Re: [PATCH wq/for-7.4-fixes] workqueue: Fix drain_workqueue() missing work items chained across pwqs

[Tejun Heo]

Applied to wq/for-7.4-fixes with the following tag added:

  Reviewed-by: Breno Leitao <leitao@xxxxxxxxxx>

With this patch, a work item that keeps re-queueing itself forever
makes drain_workqueue() loop forever. The current code can escape that
through this race, but the escape still trips the WARN in
destroy_workqueue() and leaks the workqueue.

Thanks.

--
tejun