diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 54b3908..ce27351 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1974,7 +1974,6 @@
 			ss->attach(cgrp, &tset);
 	}
 
-	synchronize_rcu();
 out:
 	if (retval) {
 		for_each_subsys(root, ss) {
@@ -2143,7 +2142,6 @@
 	/*
 	 * step 5: success! and cleanup
 	 */
-	synchronize_rcu();
 	retval = 0;
 out_put_css_set_refs:
 	if (retval) {