diff --git a/kernel/ns_cgroup.c b/kernel/ns_cgroup.c
index 43c2111cd54de719917c0cdc9ace9e92445f4513..78bc3fdac0d262f019d1c1c4caee95e9c26aa147 100644
--- a/kernel/ns_cgroup.c
+++ b/kernel/ns_cgroup.c
@@ -13,7 +13,6 @@
 
 struct ns_cgroup {
 	struct cgroup_subsys_state css;
-	spinlock_t lock;
 };
 
 struct cgroup_subsys ns_subsys;
@@ -84,7 +83,6 @@ static struct cgroup_subsys_state *ns_create(struct cgroup_subsys *ss,
 	ns_cgroup = kzalloc(sizeof(*ns_cgroup), GFP_KERNEL);
 	if (!ns_cgroup)
 		return ERR_PTR(-ENOMEM);
-	spin_lock_init(&ns_cgroup->lock);
 	return &ns_cgroup->css;
 }