diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 095c1f9..3c2a1a8 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -352,7 +352,7 @@
 };
 
 #ifdef CONFIG_MEMCG_KMEM
-static bool memcg_kmem_is_active(struct mem_cgroup *memcg)
+bool memcg_kmem_is_active(struct mem_cgroup *memcg)
 {
 	return memcg->kmemcg_id >= 0;
 }