Merge branch 'for-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
Pull workqueue updates from Tejun Heo:
- The code around workqueue scheduler hooks got reorganized early 2019
which unfortuately introdued a couple subtle and rare race conditions
where preemption can mangle internal workqueue state triggering a
WARN and possibly causing a stall or at least delay in execution.
Frederic fixed both early December and the fixes were sitting in
for-5.16-fixes which I forgot to push. They are here now. I'll
forward them to stable after they land.
- The scheduler hook reorganization has more implicatoins for workqueue
code in that the hooks are now more strictly synchronized and thus
the interacting operations can become more straight-forward.
Lai is in the process of simplifying workqueue code and this pull
request contains some of the patches.
* 'for-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
workqueue: Remove the cacheline_aligned for nr_running
workqueue: Move the code of waking a worker up in unbind_workers()
workqueue: Remove schedule() in unbind_workers()
workqueue: Remove outdated comment about exceptional workers in unbind_workers()
workqueue: Remove the advanced kicking of the idle workers in rebind_workers()
workqueue: Remove the outdated comment before wq_worker_sleeping()
workqueue: Fix unbind_workers() VS wq_worker_sleeping() race
workqueue: Fix unbind_workers() VS wq_worker_running() race
workqueue: Upgrade queue_work_on() comment