diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index c8e9229..4f89f67 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5046,7 +5046,7 @@
 static int mem_cgroup_allow_attach(struct cgroup_subsys_state *css,
 				   struct cgroup_taskset *tset)
 {
-	return subsys_cgroup_allow_attach(css->cgroup, tset);
+	return subsys_cgroup_allow_attach(css, tset);
 }
 
 static void mem_cgroup_cancel_attach(struct cgroup_subsys_state *css,