[PATCH v2] regulator: irq_helper: replace use of system_wq with system_dfl_wq

[PATCH v2] regulator: irq_helper: replace use of system_wq with system_dfl_wq

[Marco Crivellari]

Currently if a user enqueues a work item using schedule_delayed_work() the
used wq is "system_wq" (per-cpu wq) while queue_delayed_work() use
WORK_CPU_UNBOUND (used when a cpu is not specified). The same applies to
schedule_work() that is using system_wq and queue_work(), that makes use
again of WORK_CPU_UNBOUND.

This lack of consistency cannot be addressed without refactoring the API.

This continues the effort to refactor worqueue APIs, which has begun
with the change introducing new workqueues and a new alloc_workqueue flag:

commit 128ea9f6ccfb ("workqueue: Add system_percpu_wq and system_dfl_wq")
commit 930c2ea566af ("workqueue: Add new WQ_PERCPU flag")

This specific workload do not benefit from a per-cpu workqueue, so use
the default unbound workqueue (system_dfl_wq) instead.

Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
---
 drivers/regulator/irq_helpers.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/irq_helpers.c b/drivers/regulator/irq_helpers.c
index 5742faee8071..5b3cfac28667 100644
--- a/drivers/regulator/irq_helpers.c
+++ b/drivers/regulator/irq_helpers.c
@@ -146,7 +146,7 @@ static void regulator_notifier_isr_work(struct work_struct *work)
 
 reschedule:
 	if (!d->high_prio)
-		mod_delayed_work(system_wq, &h->isr_work,
+		mod_delayed_work(system_dfl_wq, &h->isr_work,
 				 msecs_to_jiffies(tmo));
 	else
 		mod_delayed_work(system_highpri_wq, &h->isr_work,
-- 
2.51.1

Re: [PATCH v2] regulator: irq_helper: replace use of system_wq with system_dfl_wq

[Mark Brown]

On Thu, 06 Nov 2025 15:29:14 +0100, Marco Crivellari wrote:
> Currently if a user enqueues a work item using schedule_delayed_work() the
> used wq is "system_wq" (per-cpu wq) while queue_delayed_work() use
> WORK_CPU_UNBOUND (used when a cpu is not specified). The same applies to
> schedule_work() that is using system_wq and queue_work(), that makes use
> again of WORK_CPU_UNBOUND.
> 
> This lack of consistency cannot be addressed without refactoring the API.
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git for-next

Thanks!

[1/1] regulator: irq_helper: replace use of system_wq with system_dfl_wq
      commit: b6f4bd64f453183954184ffbc2b89d73ed8fb135

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

Re: [PATCH v2] regulator: irq_helper: replace use of system_wq with system_dfl_wq

[Marco Crivellari]

On Fri, Nov 7, 2025 at 4:59 PM Mark Brown <broonie@kernel.org> wrote:
>[...]
>
> Applied to
>
>    https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git for-next
>
> Thanks!
>
> [1/1] regulator: irq_helper: replace use of system_wq with system_dfl_wq
>       commit: b6f4bd64f453183954184ffbc2b89d73ed8fb135

Many thanks, Mark!

-- 

Marco Crivellari

L3 Support Engineer, Technology & Product