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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2009-04-21 15:24:41 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-21 16:41:48 -0400
commite638c1394010859a015a3b533ee452d768e62cea (patch)
treeb8db247c01e86835afe6b0d6cd897543e76c23d0
parentc12ddba09394c60e1120e6997794fa6ed52da884 (diff)
memcg: use rcu_dereference to access mm->owner
mm->owner should be accessed with rcu_dereference(). Reported-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/memcontrol.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 18146c980b68..a9e3b76aa884 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -75,7 +75,7 @@ int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
75{ 75{
76 struct mem_cgroup *mem; 76 struct mem_cgroup *mem;
77 rcu_read_lock(); 77 rcu_read_lock();
78 mem = mem_cgroup_from_task((mm)->owner); 78 mem = mem_cgroup_from_task(rcu_dereference((mm)->owner));
79 rcu_read_unlock(); 79 rcu_read_unlock();
80 return cgroup == mem; 80 return cgroup == mem;
81} 81}