Tejun Heo 30ae2fc0a7 workqueue: Minor follow-ups to the rescuer destruction change ...

* Now that wq->rescuer may be cleared while rescuer is still there,
  switch show_pwq() debug printout to test worker->rescue_wq to
  identify rescuers intead of testing wq->rescuer.

* Update comment on ->rescuer locking.

Signed-off-by: Tejun Heo <tj@kernel.org>
Suggested-by: Lai Jiangshan <jiangshanlai@gmail.com>

2019-09-20 14:09:14 -07:00

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