[PATCH][BUGFIX] memcg: fix memory.numa_stat file permission

[KAMEZAWA Hiroyuki]

 commit 406eb0c9ba765eb066406fd5ce9d5e2b169a4d5a adds memory.numa_stat
 file for memory cgroup. But it's file permission is wrong.

[kamezawa@bluextal linux-2.6]$ ls -l /cgroup/memory/A/memory.numa_stat
---------- 1 root root 0 Jun  9 18:36 /cgroup/memory/A/memory.numa_stat

This patch fixes the permission as

[root@bluextal kamezawa]# ls -l /cgroup/memory/A/memory.numa_stat
-r--r--r-- 1 root root 0 Jun 10 16:49 /cgroup/memory/A/memory.numa_stat

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
---
 mm/memcontrol.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index bd9052a..ce05835 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4640,6 +4640,7 @@ static struct cftype mem_cgroup_files[] = {
 	{
 		.name = "numa_stat",
 		.open = mem_control_numa_stat_open,
+		.mode = S_IRUGO,
 	},
 #endif
 };
-- 
1.7.4.1


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