diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 1947218..338d62a 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -6753,6 +6753,12 @@
 	return ret;
 }
 
+static int mem_cgroup_allow_attach(struct cgroup *cgroup,
+				   struct cgroup_taskset *tset)
+{
+	return subsys_cgroup_allow_attach(cgroup, tset);
+}
+
 static void mem_cgroup_cancel_attach(struct cgroup *cgroup,
 				     struct cgroup_taskset *tset)
 {
@@ -6921,6 +6927,11 @@
 {
 	return 0;
 }
+static int mem_cgroup_allow_attach(struct cgroup *cgroup,
+				   struct cgroup_taskset *tset)
+{
+	return 0;
+}
 static void mem_cgroup_cancel_attach(struct cgroup *cgroup,
 				     struct cgroup_taskset *tset)
 {
@@ -6956,6 +6967,7 @@
 	.can_attach = mem_cgroup_can_attach,
 	.cancel_attach = mem_cgroup_cancel_attach,
 	.attach = mem_cgroup_move_task,
+	.allow_attach = mem_cgroup_allow_attach,
 	.bind = mem_cgroup_bind,
 	.base_cftypes = mem_cgroup_files,
 	.early_init = 0,