cpuset: lock vs unlock typo

This will deadlock instead of unlocking.

Fixes: f73eae8d8384 ('cpuset: simplify cpuset_node_allowed API')
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Acked-by: NVladimir Davydov <vdavydov@parallels.com>
Signed-off-by: NTejun Heo <tj@kernel.org>

kernel/cpuset.c

@@ -1992,7 +1992,7 @@ static int cpuset_css_online(struct cgroup_subsys_state *css)
 	spin_lock_irq(&callback_lock);
 	cs->mems_allowed = parent->mems_allowed;
 	cpumask_copy(cs->cpus_allowed, parent->cpus_allowed);
-	spin_lock_irq(&callback_lock);
+	spin_unlock_irq(&callback_lock);
 out_unlock:
 	mutex_unlock(&cpuset_mutex);
 	return 0;