diff --git a/mm/memcontrol-v1.h b/mm/memcontrol-v1.h
index 3bb8b3030e619bc08cb0aa076ec1ca480d1dd285..c0672e25bcdb20bb45297dd1e69309ac3c7507fd 100644
--- a/mm/memcontrol-v1.h
+++ b/mm/memcontrol-v1.h
@@ -154,8 +154,6 @@ static inline bool memcg1_charge_skmem(struct mem_cgroup *memcg, unsigned int nr
 				       gfp_t gfp_mask) { return true; }
 static inline void memcg1_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages) {}
 
-extern struct cftype memsw_files[];
-extern struct cftype mem_cgroup_legacy_files[];
 #endif	/* CONFIG_MEMCG_V1 */
 
 #endif	/* __MM_MEMCONTROL_V1_H */