mm/memcontrol.c: remove unnecessary 'break' in mem_cgroup_read()

Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 4dc9709..6110293 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3902,7 +3902,6 @@
 		break;
 	default:
 		BUG();
-		break;
 	}
 	return val;
 }