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Wed, 05 Nov 2025 02:43:41 -0800 (PST) Received: from localhost.localdomain ([2a00:6d43:105:c401:e307:1a37:2e76:ce91]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-429dc1f5a7fsm9976206f8f.24.2025.11.05.02.43.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Nov 2025 02:43:41 -0800 (PST) From: Marco Crivellari To: linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org Cc: Tejun Heo , Lai Jiangshan , Frederic Weisbecker , Sebastian Andrzej Siewior , Marco Crivellari , Michal Hocko , Marius Cristea , Jonathan Cameron Subject: [PATCH] iio/adc/pac1934: replace use of system_wq with system_percpu_wq Date: Wed, 5 Nov 2025 11:43:30 +0100 Message-ID: <20251105104330.111057-1-marco.crivellari@suse.com> X-Mailer: git-send-email 2.51.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 patch 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") system_percpu_wq replaced system_wq, so change the wq in iio/adc/pac1934. The old wq (system_wq) will be kept for a few release cycles. Suggested-by: Tejun Heo Signed-off-by: Marco Crivellari --- drivers/iio/adc/pac1934.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/adc/pac1934.c b/drivers/iio/adc/pac1934.c index 48df16509260..ec96bb0f2ed6 100644 --- a/drivers/iio/adc/pac1934.c +++ b/drivers/iio/adc/pac1934.c @@ -768,7 +768,7 @@ static int pac1934_retrieve_data(struct pac1934_chip_in= fo *info, * Re-schedule the work for the read registers on timeout * (to prevent chip registers saturation) */ - mod_delayed_work(system_wq, &info->work_chip_rfsh, + mod_delayed_work(system_percpu_wq, &info->work_chip_rfsh, msecs_to_jiffies(PAC1934_MAX_RFSH_LIMIT_MS)); } =20 --=20 2.51.1