diff --git a/mm/slab_common.c b/mm/slab_common.c
index bde04a6..5ce4fae 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -500,7 +500,7 @@
 			     struct kmem_cache *root_cache)
 {
 	static char memcg_name_buf[NAME_MAX + 1]; /* protected by slab_mutex */
-	struct cgroup_subsys_state *css = mem_cgroup_css(memcg);
+	struct cgroup_subsys_state *css = &memcg->css;
 	struct memcg_cache_array *arr;
 	struct kmem_cache *s = NULL;
 	char *cache_name;