cgroup: factor out cgroup_kn_lock_live() and cgroup_kn_unlock()

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cgroup_mkdir(), cgroup_rmdir() and cgroup_subtree_control_write()
share the logic to break active protection so that they can grab
cgroup_tree_mutex which nests above active protection and/or remove
self.  Factor out this logic into cgroup_kn_lock_live() and
cgroup_kn_unlock().

This patch doesn't introduce any functional changes.

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

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Tejun Heo 2014-05-13 12:19:22 -04:00

parent cfc79d5bec

commit a9746d8da7

1 changed files with 90 additions and 67 deletions

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157

kernel/cgroup.c

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