diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index b85814a..fb7f1ca 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -582,7 +582,7 @@ static struct kmem_cache *kmem_cache_dup(struct mem_cgroup *memcg,
 	return new;
 }
 
-struct ida cache_types;
+static struct ida cache_types;
 
 void memcg_register_cache(struct mem_cgroup *memcg, struct kmem_cache *cachep)
 {
@@ -752,7 +752,7 @@ static LIST_HEAD(create_queue);
  * they will just get queued again next time someone tries to make a slab
  * allocation for them.
  */
-void memcg_flush_cache_create_queue(void)
+static void memcg_flush_cache_create_queue(void)
 {
 	struct create_work *cw, *tmp;
 	unsigned long flags;