commit edae0c3358947f8be5ca99f762d89e0c38e1f5d5
author Tejun Heo <tj@kernel.org> Tue Aug 13 20:22:51 2013 -0400
committer Tejun Heo <tj@kernel.org> Tue Aug 13 20:22:51 2013 -0400
tree b8eefc09b48fe05e7ad069e1136e1f5b4a514d5e
parent 09a503ea3a816b285b0b402b7f785eaec0c7a7e1

cgroup: factor out kill_css()

Factor out css ref killing from cgroup_destroy_locked() into
kill_css().  We're gonna add more to the path and the factored out
function will eventually be called from other places too.

While at it, replace open coded percpu_ref_get() with css_get() for
consistency.  This shouldn't cause any functional difference as the
function is not used for root cgroups.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>