Merge branch 'akpm' (patches from Andrew)

Merge misc updates from Andrew Morton:

 - a few misc things

 - ocfs2 updates

 - most of MM

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (159 commits)
  tools/testing/selftests/proc/proc-self-syscall.c: remove duplicate include
  proc: more robust bulk read test
  proc: test /proc/*/maps, smaps, smaps_rollup, statm
  proc: use seq_puts() everywhere
  proc: read kernel cpu stat pointer once
  proc: remove unused argument in proc_pid_lookup()
  fs/proc/thread_self.c: code cleanup for proc_setup_thread_self()
  fs/proc/self.c: code cleanup for proc_setup_self()
  proc: return exit code 4 for skipped tests
  mm,mremap: bail out earlier in mremap_to under map pressure
  mm/sparse: fix a bad comparison
  mm/memory.c: do_fault: avoid usage of stale vm_area_struct
  writeback: fix inode cgroup switching comment
  mm/huge_memory.c: fix "orig_pud" set but not used
  mm/hotplug: fix an imbalance with DEBUG_PAGEALLOC
  mm/memcontrol.c: fix bad line in comment
  mm/cma.c: cma_declare_contiguous: correct err handling
  mm/page_ext.c: fix an imbalance with kmemleak
  mm/compaction: pass pgdat to too_many_isolated() instead of zone
  mm: remove zone_lru_lock() function, access ->lru_lock directly
  ...

1 files changed, 4 insertions, 7 deletions

diff --git a/mm/cma_debug.c b/mm/cma_debug.c
index ad6723e9d110..8d7b2fd52225 100644
--- a/mm/cma_debug.c
+++ b/mm/cma_debug.c
@@ -21,8 +21,6 @@ struct cma_mem {
         unsigned long n;
 };
 
-static struct dentry *cma_debugfs_root;
-
 static int cma_debugfs_get(void *data, u64 *val)
 {
         unsigned long *p = data;
@@ -162,7 +160,7 @@ static int cma_alloc_write(void *data, u64 val)
 }
 DEFINE_SIMPLE_ATTRIBUTE(cma_alloc_fops, NULL, cma_alloc_write, "%llu\n");
 
-static void cma_debugfs_add_one(struct cma *cma, int idx)
+static void cma_debugfs_add_one(struct cma *cma, struct dentry *root_dentry)
 {
         struct dentry *tmp;
         char name[16];
@@ -170,7 +168,7 @@ static void cma_debugfs_add_one(struct cma *cma, int idx)
 
         scnprintf(name, sizeof(name), "cma-%s", cma->name);
 
-        tmp = debugfs_create_dir(name, cma_debugfs_root);
+        tmp = debugfs_create_dir(name, root_dentry);
 
         debugfs_create_file("alloc", 0200, tmp, cma, &cma_alloc_fops);
         debugfs_create_file("free", 0200, tmp, cma, &cma_free_fops);
@@ -188,14 +186,13 @@ static void cma_debugfs_add_one(struct cma *cma, int idx)
 
 static int __init cma_debugfs_init(void)
 {
+        struct dentry *cma_debugfs_root;
         int i;
 
         cma_debugfs_root = debugfs_create_dir("cma", NULL);
-        if (!cma_debugfs_root)
-                return -ENOMEM;
 
         for (i = 0; i < cma_area_count; i++)
-                cma_debugfs_add_one(&cma_areas[i], i);
+                cma_debugfs_add_one(&cma_areas[i], cma_debugfs_root);
 
         return 0;
 }