diff options
| author | Johannes Weiner <[email protected]> | 2016-07-26 15:27:01 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2016-07-26 16:19:19 -0700 |
| commit | cb773df88a737d7d7e05ca7ca516414d3fcdcab8 (patch) | |
| tree | c5115d320c993dbfb26f3948460df3c6d4720e27 | |
| parent | 1fe4d021acbc356723818a633fe0a10c59c2a4c1 (diff) | |
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.
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Johannes Weiner <[email protected]>
Cc: Vladimir Davydov <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Nikolay Borisov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | kernel/cgroup.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 3108150e47b1..fa943843a32f 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -6166,7 +6166,7 @@ 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); } /** |