diff --git a/[refs] b/[refs]
index e9175e594576..da88a4e893ca 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: c12ddba09394c60e1120e6997794fa6ed52da884
+refs/heads/master: e638c1394010859a015a3b533ee452d768e62cea
diff --git a/trunk/include/linux/memcontrol.h b/trunk/include/linux/memcontrol.h
index 18146c980b68..a9e3b76aa884 100644
--- a/trunk/include/linux/memcontrol.h
+++ b/trunk/include/linux/memcontrol.h
@@ -75,7 +75,7 @@ int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
 {
 	struct mem_cgroup *mem;
 	rcu_read_lock();
-	mem = mem_cgroup_from_task((mm)->owner);
+	mem = mem_cgroup_from_task(rcu_dereference((mm)->owner));
 	rcu_read_unlock();
 	return cgroup == mem;
 }