cgroup: factor out cgroup_apply_control_disable() from cgroup_subtree_control_write()

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Factor out css disabling and hiding into cgroup_apply_control_disable().

* Nest subsystem walk inside child walk.  The child walk will later be
  converted to subtree walk which is a bit more expensive.

* Instead of operating on the differential masks @css_enable and
  @css_disable, simply disable or hide csses according to the current
  cgroup_control() and cgroup_ss_mask().  This leads to the same
  result and is simpler and more robust.

* This allows error handling path to share the same code.

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

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Tejun Heo 2016-03-03 09:57:59 -05:00

parent 1b9b96a12b

commit 12b3bb6af8

1 changed files with 41 additions and 33 deletions

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kernel/cgroup.c

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