_huge_page(struct hstate *h)
 {
 	return 1 << h->order;
@@ -392,15 +397,13 @@ static inline pgoff_t basepage_index(struct page *page)

 extern void dissolve_free_huge_pages(unsigned long start_pfn,
 				     unsigned long end_pfn);
-int pmd_huge_support(void);
-/*
- * Currently hugepage migration is enabled only for pmd-based hugepage.
- * This function will be updated when hugepage migration is more widely
- * supported.
- */
-static inline int hugepage_migration_support(struct hstate *h)
+static inline int hugepage_migration_supported(struct hstate *h)
 {
-	return pmd_huge_support() && (huge_page_shift(h) == PMD_SHIFT);
+#ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
+	return huge_page_shift(h) == PMD_SHIFT;
+#else
+	return 0;
+#endif
 }

 static inline spinlock_t *huge_pte_lockptr(struct hstate *h,
@@ -450,8 +453,7 @@ static inline pgoff_t basepage_index(struct page *page)
 	return page->index;
 }
 #define dissolve_free_huge_pages(s, e)	do {} while (0)
-#define pmd_huge_support()	0
-#define hugepage_migration_support(h)	0
+#define hugepage_migration_supported(h)	0

 static inline spinlock_t *huge_pte_lockptr(struct hstate *h,
 					   struct mm_struct *mm, pte_t *pte)
--- a/include/linux/jump_label.h
+++ b/include/linux/jump_label.h
@@ -69,6 +69,10 @@ struct static_key {

 # include <asm/jump_label.h>
 # define HAVE_JUMP_LABEL
+#else
+struct static_key {
+	atomic_t enabled;
+};
 #endif	/* CC_HAVE_ASM_GOTO && CONFIG_JUMP_LABEL */

 enum jump_label_type {
@@ -79,6 +83,12 @@ enum jump_label_type {
 struct module;

 #include <linux/atomic.h>
+
+static inline int static_key_count(struct static_key *key)
+{
+	return atomic_read(&key->enabled);
+}
+
 #ifdef HAVE_JUMP_LABEL

 #define JUMP_LABEL_TYPE_FALSE_BRANCH	0UL
@@ -134,10 +144,6 @@ extern void jump_label_apply_nops(struct module *mod);

 #else  /* !HAVE_JUMP_LABEL */

-struct static_key {
-	atomic_t enabled;
-};
-
 static __always_inline void jump_label_init(void)
 {
 	static_key_initialized = true;
@@ -145,14 +151,14 @@ static __always_inline void jump_label_init(void)

 static __always_inline bool static_key_false(struct static_key *key)
 {
-	if (unlikely(atomic_read(&key->enabled) > 0))
+	if (unlikely(static_key_count(key) > 0))
 		return true;
 	return false;
 }

 static __always_inline bool static_key_true(struct static_key *key)
 {
-	if (likely(atomic_read(&key->enabled) > 0))
+	if (likely(static_key_count(key) > 0))
 		return true;
 	return false;
 }
@@ -194,7 +200,7 @@ static inline int jump_label_apply_nops(struct module *mod)

 static inline bool static_key_enabled(struct static_key *key)
 {
-	return (atomic_read(&key->enabled) > 0);
+	return static_key_count(key) > 0;
 }

 #endif	/* _LINUX_JUMP_LABEL_H */
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -272,6 +272,8 @@ static inline bool memblock_bottom_up(void) { return false; }
 #define MEMBLOCK_ALLOC_ANYWHERE	(~(phys_addr_t)0)
 #define MEMBLOCK_ALLOC_ACCESSIBLE	0

+phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
+					phys_addr_t start, phys_addr_t end);
 phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
 				phys_addr_t max_addr);
 phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -492,13 +492,9 @@ void __memcg_kmem_uncharge_pages(struct page *page, int order);

 int memcg_cache_id(struct mem_cgroup *memcg);

-char *memcg_create_cache_name(struct mem_cgroup *memcg,
-			      struct kmem_cache *root_cache);
 int memcg_alloc_cache_params(struct mem_cgroup *memcg, struct kmem_cache *s,
 			     struct kmem_cache *root_cache);
 void memcg_free_cache_params(struct kmem_cache *s);
-void memcg_register_cache(struct kmem_cache *s);
-void memcg_unregister_cache(struct kmem_cache *s);

 int memcg_update_cache_size(struct kmem_cache *s, int num_groups);
 void memcg_update_array_size(int num_groups);
@@ -506,8 +502,10 @@ void memcg_update_array_size(int num_groups);
 struct kmem_cache *
 __memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp);

-void mem_cgroup_destroy_cache(struct kmem_cache *cachep);
-int __kmem_cache_destroy_memcg_children(struct kmem_cache *s);
+int __memcg_charge_slab(struct kmem_cache *cachep, gfp_t gfp, int order);
+void __memcg_uncharge_slab(struct kmem_cache *cachep, int order);
+
+int __memcg_cleanup_cache_params(struct kmem_cache *s);

 /**
 * memcg_kmem_newpage_charge: verify if a new kmem allocation is allowed.
@@ -534,7 +532,7 @@ memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order)
 	 * res_counter_charge_nofail, but we hope those allocations are rare,
 	 * and won't be worth the trouble.
 	 */
-	if (!(gfp & __GFP_KMEMCG) || (gfp & __GFP_NOFAIL))
+	if (gfp & __GFP_NOFAIL)
 		return true;
 	if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD))
 		return true;
@@ -583,17 +581,7 @@ memcg_kmem_commit_charge(struct page *page, struct mem_cgroup *memcg, int order)
 * @cachep: the original global kmem cache
 * @gfp: allocation flags.
 *
- * This function assumes that the task allocating, which determines the memcg
- * in the page allocator, belongs to the same cgroup throughout the whole
- * process.  Misacounting can happen if the task calls memcg_kmem_get_cache()
- * while belonging to a cgroup, and later on changes. This is considered
- * acceptable, and should only happen upon task migration.
- *
- * Before the cache is created by the memcg core, there is also a possible
- * imbalance: the task belongs to a memcg, but the cache being allocated from
- * is the global cache, since the child cache is not yet guaranteed to be
- * ready. This case is also fine, since in this case the GFP_KMEMCG will not be
- * passed and the page allocator will not attempt any cgroup accounting.
+ * All memory allocated from a per-memcg cache is charged to the owner memcg.
 */
 static __always_inline struct kmem_cache *
 memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp)
@@ -648,14 +636,6 @@ static inline void memcg_free_cache_params(struct kmem_cache *s)
 {
 }

-static inline void memcg_register_cache(struct kmem_cache *s)
-{
-}
-
-static inline void memcg_unregister_cache(struct kmem_cache *s)
-{
-}
-
 static inline struct kmem_cache *
 memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp)
 {
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -187,14 +187,8 @@ extern void put_page_bootmem(struct page *page);
 extern void get_page_bootmem(unsigned long ingo, struct page *page,
 			     unsigned long type);

-/*
- * Lock for memory hotplug guarantees 1) all callbacks for memory hotplug
- * notifier will be called under this. 2) offline/online/add/remove memory
- * will not run simultaneously.
- */
-
-void lock_memory_hotplug(void);
-void unlock_memory_hotplug(void);
+void get_online_mems(void);
+void put_online_mems(void);

 #else /* ! CONFIG_MEMORY_HOTPLUG */
 /*
@@ -232,8 +226,8 @@ static inline int try_online_node(int nid)
 	return 0;
 }

-static inline void lock_memory_hotplug(void) {}
-static inline void unlock_memory_hotplug(void) {}
+static inline void get_online_mems(void) {}
+static inline void put_online_mems(void) {}

 #endif /* ! CONFIG_MEMORY_HOTPLUG */

--- a/include/linux/mempolicy.h
+++ b/include/linux/mempolicy.h
@@ -175,6 +175,12 @@ static inline int vma_migratable(struct vm_area_struct *vma)
 {
 	if (vma->vm_flags & (VM_IO | VM_PFNMAP))
 		return 0;
+
+#ifndef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
+	if (vma->vm_flags & VM_HUGETLB)
+		return 0;
+#endif
+
 	/*
 	 * Migration allocates pages in the highest zone. If we cannot
 	 * do so then migration (at least from node to node) is not
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -5,7 +5,9 @@
 #include <linux/mempolicy.h>
 #include <linux/migrate_mode.h>

-typedef struct page *new_page_t(struct page *, unsigned long private, int **);
+typedef struct page *new_page_t(struct page *page, unsigned long private,
+				int **reason);
+typedef void free_page_t(struct page *page, unsigned long private);

 /*
 * Return values from addresss_space_operations.migratepage():
@@ -38,7 +40,7 @@ enum migrate_reason {
 extern void putback_movable_pages(struct list_head *l);
 extern int migrate_page(struct address_space *,
 			struct page *, struct page *, enum migrate_mode);
-extern int migrate_pages(struct list_head *l, new_page_t x,
+extern int migrate_pages(struct list_head *l, new_page_t new, free_page_t free,
 		unsigned long private, enum migrate_mode mode, int reason);

 extern int migrate_prep(void);
@@ -56,8 +58,9 @@ extern int migrate_page_move_mapping(struct address_space *mapping,
 #else

 static inline void putback_movable_pages(struct list_head *l) {}
-static inline int migrate_pages(struct list_head *l, new_page_t x,
-		unsigned long private, enum migrate_mode mode, int reason)
+static inline int migrate_pages(struct list_head *l, new_page_t new,
+		free_page_t free, unsigned long private, enum migrate_mode mode,
+		int reason)
 	{ return -ENOSYS; }

 static inline int migrate_prep(void) { return -ENOSYS; }
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -407,20 +407,25 @@ static inline void compound_unlock_irqrestore(struct page *page,
 #endif
 }

+static inline struct page *compound_head_by_tail(struct page *tail)
+{
+	struct page *head = tail->first_page;
+
+	/*
+	 * page->first_page may be a dangling pointer to an old
+	 * compound page, so recheck that it is still a tail
+	 * page before returning.
+	 */
+	smp_rmb();
+	if (likely(PageTail(tail)))
+		return head;
+	return tail;
+}
+
 static inline struct page *compound_head(struct page *page)
 {
-	if (unlikely(PageTail(page))) {
-		struct page *head = page->first_page;
-
-		/*
-		 * page->first_page may be a dangling pointer to an old
-		 * compound page, so recheck that it is still a tail
-		 * page before returning.
-		 */
-		smp_rmb();
-		if (likely(PageTail(page)))
-			return head;
-	}
+	if (unlikely(PageTail(page)))
+		return compound_head_by_tail(page);
 	return page;
 }

--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -406,7 +406,7 @@ struct mm_struct {
 	spinlock_t			ioctx_lock;
 	struct kioctx_table __rcu	*ioctx_table;
 #endif
-#ifdef CONFIG_MM_OWNER
+#ifdef CONFIG_MEMCG
 	/*
 	 * "owner" points to a task that is regarded as the canonical
 	 * user/owner of this mm. All of the following must be true in
--- a/include/linux/mmdebug.h
+++ b/include/linux/mmdebug.h
@@ -1,6 +1,8 @@
 #ifndef LINUX_MM_DEBUG_H
 #define LINUX_MM_DEBUG_H 1

+#include <linux/stringify.h>
+
 struct page;

 extern void dump_page(struct page *page, const char *reason);
@@ -9,11 +11,20 @@ extern void dump_page_badflags(struct page *page, const char *reason,

 #ifdef CONFIG_DEBUG_VM
 #define VM_BUG_ON(cond) BUG_ON(cond)
-#define VM_BUG_ON_PAGE(cond, page) \
-	do { if (unlikely(cond)) { dump_page(page, NULL); BUG(); } } while (0)
+#define VM_BUG_ON_PAGE(cond, page)					\
+	do {								\
+		if (unlikely(cond)) {					\
+			dump_page(page, "VM_BUG_ON_PAGE(" __stringify(cond)")");\
+			BUG();						\
+		}							\
+	} while (0)
+#define VM_WARN_ON(cond) WARN_ON(cond)
+#define VM_WARN_ON_ONCE(cond) WARN_ON_ONCE(cond)
 #else
 #define VM_BUG_ON(cond) BUILD_BUG_ON_INVALID(cond)
 #define VM_BUG_ON_PAGE(cond, page) VM_BUG_ON(cond)
+#define VM_WARN_ON(cond) BUILD_BUG_ON_INVALID(cond)
+#define VM_WARN_ON_ONCE(cond) BUILD_BUG_ON_INVALID(cond)
 #endif

 #ifdef CONFIG_DEBUG_VIRTUAL
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -75,9 +75,18 @@ enum {

 extern int page_group_by_mobility_disabled;

-static inline int get_pageblock_migratetype(struct page *page)
+#define NR_MIGRATETYPE_BITS (PB_migrate_end - PB_migrate + 1)
+#define MIGRATETYPE_MASK ((1UL << NR_MIGRATETYPE_BITS) - 1)
+
+#define get_pageblock_migratetype(page)					\
+	get_pfnblock_flags_mask(page, page_to_pfn(page),		\
+			PB_migrate_end, MIGRATETYPE_MASK)
+
+static inline int get_pfnblock_migratetype(struct page *page, unsigned long pfn)
 {
-	return get_pageblock_flags_group(page, PB_migrate, PB_migrate_end);
+	BUILD_BUG_ON(PB_migrate_end - PB_migrate != 2);
+	return get_pfnblock_flags_mask(page, pfn, PB_migrate_end,
+					MIGRATETYPE_MASK);
 }

 struct free_area {
@@ -360,9 +369,10 @@ struct zone {
 	/* Set to true when the PG_migrate_skip bits should be cleared */
 	bool			compact_blockskip_flush;

-	/* pfns where compaction scanners should start */
+	/* pfn where compaction free scanner should start */
 	unsigned long		compact_cached_free_pfn;
-	unsigned long		compact_cached_migrate_pfn;
+	/* pfn where async and sync compaction migration scanner should start */
+	unsigned long		compact_cached_migrate_pfn[2];
 #endif
 #ifdef CONFIG_MEMORY_HOTPLUG
 	/* see spanned/present_pages for more description */
@@ -481,9 +491,8 @@ struct zone {
 	 * give them a chance of being in the same cacheline.
 	 *
 	 * Write access to present_pages at runtime should be protected by
-	 * lock_memory_hotplug()/unlock_memory_hotplug().  Any reader who can't
-	 * tolerant drift of present_pages should hold memory hotplug lock to
-	 * get a stable value.
+	 * mem_hotplug_begin/end(). Any reader who can't tolerant drift of
+	 * present_pages should get_online_mems() to get a stable value.
 	 *
 	 * Read access to managed_pages should be safe because it's unsigned
 	 * long. Write access to zone->managed_pages and totalram_pages are
@@ -763,10 +772,10 @@ typedef struct pglist_data {
 	unsigned long node_spanned_pages; /* total size of physical page
 					     range, including holes */
 	int node_id;
-	nodemask_t reclaim_nodes;	/* Nodes allowed to reclaim from */
 	wait_queue_head_t kswapd_wait;
 	wait_queue_head_t pfmemalloc_wait;
-	struct task_struct *kswapd;	/* Protected by lock_memory_hotplug() */
+	struct task_struct *kswapd;	/* Protected by
+					   mem_hotplug_begin/end() */
 	int kswapd_max_order;
 	enum zone_type classzone_idx;
 #ifdef CONFIG_NUMA_BALANCING
@@ -808,10 +817,10 @@ static inline bool pgdat_is_empty(pg_data_t *pgdat)
 extern struct mutex zonelists_mutex;
 void build_all_zonelists(pg_data_t *pgdat, struct zone *zone);
 void wakeup_kswapd(struct zone *zone, int order, enum zone_type classzone_idx);
-bool zone_watermark_ok(struct zone *z, int order, unsigned long mark,
-		int classzone_idx, int alloc_flags);
-bool zone_watermark_ok_safe(struct zone *z, int order, unsigned long mark,
-		int classzone_idx, int alloc_flags);
+bool zone_watermark_ok(struct zone *z, unsigned int order,
+		unsigned long mark, int classzone_idx, int alloc_flags);
+bool zone_watermark_ok_safe(struct zone *z, unsigned int order,
+		unsigned long mark, int classzone_idx, int alloc_flags);
 enum memmap_context {
 	MEMMAP_EARLY,
 	MEMMAP_HOTPLUG,
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -198,6 +198,7 @@ struct page;	/* forward declaration */
 TESTPAGEFLAG(Locked, locked)
 PAGEFLAG(Error, error) TESTCLEARFLAG(Error, error)
 PAGEFLAG(Referenced, referenced) TESTCLEARFLAG(Referenced, referenced)
+	__SETPAGEFLAG(Referenced, referenced)
 PAGEFLAG(Dirty, dirty) TESTSCFLAG(Dirty, dirty) __CLEARPAGEFLAG(Dirty, dirty)
 PAGEFLAG(LRU, lru) __CLEARPAGEFLAG(LRU, lru)
 PAGEFLAG(Active, active) __CLEARPAGEFLAG(Active, active)
@@ -208,6 +209,7 @@ PAGEFLAG(Pinned, pinned) TESTSCFLAG(Pinned, pinned)	/* Xen */
 PAGEFLAG(SavePinned, savepinned);			/* Xen */
 PAGEFLAG(Reserved, reserved) __CLEARPAGEFLAG(Reserved, reserved)
 PAGEFLAG(SwapBacked, swapbacked) __CLEARPAGEFLAG(SwapBacked, swapbacked)
+	__SETPAGEFLAG(SwapBacked, swapbacked)

 __PAGEFLAG(SlobFree, slob_free)

--- a/include/linux/pageblock-flags.h
+++ b/include/linux/pageblock-flags.h
@@ -30,9 +30,12 @@ enum pageblock_bits {
 	PB_migrate,
 	PB_migrate_end = PB_migrate + 3 - 1,
 			/* 3 bits required for migrate types */
-#ifdef CONFIG_COMPACTION
 	PB_migrate_skip,/* If set the block is skipped by compaction */
-#endif /* CONFIG_COMPACTION */
+
+	/*
+	 * Assume the bits will always align on a word. If this assumption
+	 * changes then get/set pageblock needs updating.
+	 */
 	NR_PAGEBLOCK_BITS
 };

@@ -62,11 +65,26 @@ extern int pageblock_order;
 /* Forward declaration */
 struct page;

+unsigned long get_pfnblock_flags_mask(struct page *page,
+				unsigned long pfn,
+				unsigned long end_bitidx,
+				unsigned long mask);
+
+void set_pfnblock_flags_mask(struct page *page,
+				unsigned long flags,
+				unsigned long pfn,
+				unsigned long end_bitidx,
+				unsigned long mask);
+
 /* Declarations for getting and setting flags. See mm/page_alloc.c */
-unsigned long get_pageblock_flags_group(struct page *page,
-					int start_bitidx, int end_bitidx);
-void set_pageblock_flags_group(struct page *page, unsigned long flags,
-					int start_bitidx, int end_bitidx);
+#define get_pageblock_flags_group(page, start_bitidx, end_bitidx) \
+	get_pfnblock_flags_mask(page, page_to_pfn(page),		\
+			end_bitidx,					\
+			(1 << (end_bitidx - start_bitidx + 1)) - 1)
+#define set_pageblock_flags_group(page, flags, start_bitidx, end_bitidx) \
+	set_pfnblock_flags_mask(page, flags, page_to_pfn(page),		\
+			end_bitidx,					\
+			(1 << (end_bitidx - start_bitidx + 1)) - 1)

 #ifdef CONFIG_COMPACTION
 #define get_pageblock_skip(page) \
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -110,7 +110,7 @@ static inline void mapping_set_gfp_mask(struct address_space *m, gfp_t mask)

 #define page_cache_get(page)		get_page(page)
 #define page_cache_release(page)	put_page(page)
-void release_pages(struct page **pages, int nr, int cold);
+void release_pages(struct page **pages, int nr, bool cold);

 /*
 * speculatively take a reference to a page.
@@ -259,12 +259,109 @@ pgoff_t page_cache_next_hole(struct address_space *mapping,
 pgoff_t page_cache_prev_hole(struct address_space *mapping,
 			     pgoff_t index, unsigned long max_scan);

+#define FGP_ACCESSED		0x00000001
+#define FGP_LOCK		0x00000002
+#define FGP_CREAT		0x00000004
+#define FGP_WRITE		0x00000008
+#define FGP_NOFS		0x00000010
+#define FGP_NOWAIT		0x00000020
+
+struct page *pagecache_get_page(struct address_space *mapping, pgoff_t offset,
+		int fgp_flags, gfp_t cache_gfp_mask, gfp_t radix_gfp_mask);
+
+/**
+ * find_get_page - find and get a page reference
+ * @mapping: the address_space to search
+ * @offset: the page index
+ *
+ * Looks up the page cache slot at @mapping & @offset.  If there is a
+ * page cache page, it is returned with an increased refcount.
+ *
+ * Otherwise, %NULL is returned.
+ */
+static inline struct page *find_get_page(struct address_space *mapping,
+					pgoff_t offset)
+{
+	return pagecache_get_page(mapping, offset, 0, 0, 0);
+}
+
+static inline struct page *find_get_page_flags(struct address_space *mapping,
+					pgoff_t offset, int fgp_flags)
+{
+	return pagecache_get_page(mapping, offset, fgp_flags, 0, 0);
+}
+
+/**
+ * find_lock_page - locate, pin and lock a pagecache page
+ * pagecache_get_page - find and get a page reference
+ * @mapping: the address_space to search
+ * @offset: the page index
+ *
+ * Looks up the page cache slot at @mapping & @offset.  If there is a
+ * page cache page, it is returned locked and with an increased
+ * refcount.
+ *
+ * Otherwise, %NULL is returned.
+ *
+ * find_lock_page() may sleep.
+ */
+static inline struct page *find_lock_page(struct address_space *mapping,
+					pgoff_t offset)
+{
+	return pagecache_get_page(mapping, offset, FGP_LOCK, 0, 0);
+}
+
+/**
+ * find_or_create_page - locate or add a pagecache page
+ * @mapping: the page's address_space
+ * @index: the page's index into the mapping
+ * @gfp_mask: page allocation mode
+ *
+ * Looks up the page cache slot at @mapping & @offset.  If there is a
+ * page cache page, it is returned locked and with an increased
+ * refcount.
+ *
+ * If the page is not present, a new page is allocated using @gfp_mask
+ * and added to the page cache and the VM's LRU list.  The page is
+ * returned locked and with an increased refcount.
+ *
+ * On memory exhaustion, %NULL is returned.
+ *
+ * find_or_create_page() may sleep, even if @gfp_flags specifies an
+ * atomic allocation!
+ */
+static inline struct page *find_or_create_page(struct address_space *mapping,
+					pgoff_t offset, gfp_t gfp_mask)
+{
+	return pagecache_get_page(mapping, offset,
+					FGP_LOCK|FGP_ACCESSED|FGP_CREAT,
+					gfp_mask, gfp_mask & GFP_RECLAIM_MASK);
+}
+
+/**
+ * grab_cache_page_nowait - returns locked page at given index in given cache
+ * @mapping: target address_space
+ * @index: the page index
+ *
+ * Same as grab_cache_page(), but do not wait if the page is unavailable.
+ * This is intended for speculative data generators, where the data can
+ * be regenerated if the page couldn't be grabbed.  This routine should
+ * be safe to call while holding the lock for another page.
+ *
+ * Clear __GFP_FS when allocating the page to avoid recursion into the fs
+ * and deadlock against the caller's locked page.
+ */
+static inline struct page *grab_cache_page_nowait(struct address_space *mapping,
+				pgoff_t index)
+{
+	return pagecache_get_page(mapping, index,
+			FGP_LOCK|FGP_CREAT|FGP_NOFS|FGP_NOWAIT,
+			mapping_gfp_mask(mapping),
+			GFP_NOFS);
+}
+
 struct page *find_get_entry(struct address_space *mapping, pgoff_t offset);
-struct page *find_get_page(struct address_space *mapping, pgoff_t offset);
 struct page *find_lock_entry(struct address_space *mapping, pgoff_t offset);
-struct page *find_lock_page(struct address_space *mapping, pgoff_t offset);
-struct page *find_or_create_page(struct address_space *mapping, pgoff_t index,
-				 gfp_t gfp_mask);
 unsigned find_get_entries(struct address_space *mapping, pgoff_t start,
 			  unsigned int nr_entries, struct page **entries,
 			  pgoff_t *indices);
@@ -287,8 +384,6 @@ static inline struct page *grab_cache_page(struct address_space *mapping,
 	return find_or_create_page(mapping, index, mapping_gfp_mask(mapping));
 }

-extern struct page * grab_cache_page_nowait(struct address_space *mapping,
-				pgoff_t index);
 extern struct page * read_cache_page(struct address_space *mapping,
 				pgoff_t index, filler_t *filler, void *data);
 extern struct page * read_cache_page_gfp(struct address_space *mapping,
@@ -425,6 +520,8 @@ static inline void wait_on_page_writeback(struct page *page)
 extern void end_page_writeback(struct page *page);
 void wait_for_stable_page(struct page *page);

+void page_endio(struct page *page, int rw, int err);
+
 /*
 * Add an arbitrary waiter to a page's wait queue
 */
--- a/include/linux/plist.h
+++ b/include/linux/plist.h
@@ -97,6 +97,13 @@ struct plist_node {
 	.node_list = LIST_HEAD_INIT((head).node_list)	\
 }

+/**
+ * PLIST_HEAD - declare and init plist_head
+ * @head:	name for struct plist_head variable
+ */
+#define PLIST_HEAD(head) \
+	struct plist_head head = PLIST_HEAD_INIT(head)
+
 /**
 * PLIST_NODE_INIT - static struct plist_node initializer
 * @node:	struct plist_node variable name
@@ -134,6 +141,8 @@ static inline void plist_node_init(struct plist_node *node, int prio)
 extern void plist_add(struct plist_node *node, struct plist_head *head);
 extern void plist_del(struct plist_node *node, struct plist_head *head);

+extern void plist_requeue(struct plist_node *node, struct plist_head *head);
+
 /**
 * plist_for_each - iterate over the plist
 * @pos:	the type * to use as a loop counter
@@ -142,6 +151,16 @@ extern void plist_del(struct plist_node *node, struct plist_head *head);
 #define plist_for_each(pos, head)	\
 	 list_for_each_entry(pos, &(head)->node_list, node_list)

+/**
+ * plist_for_each_continue - continue iteration over the plist
+ * @pos:	the type * to use as a loop cursor
+ * @head:	the head for your list
+ *
+ * Continue to iterate over plist, continuing after the current position.
+ */
+#define plist_for_each_continue(pos, head)	\
+	 list_for_each_entry_continue(pos, &(head)->node_list, node_list)
+
 /**
 * plist_for_each_safe - iterate safely over a plist of given type
 * @pos:	the type * to use as a loop counter
@@ -162,6 +181,18 @@ extern void plist_del(struct plist_node *node, struct plist_head *head);
 #define plist_for_each_entry(pos, head, mem)	\
 	 list_for_each_entry(pos, &(head)->node_list, mem.node_list)

+/**
+ * plist_for_each_entry_continue - continue iteration over list of given type
+ * @pos:	the type * to use as a loop cursor
+ * @head:	the head for your list
+ * @m:		the name of the list_struct within the struct
+ *
+ * Continue to iterate over list of given type, continuing after
+ * the current position.
+ */
+#define plist_for_each_entry_continue(pos, head, m)	\
+	list_for_each_entry_continue(pos, &(head)->node_list, m.node_list)
+
 /**
 * plist_for_each_entry_safe - iterate safely over list of given type
 * @pos:	the type * to use as a loop counter
@@ -228,6 +259,20 @@ static inline int plist_node_empty(const struct plist_node *node)
 	container_of(plist_last(head), type, member)
 #endif

+/**
+ * plist_next - get the next entry in list
+ * @pos:	the type * to cursor
+ */
+#define plist_next(pos) \
+	list_next_entry(pos, node_list)
+
+/**
+ * plist_prev - get the prev entry in list
+ * @pos:	the type * to cursor
+ */
+#define plist_prev(pos) \
+	list_prev_entry(pos, node_list)
+
 /**
 * plist_first - return the first node (and thus, highest priority)
 * @head:	the &struct plist_head pointer
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -30,6 +30,17 @@ static inline const char *printk_skip_level(const char *buffer)
 	return buffer;
 }

+/* printk's without a loglevel use this.. */
+#define DEFAULT_MESSAGE_LOGLEVEL CONFIG_DEFAULT_MESSAGE_LOGLEVEL
+
+/* We show everything that is MORE important than this.. */
+#define CONSOLE_LOGLEVEL_SILENT  0 /* Mum's the word */
+#define CONSOLE_LOGLEVEL_MIN	 1 /* Minimum loglevel we let people use */
+#define CONSOLE_LOGLEVEL_QUIET	 4 /* Shhh ..., when booted with "quiet" */
+#define CONSOLE_LOGLEVEL_DEFAULT 7 /* anything MORE serious than KERN_DEBUG */
+#define CONSOLE_LOGLEVEL_DEBUG	10 /* issue debug messages */
+#define CONSOLE_LOGLEVEL_MOTORMOUTH 15	/* You can't shut this one up */
+
 extern int console_printk[];

 #define console_loglevel (console_printk[0])
@@ -39,13 +50,13 @@ extern int console_printk[];

 static inline void console_silent(void)
 {
-	console_loglevel = 0;
+	console_loglevel = CONSOLE_LOGLEVEL_SILENT;
 }

 static inline void console_verbose(void)
 {
 	if (console_loglevel)
-		console_loglevel = 15;
+		console_loglevel = CONSOLE_LOGLEVEL_MOTORMOUTH;
 }

 struct va_format {
@@ -128,9 +139,9 @@ asmlinkage __printf(1, 2) __cold
 int printk(const char *fmt, ...);

 /*
- * Special printk facility for scheduler use only, _DO_NOT_USE_ !
+ * Special printk facility for scheduler/timekeeping use only, _DO_NOT_USE_ !
 */
-__printf(1, 2) __cold int printk_sched(const char *fmt, ...);
+__printf(1, 2) __cold int printk_deferred(const char *fmt, ...);

 /*
 * Please don't use printk_ratelimit(), because it shares ratelimiting state
@@ -165,7 +176,7 @@ int printk(const char *s, ...)
 	return 0;
 }
 static inline __printf(1, 2) __cold
-int printk_sched(const char *s, ...)
+int printk_deferred(const char *s, ...)
 {
 	return 0;
 }
@@ -210,6 +221,12 @@ extern asmlinkage void dump_stack(void) __cold;
 #define pr_fmt(fmt) fmt
 #endif

+/*
+ * These can be used to print at the various log levels.
+ * All of these will print unconditionally, although note that pr_debug()
+ * and other debug macros are compiled out unless either DEBUG is defined
+ * or CONFIG_DYNAMIC_DEBUG is set.
+ */
 #define pr_emerg(fmt, ...) \
 	printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
 #define pr_alert(fmt, ...) \
@@ -266,9 +283,20 @@ extern asmlinkage void dump_stack(void) __cold;
 		printk(fmt, ##__VA_ARGS__);			\
 	}							\
 })
+#define printk_deferred_once(fmt, ...)				\
+({								\
+	static bool __print_once __read_mostly;			\
+								\
+	if (!__print_once) {					\
+		__print_once = true;				\
+		printk_deferred(fmt, ##__VA_ARGS__);		\
+	}							\
+})
 #else
 #define printk_once(fmt, ...)					\
 	no_printk(fmt, ##__VA_ARGS__)
+#define printk_deferred_once(fmt, ...)				\
+	no_printk(fmt, ##__VA_ARGS__)
 #endif

 #define pr_emerg_once(fmt, ...)					\
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -44,6 +44,10 @@ extern int remove_proc_subtree(const char *, struct proc_dir_entry *);

 #else /* CONFIG_PROC_FS */

+static inline void proc_root_init(void)
+{
+}
+
 static inline void proc_flush_task(struct task_struct *task)
 {
 }
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h
@@ -72,10 +72,9 @@ struct anon_vma_chain {
 };

 enum ttu_flags {
-	TTU_UNMAP = 0,			/* unmap mode */
-	TTU_MIGRATION = 1,		/* migration mode */
-	TTU_MUNLOCK = 2,		/* munlock mode */
-	TTU_ACTION_MASK = 0xff,
+	TTU_UNMAP = 1,			/* unmap mode */
+	TTU_MIGRATION = 2,		/* migration mode */
+	TTU_MUNLOCK = 4,		/* munlock mode */

 	TTU_IGNORE_MLOCK = (1 << 8),	/* ignore mlock */
 	TTU_IGNORE_ACCESS = (1 << 9),	/* don't age */
@@ -183,14 +182,10 @@ static inline void page_dup_rmap(struct page *page)
 */
 int page_referenced(struct page *, int is_locked,
 			struct mem_cgroup *memcg, unsigned long *vm_flags);
-int page_referenced_one(struct page *, struct vm_area_struct *,
-	unsigned long address, void *arg);

 #define TTU_ACTION(x) ((x) & TTU_ACTION_MASK)

 int try_to_unmap(struct page *, enum ttu_flags flags);
-int try_to_unmap_one(struct page *, struct vm_area_struct *,
-			unsigned long address, void *arg);

 /*
 * Called from mm/filemap_xip.c to unmap empty zero page
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -136,12 +136,6 @@ struct filename;
 #define VMACACHE_SIZE (1U << VMACACHE_BITS)
 #define VMACACHE_MASK (VMACACHE_SIZE - 1)

-/*
- * List of flags we want to share for kernel threads,
- * if only because they are not used by them anyway.
- */
-#define CLONE_KERNEL	(CLONE_FS | CLONE_FILES | CLONE_SIGHAND)
-
 /*
 * These are the constant used to fake the fixed-point load-average
 * counting. Some notes:
@@ -745,7 +739,6 @@ static inline int signal_group_exit(const struct signal_struct *sig)
 struct user_struct {
 	atomic_t __count;	/* reference count */
 	atomic_t processes;	/* How many processes does this user have? */
-	atomic_t files;		/* How many open files does this user have? */
 	atomic_t sigpending;	/* How many pending signals does this user have? */
 #ifdef CONFIG_INOTIFY_USER
 	atomic_t inotify_watches; /* How many inotify watches does this user have? */
@@ -2967,7 +2960,7 @@ static inline void inc_syscw(struct task_struct *tsk)
 #define TASK_SIZE_OF(tsk)	TASK_SIZE
 #endif

-#ifdef CONFIG_MM_OWNER
+#ifdef CONFIG_MEMCG
 extern void mm_update_next_owner(struct mm_struct *mm);
 extern void mm_init_owner(struct mm_struct *mm, struct task_struct *p);
 #else
@@ -2978,7 +2971,7 @@ static inline void mm_update_next_owner(struct mm_struct *mm)
 static inline void mm_init_owner(struct mm_struct *mm, struct task_struct *p)
 {
 }
-#endif /* CONFIG_MM_OWNER */
+#endif /* CONFIG_MEMCG */

 static inline unsigned long task_rlimit(const struct task_struct *tsk,
 		unsigned int limit)
--- a/include/linux/sched/sysctl.h
+++ b/include/linux/sched/sysctl.h
@@ -25,6 +25,10 @@ enum { sysctl_hung_task_timeout_secs = 0 };
 * Because the kernel adds some informative sections to a image of program at
 * generating coredump, we need some margin. The number of extra sections is
 * 1-3 now and depends on arch. We use "5" as safe margin, here.
+ *
+ * ELF extended numbering allows more than 65535 sections, so 16-bit bound is
+ * not a hard limit any more. Although some userspace tools can be surprised by
+ * that.
 */
 #define MAPCOUNT_ELF_CORE_MARGIN	(5)
 #define DEFAULT_MAX_MAP_COUNT	(USHRT_MAX - MAPCOUNT_ELF_CORE_MARGIN)
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -116,7 +116,9 @@ struct kmem_cache *kmem_cache_create(const char *, size_t, size_t,
 			unsigned long,
 			void (*)(void *));
 #ifdef CONFIG_MEMCG_KMEM
-void kmem_cache_create_memcg(struct mem_cgroup *, struct kmem_cache *);
+struct kmem_cache *memcg_create_kmem_cache(struct mem_cgroup *,
+					   struct kmem_cache *,
+					   const char *);
 #endif
 void kmem_cache_destroy(struct kmem_cache *);
 int kmem_cache_shrink(struct kmem_cache *);
@@ -369,16 +371,7 @@ kmem_cache_alloc_node_trace(struct kmem_cache *s,
 #include <linux/slub_def.h>
 #endif

-static __always_inline void *
-kmalloc_order(size_t size, gfp_t flags, unsigned int order)
-{
-	void *ret;
-
-	flags |= (__GFP_COMP | __GFP_KMEMCG);
-	ret = (void *) __get_free_pages(flags, order);
-	kmemleak_alloc(ret, size, 1, flags);
-	return ret;
-}
+extern void *kmalloc_order(size_t size, gfp_t flags, unsigned int order);

 #ifdef CONFIG_TRACING
 extern void *kmalloc_order_trace(size_t size, gfp_t flags, unsigned int order);
@@ -533,10 +526,7 @@ static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
 * @memcg: pointer to the memcg this cache belongs to
 * @list: list_head for the list of all caches in this memcg
 * @root_cache: pointer to the global, root cache, this cache was derived from
- * @dead: set to true after the memcg dies; the cache may still be around.
 * @nr_pages: number of pages that belongs to this cache.
- * @destroy: worker to be called whenever we are ready, or believe we may be
- *           ready, to destroy this cache.
 */
 struct memcg_cache_params {
 	bool is_root_cache;
@@ -549,9 +539,7 @@ struct memcg_cache_params {
 			struct mem_cgroup *memcg;
 			struct list_head list;
 			struct kmem_cache *root_cache;
-			bool dead;
 			atomic_t nr_pages;
-			struct work_struct destroy;
 		};
 	};
 };
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -166,10 +166,10 @@ enum {
 #define COMPACT_CLUSTER_MAX SWAP_CLUSTER_MAX

 /*
- * Ratio between the present memory in the zone and the "gap" that
- * we're allowing kswapd to shrink in addition to the per-zone high
- * wmark, even for zones that already have the high wmark satisfied,
- * in order to provide better per-zone lru behavior. We are ok to
+ * Ratio between zone->managed_pages and the "gap" that above the per-zone
+ * "high_wmark". While balancing nodes, We allow kswapd to shrink zones that
+ * do not meet the (high_wmark + gap) watermark, even which already met the
+ * high_wmark, in order to provide better per-zone lru behavior. We are ok to
 * spend not more than 1% of the memory for this zone balancing "gap".
 */
 #define KSWAPD_ZONE_BALANCE_GAP_RATIO 100
@@ -214,8 +214,9 @@ struct percpu_cluster {
 struct swap_info_struct {
 	unsigned long	flags;		/* SWP_USED etc: see above */
 	signed short	prio;		/* swap priority of this type */
+	struct plist_node list;		/* entry in swap_active_head */
+	struct plist_node avail_list;	/* entry in swap_avail_head */
 	signed char	type;		/* strange name for an index */
-	signed char	next;		/* next type on the swap list */
 	unsigned int	max;		/* extent of the swap_map */
 	unsigned char *swap_map;	/* vmalloc'ed array of usage counts */
 	struct swap_cluster_info *cluster_info; /* cluster info. Only for SSD */
@@ -255,11 +256,6 @@ struct swap_info_struct {
 	struct swap_cluster_info discard_cluster_tail; /* list tail of discard clusters */
 };

-struct swap_list_t {
-	int head;	/* head of priority-ordered swapfile list */
-	int next;	/* swapfile to be used next */
-};
-
 /* linux/mm/workingset.c */
 void *workingset_eviction(struct address_space *mapping, struct page *page);
 bool workingset_refault(void *shadow);
@@ -308,12 +304,14 @@ extern unsigned long nr_free_pagecache_pages(void);


 /* linux/mm/swap.c */
-extern void __lru_cache_add(struct page *);
 extern void lru_cache_add(struct page *);
+extern void lru_cache_add_anon(struct page *page);
+extern void lru_cache_add_file(struct page *page);
 extern void lru_add_page_tail(struct page *page, struct page *page_tail,
 			 struct lruvec *lruvec, struct list_head *head);
 extern void activate_page(struct page *);
 extern void mark_page_accessed(struct page *);
+extern void init_page_accessed(struct page *page);
 extern void lru_add_drain(void);
 extern void lru_add_drain_cpu(int cpu);
 extern void lru_add_drain_all(void);
@@ -323,22 +321,6 @@ extern void swap_setup(void);

 extern void add_page_to_unevictable_list(struct page *page);

-/**
- * lru_cache_add: add a page to the page lists
- * @page: the page to add
- */
-static inline void lru_cache_add_anon(struct page *page)
-{
-	ClearPageActive(page);
-	__lru_cache_add(page);
-}
-
-static inline void lru_cache_add_file(struct page *page)
-{
-	ClearPageActive(page);
-	__lru_cache_add(page);
-}
-
 /* linux/mm/vmscan.c */
 extern unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
 					gfp_t gfp_mask, nodemask_t *mask);
@@ -496,7 +478,7 @@ mem_cgroup_uncharge_swapcache(struct page *page, swp_entry_t ent, bool swapout)
 #define free_page_and_swap_cache(page) \
 	page_cache_release(page)
 #define free_pages_and_swap_cache(pages, nr) \
-	release_pages((pages), (nr), 0);
+	release_pages((pages), (nr), false);

 static inline void show_swap_cache_info(void)
 {
--- a/include/linux/swapfile.h
+++ b/include/linux/swapfile.h
@@ -6,7 +6,7 @@
 * want to expose them to the dozens of source files that include swap.h
 */
 extern spinlock_t swap_lock;
-extern struct swap_list_t swap_list;
+extern struct plist_head swap_active_head;
 extern struct swap_info_struct *swap_info[];
 extern int try_to_unuse(unsigned int, bool, unsigned long);

--- a/include/linux/swapops.h
+++ b/include/linux/swapops.h
@@ -54,7 +54,7 @@ static inline pgoff_t swp_offset(swp_entry_t entry)
 /* check whether a pte points to a swap entry */
 static inline int is_swap_pte(pte_t pte)
 {
-	return !pte_none(pte) && !pte_present(pte) && !pte_file(pte);
+	return !pte_none(pte) && !pte_present_nonuma(pte) && !pte_file(pte);
 }
 #endif

--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -116,4 +116,6 @@ static inline void swiotlb_free(void) { }
 #endif

 extern void swiotlb_print_info(void);
+extern int is_swiotlb_buffer(phys_addr_t paddr);
+
 #endif /* __LINUX_SWIOTLB_H */
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -711,7 +711,7 @@ asmlinkage long sys_keyctl(int cmd, unsigned long arg2, unsigned long arg3,

 asmlinkage long sys_ioprio_set(int which, int who, int ioprio);
 asmlinkage long sys_ioprio_get(int which, int who);
-asmlinkage long sys_set_mempolicy(int mode, unsigned long __user *nmask,
+asmlinkage long sys_set_mempolicy(int mode, const unsigned long __user *nmask,
 				unsigned long maxnode);
 asmlinkage long sys_migrate_pages(pid_t pid, unsigned long maxnode,
 				const unsigned long __user *from,
@@ -723,7 +723,7 @@ asmlinkage long sys_move_pages(pid_t pid, unsigned long nr_pages,
 				int flags);
 asmlinkage long sys_mbind(unsigned long start, unsigned long len,
 				unsigned long mode,
-				unsigned long __user *nmask,
+				const unsigned long __user *nmask,
 				unsigned long maxnode,
 				unsigned flags);
 asmlinkage long sys_get_mempolicy(int __user *policy,
--- a/include/linux/thread_info.h
+++ b/include/linux/thread_info.h
@@ -61,8 +61,6 @@ extern long do_no_restart_syscall(struct restart_block *parm);
 # define THREADINFO_GFP		(GFP_KERNEL | __GFP_NOTRACK)
 #endif

-#define THREADINFO_GFP_ACCOUNTED (THREADINFO_GFP | __GFP_KMEMCG)
-
 /*
 * flag set/clear/test wrappers
 * - pass TIF_xxxx constants to these functions
--- a/include/linux/topology.h
+++ b/include/linux/topology.h
@@ -58,7 +58,8 @@ int arch_update_cpu_topology(void);
 /*
 * If the distance between nodes in a system is larger than RECLAIM_DISTANCE
 * (in whatever arch specific measurement units returned by node_distance())
- * then switch on zone reclaim on boot.
+ * and zone_reclaim_mode is enabled then the VM will only call zone_reclaim()
+ * on nodes within this distance.
 */
 #define RECLAIM_DISTANCE 30
 #endif
--- a/include/linux/vm_event_item.h
+++ b/include/linux/vm_event_item.h
@@ -80,6 +80,10 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
 		NR_TLB_LOCAL_FLUSH_ALL,
 		NR_TLB_LOCAL_FLUSH_ONE,
 #endif /* CONFIG_DEBUG_TLBFLUSH */
+#ifdef CONFIG_DEBUG_VM_VMACACHE
+		VMACACHE_FIND_CALLS,
+		VMACACHE_FIND_HITS,
+#endif
 		NR_VM_EVENT_ITEMS
 };

--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -95,6 +95,12 @@ static inline void vm_events_fold_cpu(int cpu)
 #define count_vm_tlb_events(x, y) do { (void)(y); } while (0)
 #endif

+#ifdef CONFIG_DEBUG_VM_VMACACHE
+#define count_vm_vmacache_event(x) count_vm_event(x)
+#else
+#define count_vm_vmacache_event(x) do {} while (0)
+#endif
+
 #define __count_zone_vm_events(item, zone, delta) \
 		__count_vm_events(item##_NORMAL - ZONE_NORMAL + \
 		zone_idx(zone), delta)
--- a/include/linux/zbud.h
+++ b/include/linux/zbud.h
@@ -11,7 +11,7 @@ struct zbud_ops {

 struct zbud_pool *zbud_create_pool(gfp_t gfp, struct zbud_ops *ops);
 void zbud_destroy_pool(struct zbud_pool *pool);
-int zbud_alloc(struct zbud_pool *pool, int size, gfp_t gfp,
+int zbud_alloc(struct zbud_pool *pool, unsigned int size, gfp_t gfp,
 	unsigned long *handle);
 void zbud_free(struct zbud_pool *pool, unsigned long handle);
 int zbud_reclaim_page(struct zbud_pool *pool, unsigned int retries);