Merge branch 'akpm' (patches from Andrew)

Merge first patchbomb from Andrew Morton:

 - arch/sh updates

 - ocfs2 updates

 - kernel/watchdog feature

 - about half of mm/

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (122 commits)
  Documentation: update arch list in the 'memtest' entry
  Kconfig: memtest: update number of test patterns up to 17
  arm: add support for memtest
  arm64: add support for memtest
  memtest: use phys_addr_t for physical addresses
  mm: move memtest under mm
  mm, hugetlb: abort __get_user_pages if current has been oom killed
  mm, mempool: do not allow atomic resizing
  memcg: print cgroup information when system panics due to panic_on_oom
  mm: numa: remove migrate_ratelimited
  mm: fold arch_randomize_brk into ARCH_HAS_ELF_RANDOMIZE
  mm: split ET_DYN ASLR from mmap ASLR
  s390: redefine randomize_et_dyn for ELF_ET_DYN_BASE
  mm: expose arch_mmap_rnd when available
  s390: standardize mmap_rnd() usage
  powerpc: standardize mmap_rnd() usage
  mips: extract logic for mmap_rnd()
  arm64: standardize mmap_rnd() usage
  x86: standardize mmap_rnd() usage
  arm: factor out mmap ASLR into mmap_rnd
  ...

17 files changed, 114 insertions, 44 deletions

diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 4d46085c1b90..39f1d6a2b04d 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -6,6 +6,12 @@
 
 #include <linux/mm_types.h>
 #include <linux/bug.h>
+#include <linux/errno.h>
+
+#if 4 - defined(__PAGETABLE_PUD_FOLDED) - defined(__PAGETABLE_PMD_FOLDED) != \
+	CONFIG_PGTABLE_LEVELS
+#error CONFIG_PGTABLE_LEVELS is not consistent with __PAGETABLE_{PUD,PMD}_FOLDED
+#endif
 
 /*
  * On almost all architectures and configurations, 0 can be used as the
@@ -691,6 +697,30 @@ static inline int pmd_protnone(pmd_t pmd)
 
 #endif /* CONFIG_MMU */
 
+#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
+int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot);
+int pmd_set_huge(pmd_t *pmd, phys_addr_t addr, pgprot_t prot);
+int pud_clear_huge(pud_t *pud);
+int pmd_clear_huge(pmd_t *pmd);
+#else	/* !CONFIG_HAVE_ARCH_HUGE_VMAP */
+static inline int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot)
+{
+	return 0;
+}
+static inline int pmd_set_huge(pmd_t *pmd, phys_addr_t addr, pgprot_t prot)
+{
+	return 0;
+}
+static inline int pud_clear_huge(pud_t *pud)
+{
+	return 0;
+}
+static inline int pmd_clear_huge(pmd_t *pmd)
+{
+	return 0;
+}
+#endif	/* CONFIG_HAVE_ARCH_HUGE_VMAP */
+
 #endif /* !__ASSEMBLY__ */
 
 #ifndef io_remap_pfn_range
diff --git a/include/linux/cleancache.h b/include/linux/cleancache.h
index 4ce9056b31a8..bda5ec0b4b4d 100644
--- a/include/linux/cleancache.h
+++ b/include/linux/cleancache.h
@@ -5,6 +5,10 @@
 #include <linux/exportfs.h>
 #include <linux/mm.h>
 
+#define CLEANCACHE_NO_POOL		-1
+#define CLEANCACHE_NO_BACKEND		-2
+#define CLEANCACHE_NO_BACKEND_SHARED	-3
+
 #define CLEANCACHE_KEY_MAX 6
 
 /*
@@ -33,10 +37,9 @@ struct cleancache_ops {
 	void (*invalidate_fs)(int);
 };
 
-extern struct cleancache_ops *
-	cleancache_register_ops(struct cleancache_ops *ops);
+extern int cleancache_register_ops(struct cleancache_ops *ops);
 extern void __cleancache_init_fs(struct super_block *);
-extern void __cleancache_init_shared_fs(char *, struct super_block *);
+extern void __cleancache_init_shared_fs(struct super_block *);
 extern int  __cleancache_get_page(struct page *);
 extern void __cleancache_put_page(struct page *);
 extern void __cleancache_invalidate_page(struct address_space *, struct page *);
@@ -78,10 +81,10 @@ static inline void cleancache_init_fs(struct super_block *sb)
 		__cleancache_init_fs(sb);
 }
 
-static inline void cleancache_init_shared_fs(char *uuid, struct super_block *sb)
+static inline void cleancache_init_shared_fs(struct super_block *sb)
 {
 	if (cleancache_enabled)
-		__cleancache_init_shared_fs(uuid, sb);
+		__cleancache_init_shared_fs(sb);
 }
 
 static inline int cleancache_get_page(struct page *page)
diff --git a/include/linux/cma.h b/include/linux/cma.h
index 9384ba66e975..f7ef093ec49a 100644
--- a/include/linux/cma.h
+++ b/include/linux/cma.h
@@ -16,16 +16,16 @@
 struct cma;
 
 extern unsigned long totalcma_pages;
-extern phys_addr_t cma_get_base(struct cma *cma);
-extern unsigned long cma_get_size(struct cma *cma);
+extern phys_addr_t cma_get_base(const struct cma *cma);
+extern unsigned long cma_get_size(const struct cma *cma);
 
 extern int __init cma_declare_contiguous(phys_addr_t base,
 			phys_addr_t size, phys_addr_t limit,
 			phys_addr_t alignment, unsigned int order_per_bit,
 			bool fixed, struct cma **res_cma);
-extern int cma_init_reserved_mem(phys_addr_t base,
-					phys_addr_t size, int order_per_bit,
+extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
+					unsigned int order_per_bit,
 					struct cma **res_cma);
-extern struct page *cma_alloc(struct cma *cma, int count, unsigned int align);
-extern bool cma_release(struct cma *cma, struct page *pages, int count);
+extern struct page *cma_alloc(struct cma *cma, unsigned int count, unsigned int align);
+extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count);
 #endif
diff --git a/include/linux/elf-randomize.h b/include/linux/elf-randomize.h
new file mode 100644
index 000000000000..b5f0bda9472e
--- /dev/null
+++ b/include/linux/elf-randomize.h
@@ -0,0 +1,22 @@
+#ifndef _ELF_RANDOMIZE_H
+#define _ELF_RANDOMIZE_H
+
+struct mm_struct;
+
+#ifndef CONFIG_ARCH_HAS_ELF_RANDOMIZE
+static inline unsigned long arch_mmap_rnd(void) { return 0; }
+# if defined(arch_randomize_brk) && defined(CONFIG_COMPAT_BRK)
+#  define compat_brk_randomized
+# endif
+# ifndef arch_randomize_brk
+#  define arch_randomize_brk(mm)	(mm->brk)
+# endif
+#else
+extern unsigned long arch_mmap_rnd(void);
+extern unsigned long arch_randomize_brk(struct mm_struct *mm);
+# ifdef CONFIG_COMPAT_BRK
+#  define compat_brk_randomized
+# endif
+#endif
+
+#endif
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 51bd1e72a917..97a9373e61e8 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -57,8 +57,10 @@ struct vm_area_struct;
  * _might_ fail.  This depends upon the particular VM implementation.
  *
  * __GFP_NOFAIL: The VM implementation _must_ retry infinitely: the caller
- * cannot handle allocation failures.  This modifier is deprecated and no new
- * users should be added.
+ * cannot handle allocation failures. New users should be evaluated carefully
+ * (and the flag should be used only when there is no reasonable failure policy)
+ * but it is definitely preferable to use the flag rather than opencode endless
+ * loop around allocator.
  *
  * __GFP_NORETRY: The VM implementation must not retry indefinitely.
  *
@@ -117,16 +119,6 @@ struct vm_area_struct;
 			 __GFP_NOMEMALLOC | __GFP_NORETRY | __GFP_NOWARN | \
 			 __GFP_NO_KSWAPD)
 
-/*
- * GFP_THISNODE does not perform any reclaim, you most likely want to
- * use __GFP_THISNODE to allocate from a given node without fallback!
- */
-#ifdef CONFIG_NUMA
-#define GFP_THISNODE	(__GFP_THISNODE | __GFP_NOWARN | __GFP_NORETRY)
-#else
-#define GFP_THISNODE	((__force gfp_t)0)
-#endif
-
 /* This mask makes up all the page movable related flags */
 #define GFP_MOVABLE_MASK (__GFP_RECLAIMABLE|__GFP_MOVABLE)
 
diff --git a/include/linux/io.h b/include/linux/io.h
index fa02e55e5a2e..4cc299c598e0 100644
--- a/include/linux/io.h
+++ b/include/linux/io.h
@@ -38,6 +38,14 @@ static inline int ioremap_page_range(unsigned long addr, unsigned long end,
 }
 #endif
 
+#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
+void __init ioremap_huge_init(void);
+int arch_ioremap_pud_supported(void);
+int arch_ioremap_pmd_supported(void);
+#else
+static inline void ioremap_huge_init(void) { }
+#endif
+
 /*
  * Managed iomap interface
  */
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index e8cc45307f8f..9497ec7c77ea 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -365,6 +365,14 @@ static inline unsigned long memblock_region_reserved_end_pfn(const struct memblo
 #define __initdata_memblock
 #endif
 
+#ifdef CONFIG_MEMTEST
+extern void early_memtest(phys_addr_t start, phys_addr_t end);
+#else
+static inline void early_memtest(phys_addr_t start, phys_addr_t end)
+{
+}
+#endif
+
 #else
 static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
 {
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 8f1a41951df9..6ffa0ac7f7d6 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -192,6 +192,9 @@ extern void get_page_bootmem(unsigned long ingo, struct page *page,
 void get_online_mems(void);
 void put_online_mems(void);
 
+void mem_hotplug_begin(void);
+void mem_hotplug_done(void);
+
 #else /* ! CONFIG_MEMORY_HOTPLUG */
 /*
  * Stub functions for when hotplug is off
@@ -231,6 +234,9 @@ static inline int try_online_node(int nid)
 static inline void get_online_mems(void) {}
 static inline void put_online_mems(void) {}
 
+static inline void mem_hotplug_begin(void) {}
+static inline void mem_hotplug_done(void) {}
+
 #endif /* ! CONFIG_MEMORY_HOTPLUG */
 
 #ifdef CONFIG_MEMORY_HOTREMOVE
diff --git a/include/linux/mempool.h b/include/linux/mempool.h
index 39ed62ab5b8a..b19b3023c880 100644
--- a/include/linux/mempool.h
+++ b/include/linux/mempool.h
@@ -29,7 +29,7 @@ extern mempool_t *mempool_create_node(int min_nr, mempool_alloc_t *alloc_fn,
 			mempool_free_t *free_fn, void *pool_data,
 			gfp_t gfp_mask, int nid);
 
-extern int mempool_resize(mempool_t *pool, int new_min_nr, gfp_t gfp_mask);
+extern int mempool_resize(mempool_t *pool, int new_min_nr);
 extern void mempool_destroy(mempool_t *pool);
 extern void * mempool_alloc(mempool_t *pool, gfp_t gfp_mask);
 extern void mempool_free(void *element, mempool_t *pool);
diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index 78baed5f2952..cac1c0904d5f 100644
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -69,7 +69,6 @@ static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
 extern bool pmd_trans_migrating(pmd_t pmd);
 extern int migrate_misplaced_page(struct page *page,
 				  struct vm_area_struct *vma, int node);
-extern bool migrate_ratelimited(int node);
 #else
 static inline bool pmd_trans_migrating(pmd_t pmd)
 {
@@ -80,10 +79,6 @@ static inline int migrate_misplaced_page(struct page *page,
 {
 	return -EAGAIN; /* can't migrate now */
 }
-static inline bool migrate_ratelimited(int node)
-{
-	return false;
-}
 #endif /* CONFIG_NUMA_BALANCING */
 
 #if defined(CONFIG_NUMA_BALANCING) && defined(CONFIG_TRANSPARENT_HUGEPAGE)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 47a93928b90f..6571dd78e984 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1294,9 +1294,11 @@ int __set_page_dirty_no_writeback(struct page *page);
 int redirty_page_for_writepage(struct writeback_control *wbc,
 				struct page *page);
 void account_page_dirtied(struct page *page, struct address_space *mapping);
+void account_page_cleaned(struct page *page, struct address_space *mapping);
 int set_page_dirty(struct page *page);
 int set_page_dirty_lock(struct page *page);
 int clear_page_dirty_for_io(struct page *page);
+
 int get_cmdline(struct task_struct *task, char *buffer, int buflen);
 
 /* Is the vma a continuation of the stack vma above it? */
@@ -2109,7 +2111,7 @@ static inline struct page *follow_page(struct vm_area_struct *vma,
 #define FOLL_FORCE	0x10	/* get_user_pages read/write w/o permission */
 #define FOLL_NOWAIT	0x20	/* if a disk transfer is needed, start the IO
 				 * and return without waiting upon it */
-#define FOLL_MLOCK	0x40	/* mark page as mlocked */
+#define FOLL_POPULATE	0x40	/* fault in page */
 #define FOLL_SPLIT	0x80	/* don't return transhuge pages, split them */
 #define FOLL_HWPOISON	0x100	/* check page is hwpoisoned */
 #define FOLL_NUMA	0x200	/* force NUMA hinting page fault */
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 199a03aab8dc..590630eb59ba 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -364,7 +364,9 @@ struct mm_struct {
 	atomic_t mm_users;			/* How many users with user space? */
 	atomic_t mm_count;			/* How many references to "struct mm_struct" (users count as 1) */
 	atomic_long_t nr_ptes;			/* PTE page table pages */
+#if CONFIG_PGTABLE_LEVELS > 2
 	atomic_long_t nr_pmds;			/* PMD page table pages */
+#endif
 	int map_count;				/* number of VMAs */
 
 	spinlock_t page_table_lock;		/* Protects page tables and some counters */
diff --git a/include/linux/nmi.h b/include/linux/nmi.h
index 9b2022ab4d85..3d46fb4708e0 100644
--- a/include/linux/nmi.h
+++ b/include/linux/nmi.h
@@ -25,16 +25,11 @@ static inline void touch_nmi_watchdog(void)
 #endif
 
 #if defined(CONFIG_HARDLOCKUP_DETECTOR)
-extern void watchdog_enable_hardlockup_detector(bool val);
-extern bool watchdog_hardlockup_detector_is_enabled(void);
+extern void hardlockup_detector_disable(void);
 #else
-static inline void watchdog_enable_hardlockup_detector(bool val)
+static inline void hardlockup_detector_disable(void)
 {
 }
-static inline bool watchdog_hardlockup_detector_is_enabled(void)
-{
-	return true;
-}
 #endif
 
 /*
@@ -68,12 +63,20 @@ static inline bool trigger_allbutself_cpu_backtrace(void)
 #ifdef CONFIG_LOCKUP_DETECTOR
 int hw_nmi_is_cpu_stuck(struct pt_regs *);
 u64 hw_nmi_get_sample_period(int watchdog_thresh);
+extern int nmi_watchdog_enabled;
+extern int soft_watchdog_enabled;
 extern int watchdog_user_enabled;
 extern int watchdog_thresh;
 extern int sysctl_softlockup_all_cpu_backtrace;
 struct ctl_table;
-extern int proc_dowatchdog(struct ctl_table *, int ,
-			   void __user *, size_t *, loff_t *);
+extern int proc_watchdog(struct ctl_table *, int ,
+			 void __user *, size_t *, loff_t *);
+extern int proc_nmi_watchdog(struct ctl_table *, int ,
+			     void __user *, size_t *, loff_t *);
+extern int proc_soft_watchdog(struct ctl_table *, int ,
+			      void __user *, size_t *, loff_t *);
+extern int proc_watchdog_thresh(struct ctl_table *, int ,
+				void __user *, size_t *, loff_t *);
 #endif
 
 #ifdef CONFIG_HAVE_ACPI_APEI_NMI
diff --git a/include/linux/oom.h b/include/linux/oom.h
index d5771bed59c9..44b2f6f7bbd8 100644
--- a/include/linux/oom.h
+++ b/include/linux/oom.h
@@ -66,7 +66,8 @@ extern bool oom_zonelist_trylock(struct zonelist *zonelist, gfp_t gfp_flags);
 extern void oom_zonelist_unlock(struct zonelist *zonelist, gfp_t gfp_flags);
 
 extern void check_panic_on_oom(enum oom_constraint constraint, gfp_t gfp_mask,
-			       int order, const nodemask_t *nodemask);
+			       int order, const nodemask_t *nodemask,
+			       struct mem_cgroup *memcg);
 
 extern enum oom_scan_t oom_scan_process_thread(struct task_struct *task,
 		unsigned long totalpages, const nodemask_t *nodemask,
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 5ed7bdaf22d5..c851ff92d5b3 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -328,8 +328,6 @@ static inline void SetPageUptodate(struct page *page)
 
 CLEARPAGEFLAG(Uptodate, uptodate)
 
-extern void cancel_dirty_page(struct page *page, unsigned int account_size);
-
 int test_clear_page_writeback(struct page *page);
 int __test_set_page_writeback(struct page *page, bool keep_write);
 
diff --git a/include/linux/slab.h b/include/linux/slab.h
index 76f1feeabd38..ffd24c830151 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -18,7 +18,7 @@
 
 /*
  * Flags to pass to kmem_cache_create().
- * The ones marked DEBUG are only valid if CONFIG_SLAB_DEBUG is set.
+ * The ones marked DEBUG are only valid if CONFIG_DEBUG_SLAB is set.
  */
 #define SLAB_DEBUG_FREE		0x00000100UL	/* DEBUG: Perform (expensive) checks on free */
 #define SLAB_RED_ZONE		0x00000400UL	/* DEBUG: Red zone objs in a cache */
diff --git a/include/trace/events/xen.h b/include/trace/events/xen.h
index d06b6da5c1e3..bce990f5a35d 100644
--- a/include/trace/events/xen.h
+++ b/include/trace/events/xen.h
@@ -224,7 +224,7 @@ TRACE_EVENT(xen_mmu_pmd_clear,
 	    TP_printk("pmdp %p", __entry->pmdp)
 	);
 
-#if PAGETABLE_LEVELS >= 4
+#if CONFIG_PGTABLE_LEVELS >= 4
 
 TRACE_EVENT(xen_mmu_set_pud,
 	    TP_PROTO(pud_t *pudp, pud_t pudval),