Merge branch 'akpm' (patches from Andrew)

Merge fixes from Andrew Morton:
 "10 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  drivers/pinctrl/intel/pinctrl-baytrail.c: fix build with gcc-4.4
  update "mm/zsmalloc: don't fail if can't create debugfs info"
  dma-debug: avoid spinlock recursion when disabling dma-debug
  mm: oom_reaper: remove some bloat
  memcg: fix mem_cgroup_out_of_memory() return value.
  ocfs2: fix improper handling of return errno
  mm: slub: remove unused virt_to_obj()
  mm: kasan: remove unused 'reserved' field from struct kasan_alloc_meta
  mm: make CONFIG_DEFERRED_STRUCT_PAGE_INIT depends on !FLATMEM explicitly
  seqlock: fix raw_read_seqcount_latch()

12 files changed, 37 insertions, 49 deletions

diff --git a/drivers/pinctrl/intel/pinctrl-baytrail.c b/drivers/pinctrl/intel/pinctrl-baytrail.c
index 55182fc58c6a..677a811b3a6f 100644
--- a/drivers/pinctrl/intel/pinctrl-baytrail.c
+++ b/drivers/pinctrl/intel/pinctrl-baytrail.c
@@ -153,8 +153,10 @@ struct byt_community {
 		.name			= (n),			\
 		.pins			= (p),			\
 		.npins			= ARRAY_SIZE((p)),	\
-		.has_simple_funcs	= 1,		\
-		.simple_funcs		= (f),			\
+		.has_simple_funcs	= 1,			\
+		{						\
+			.simple_funcs		= (f),		\
+		},						\
 		.nfuncs			= ARRAY_SIZE((f)),	\
 	}
 #define PIN_GROUP_MIXED(n, p, f)				\
@@ -163,7 +165,9 @@ struct byt_community {
 		.pins			= (p),			\
 		.npins			= ARRAY_SIZE((p)),	\
 		.has_simple_funcs	= 0,			\
-		.mixed_funcs		= (f),			\
+		{						\
+			.mixed_funcs		= (f),		\
+		},						\
 		.nfuncs			= ARRAY_SIZE((f)),	\
 	}
 
diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index 0748777f2e2a..c56a7679df93 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -176,12 +176,7 @@ struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, unsigned flags,
 	}
 	if (is_bad_inode(inode)) {
 		iput(inode);
-		if ((flags & OCFS2_FI_FLAG_FILECHECK_CHK) ||
-		    (flags & OCFS2_FI_FLAG_FILECHECK_FIX))
-			/* Return OCFS2_FILECHECK_ERR_XXX related errno */
-			inode = ERR_PTR(rc);
-		else
-			inode = ERR_PTR(-ESTALE);
+		inode = ERR_PTR(rc);
 		goto bail;
 	}
 
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index d553855503e6..ca3e517980a0 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -514,7 +514,9 @@ struct mm_struct {
 #ifdef CONFIG_HUGETLB_PAGE
 	atomic_long_t hugetlb_usage;
 #endif
+#ifdef CONFIG_MMU
 	struct work_struct async_put_work;
+#endif
 };
 
 static inline void mm_init_cpumask(struct mm_struct *mm)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 23e075dcdfe4..6e42ada26345 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2745,10 +2745,12 @@ static inline bool mmget_not_zero(struct mm_struct *mm)
 
 /* mmput gets rid of the mappings and all user-space */
 extern void mmput(struct mm_struct *);
-/* same as above but performs the slow path from the async kontext. Can
+#ifdef CONFIG_MMU
+/* same as above but performs the slow path from the async context. Can
  * be called from the atomic context as well
  */
 extern void mmput_async(struct mm_struct *);
+#endif
 
 /* Grab a reference to a task's mm, if it is not already going away */
 extern struct mm_struct *get_task_mm(struct task_struct *task);
diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h
index e0582106ef4f..7973a821ac58 100644
--- a/include/linux/seqlock.h
+++ b/include/linux/seqlock.h
@@ -277,7 +277,7 @@ static inline void raw_write_seqcount_barrier(seqcount_t *s)
 
 static inline int raw_read_seqcount_latch(seqcount_t *s)
 {
-	return lockless_dereference(s->sequence);
+	return lockless_dereference(s)->sequence;
 }
 
 /**
@@ -331,7 +331,7 @@ static inline int raw_read_seqcount_latch(seqcount_t *s)
  *	unsigned seq, idx;
  *
  *	do {
- *		seq = lockless_dereference(latch->seq);
+ *		seq = lockless_dereference(latch)->seq;
  *
  *		idx = seq & 0x01;
  *		entry = data_query(latch->data[idx], ...);
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index 665cd0cd18b8..d1faa019c02a 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -111,22 +111,6 @@ static inline void sysfs_slab_remove(struct kmem_cache *s)
 }
 #endif
 
-
-/**
- * virt_to_obj - returns address of the beginning of object.
- * @s: object's kmem_cache
- * @slab_page: address of slab page
- * @x: address within object memory range
- *
- * Returns address of the beginning of object
- */
-static inline void *virt_to_obj(struct kmem_cache *s,
-				const void *slab_page,
-				const void *x)
-{
-	return (void *)x - ((x - slab_page) % s->size);
-}
-
 void object_err(struct kmem_cache *s, struct page *page,
 		u8 *object, char *reason);
 
diff --git a/kernel/fork.c b/kernel/fork.c
index 47887bba944f..5c2c355aa97f 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -736,6 +736,7 @@ void mmput(struct mm_struct *mm)
 }
 EXPORT_SYMBOL_GPL(mmput);
 
+#ifdef CONFIG_MMU
 static void mmput_async_fn(struct work_struct *work)
 {
 	struct mm_struct *mm = container_of(work, struct mm_struct, async_put_work);
@@ -749,6 +750,7 @@ void mmput_async(struct mm_struct *mm)
 		schedule_work(&mm->async_put_work);
 	}
 }
+#endif
 
 /**
  * set_mm_exe_file - change a reference to the mm's executable file
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index 4a1515f4b452..51a76af25c66 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -657,9 +657,9 @@ static struct dma_debug_entry *dma_entry_alloc(void)
 	spin_lock_irqsave(&free_entries_lock, flags);
 
 	if (list_empty(&free_entries)) {
-		pr_err("DMA-API: debugging out of memory - disabling\n");
 		global_disable = true;
 		spin_unlock_irqrestore(&free_entries_lock, flags);
+		pr_err("DMA-API: debugging out of memory - disabling\n");
 		return NULL;
 	}
 
diff --git a/mm/Kconfig b/mm/Kconfig
index 2664c118b5d2..22fa8189e4fc 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -649,6 +649,7 @@ config DEFERRED_STRUCT_PAGE_INIT
 	default n
 	depends on ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
 	depends on MEMORY_HOTPLUG
+	depends on !FLATMEM
 	help
 	  Ordinarily all struct pages are initialised during early boot in a
 	  single thread. On very large machines this can take a considerable
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
index 7f7ac51d7faf..fb87923552ef 100644
--- a/mm/kasan/kasan.h
+++ b/mm/kasan/kasan.h
@@ -77,7 +77,6 @@ struct kasan_alloc_meta {
 	struct kasan_track track;
 	u32 state : 2;	/* enum kasan_state */
 	u32 alloc_size : 30;
-	u32 reserved;
 };
 
 struct qlist_node {
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index cf428d7b9a03..f6477a9dbe7a 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1302,6 +1302,8 @@ static bool mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask,
 				mem_cgroup_iter_break(memcg, iter);
 				if (chosen)
 					put_task_struct(chosen);
+				/* Set a dummy value to return "true". */
+				chosen = (void *) 1;
 				goto unlock;
 			case OOM_SCAN_OK:
 				break;
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 72698db958e7..b6d4f258cb53 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -45,6 +45,8 @@
  *
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
@@ -483,16 +485,16 @@ static inline unsigned long zs_stat_get(struct size_class *class,
 
 #ifdef CONFIG_ZSMALLOC_STAT
 
-static int __init zs_stat_init(void)
+static void __init zs_stat_init(void)
 {
-	if (!debugfs_initialized())
-		return -ENODEV;
+	if (!debugfs_initialized()) {
+		pr_warn("debugfs not available, stat dir not created\n");
+		return;
+	}
 
 	zs_stat_root = debugfs_create_dir("zsmalloc", NULL);
 	if (!zs_stat_root)
-		return -ENOMEM;
-
-	return 0;
+		pr_warn("debugfs 'zsmalloc' stat dir creation failed\n");
 }
 
 static void __exit zs_stat_exit(void)
@@ -577,8 +579,10 @@ static void zs_pool_stat_create(struct zs_pool *pool, const char *name)
 {
 	struct dentry *entry;
 
-	if (!zs_stat_root)
+	if (!zs_stat_root) {
+		pr_warn("no root stat dir, not creating <%s> stat dir\n", name);
 		return;
+	}
 
 	entry = debugfs_create_dir(name, zs_stat_root);
 	if (!entry) {
@@ -592,7 +596,8 @@ static void zs_pool_stat_create(struct zs_pool *pool, const char *name)
 	if (!entry) {
 		pr_warn("%s: debugfs file entry <%s> creation failed\n",
 				name, "classes");
-		return;
+		debugfs_remove_recursive(pool->stat_dentry);
+		pool->stat_dentry = NULL;
 	}
 }
 
@@ -602,9 +607,8 @@ static void zs_pool_stat_destroy(struct zs_pool *pool)
 }
 
 #else /* CONFIG_ZSMALLOC_STAT */
-static int __init zs_stat_init(void)
+static void __init zs_stat_init(void)
 {
-	return 0;
 }
 
 static void __exit zs_stat_exit(void)
@@ -2011,17 +2015,10 @@ static int __init zs_init(void)
 	zpool_register_driver(&zs_zpool_driver);
 #endif
 
-	ret = zs_stat_init();
-	if (ret) {
-		pr_err("zs stat initialization failed\n");
-		goto stat_fail;
-	}
+	zs_stat_init();
+
 	return 0;
 
-stat_fail:
-#ifdef CONFIG_ZPOOL
-	zpool_unregister_driver(&zs_zpool_driver);
-#endif
 notifier_fail:
 	zs_unregister_cpu_notifier();