Merge branch 'akpm' (patches from Andrew Morton)

Merge misc fixes from Andrew Morton:
 "A few hotfixes and various leftovers which were awaiting other merges.

  Mainly movement of zram into mm/"

* emailed patches fron Andrew Morton <akpm@linux-foundation.org>: (25 commits)
  memcg: fix mutex not unlocked on memcg_create_kmem_cache fail path
  Documentation/filesystems/vfs.txt: update file_operations documentation
  mm, oom: base root bonus on current usage
  mm: don't lose the SOFT_DIRTY flag on mprotect
  mm/slub.c: fix page->_count corruption (again)
  mm/mempolicy.c: fix mempolicy printing in numa_maps
  zram: remove zram->lock in read path and change it with mutex
  zram: remove workqueue for freeing removed pending slot
  zram: introduce zram->tb_lock
  zram: use atomic operation for stat
  zram: remove unnecessary free
  zram: delay pending free request in read path
  zram: fix race between reset and flushing pending work
  zsmalloc: add maintainers
  zram: add zram maintainers
  zsmalloc: add copyright
  zram: add copyright
  zram: remove old private project comment
  zram: promote zram from staging
  zsmalloc: move it under mm
  ...

4 files changed, 59 insertions, 7 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 0375654adb28..8678c4322b44 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -95,10 +95,7 @@ enum rq_cmd_type_bits {
  * as well!
  */
 struct request {
-        union {
-                struct list_head queuelist;
-                struct llist_node ll_list;
-        };
+        struct list_head queuelist;
         union {
                 struct call_single_data csd;
                 struct work_struct mq_flush_data;
diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h
index b388223bd4a9..db51fe4fe317 100644
--- a/include/linux/bootmem.h
+++ b/include/linux/bootmem.h
@@ -264,7 +264,7 @@ static inline void * __init memblock_virt_alloc_low(
 {
         if (!align)
                 align = SMP_CACHE_BYTES;
-        return __alloc_bootmem_low(size, align, BOOTMEM_LOW_LIMIT);
+        return __alloc_bootmem_low(size, align, 0);
 }
 
 static inline void * __init memblock_virt_alloc_low_nopanic(
@@ -272,7 +272,7 @@ static inline void * __init memblock_virt_alloc_low_nopanic(
 {
         if (!align)
                 align = SMP_CACHE_BYTES;
-        return __alloc_bootmem_low_nopanic(size, align, BOOTMEM_LOW_LIMIT);
+        return __alloc_bootmem_low_nopanic(size, align, 0);
 }
 
 static inline void * __init memblock_virt_alloc_from_nopanic(
diff --git a/include/linux/smp.h b/include/linux/smp.h
index 5da22ee42e16..3834f43f9993 100644
--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -11,12 +11,16 @@
 #include <linux/list.h>
 #include <linux/cpumask.h>
 #include <linux/init.h>
+#include <linux/llist.h>
 
 extern void cpu_idle(void);
 
 typedef void (*smp_call_func_t)(void *info);
 struct call_single_data {
-        struct list_head list;
+        union {
+                struct list_head list;
+                struct llist_node llist;
+        };
         smp_call_func_t func;
         void *info;
         u16 flags;
diff --git a/include/linux/zsmalloc.h b/include/linux/zsmalloc.h
new file mode 100644
index 000000000000..e44d634e7fb7
--- /dev/null
+++ b/include/linux/zsmalloc.h
@@ -0,0 +1,51 @@
+/*
+ * zsmalloc memory allocator
+ *
+ * Copyright (C) 2011  Nitin Gupta
+ * Copyright (C) 2012, 2013 Minchan Kim
+ *
+ * This code is released using a dual license strategy: BSD/GPL
+ * You can choose the license that better fits your requirements.
+ *
+ * Released under the terms of 3-clause BSD License
+ * Released under the terms of GNU General Public License Version 2.0
+ */
+
+#ifndef _ZS_MALLOC_H_
+#define _ZS_MALLOC_H_
+
+#include <linux/types.h>
+
+/*
+ * zsmalloc mapping modes
+ *
+ * NOTE: These only make a difference when a mapped object spans pages.
+ * They also have no effect when PGTABLE_MAPPING is selected.
+ */
+enum zs_mapmode {
+        ZS_MM_RW, /* normal read-write mapping */
+        ZS_MM_RO, /* read-only (no copy-out at unmap time) */
+        ZS_MM_WO /* write-only (no copy-in at map time) */
+        /*
+         * NOTE: ZS_MM_WO should only be used for initializing new
+         * (uninitialized) allocations.  Partial writes to already
+         * initialized allocations should use ZS_MM_RW to preserve the
+         * existing data.
+         */
+};
+
+struct zs_pool;
+
+struct zs_pool *zs_create_pool(gfp_t flags);
+void zs_destroy_pool(struct zs_pool *pool);
+
+unsigned long zs_malloc(struct zs_pool *pool, size_t size);
+void zs_free(struct zs_pool *pool, unsigned long obj);
+
+void *zs_map_object(struct zs_pool *pool, unsigned long handle,
+                        enum zs_mapmode mm);
+void zs_unmap_object(struct zs_pool *pool, unsigned long handle);
+
+u64 zs_get_total_size_bytes(struct zs_pool *pool);
+
+#endif