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cgroup: re-use the parent pointer in cgroup_destroy_locked()

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As we already have a pointer to the parent cgroup in
cgroup_destroy_locked(), we don't need to calculate it again
to pass as an argument for cgroup1_check_for_release().

Signed-off-by: Roman Gushchin <guro@fb.com>
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: Waiman Long <longman@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: kernel-team@fb.com
Cc: linux-kernel@vger.kernel.org
This commit is contained in:
Roman Gushchin 2017-08-02 17:55:32 +01:00 committed by Tejun Heo
parent ec39225cca
commit 5a621e6c95
1 changed files with 1 additions and 1 deletions
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2
kernel/cgroup/cgroup.c
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@ -5022,7 +5022,7 @@ static int cgroup_destroy_locked(struct cgroup *cgrp)
tcgrp->nr_dying_descendants++;
}
cgroup1_check_for_release(cgroup_parent(cgrp));
cgroup1_check_for_release(parent);
/* put the base reference */
percpu_ref_kill(&cgrp->self.refcnt);