+ cgroups-use-hierarchy-mutex-in-creation-failure-path.patch added to -mm tree

+ cgroups-use-hierarchy-mutex-in-creation-failure-path.patch added to -mm tree

[akpm]

The patch titled
     cgroups: use hierarchy mutex in creation failure path
has been added to the -mm tree.  Its filename is
     cgroups-use-hierarchy-mutex-in-creation-failure-path.patch

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------------------------------------------------------
Subject: cgroups: use hierarchy mutex in creation failure path
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>

Now, cgrp->sibling is handled under hierarchy mutex.
error route should do so, too.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Acked-by Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 kernel/cgroup.c |    2 ++
 1 file changed, 2 insertions(+)

diff -puN kernel/cgroup.c~cgroups-use-hierarchy-mutex-in-creation-failure-path kernel/cgroup.c
--- a/kernel/cgroup.c~cgroups-use-hierarchy-mutex-in-creation-failure-path
+++ a/kernel/cgroup.c
@@ -2434,7 +2434,9 @@ static long cgroup_create(struct cgroup 
 
  err_remove:
 
+	cgroup_lock_hierarchy(root);
 	list_del(&cgrp->sibling);
+	cgroup_unlock_hierarchy(root);
 	root->number_of_cgroups--;
 
  err_destroy:
_

Patches currently in -mm which might be from kamezawa.hiroyu@jp.fujitsu.com are

origin.patch
cgroups-use-hierarchy-mutex-in-creation-failure-path.patch
memcg-get-put-parents-at-create-free.patch
proc-pid-maps-dont-show-pgoff-of-pure-anon-vmas.patch
proc-pid-maps-dont-show-pgoff-of-pure-anon-vmas-checkpatch-fixes.patch