As pointed out by Jarek Poplawski, the patch
[WORKQUEUE]: cancel_delayed_work: use del_timer() instead of del_timer_sync()
commit: 071b638689464c6b39407025eedd810d5b5e6f5d
was wrong, it was merged by mistake after that.
>From the changelog:
after this patch:
...
delayed_work_timer_fn->__queue_work() in progress.
The latter doesn't differ from the caller's POV,
it does make a difference if the caller calls flush_workqueue() after
cancel_delayed_work(), in that case flush_workqueue() can miss this
work_struct.
Signed-off-by: Oleg Nesterov <[email protected]>
--- t/include/linux/workqueue.h~ 2007-05-17 22:55:59.000000000 +0400
+++ t/include/linux/workqueue.h 2007-05-17 23:03:03.000000000 +0400
@@ -160,7 +160,7 @@ static inline int cancel_delayed_work(st
{
int ret;
- ret = del_timer(&work->timer);
+ ret = del_timer_sync(&work->timer);
if (ret)
work_clear_pending(&work->work);
return ret;
-
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