Commit d6ccc55e authored Jun 17, 2016 by Johannes Weiner Committed by Tejun Heo Jun 17, 2016

cgroup: remove unnecessary 0 check from css_from_id()



css_idr allocation starts at 1, so index 0 will never point to an
item. css_from_id() currently filters that before asking idr_find(),
but idr_find() would also just return NULL, so this is not needed.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Tejun Heo <tj@kernel.org>

parent 8c8a5502

kernel/cgroup.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -6162,7 +6162,7 @@ struct cgroup_subsys_state css_tryget_online_from_dir(struct dentry dentry,
		struct cgroup_subsys_state css_from_id(int id, struct cgroup_subsys ss)
		{
		WARN_ON_ONCE(!rcu_read_lock_held());
		return id > 0 ? idr_find(&ss->css_idr, id) : NULL;
		return idr_find(&ss->css_idr, id);
		}

		/**