On Thu, Jun 16, 2016 at 01:17:25PM +0200, Petr Mladek wrote:

kthread_flush_worker() returns when the currently queued works are proceed.
But some other works might have been queued in the meantime.

This patch adds kthread_drain_worker() that is inspired by
drain_workqueue(). It returns when the queue is completely
empty and warns when it takes too long.

The initial implementation does not block queuing new works when
draining. It makes things much easier. The blocking would be useful
to debug potential problems but it is not clear if it is worth
the complication at the moment.

Signed-off-by: Petr Mladek <pmladek@suse.com>

Acked-by: Tejun Heo <tj@kernel.org>

Thanks.

-- 
tejun

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