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Wed, 05 Nov 2025 08:08:28 -0800 (PST) Received: from localhost.localdomain ([2a00:6d43:105:c401:e307:1a37:2e76:ce91]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4775cdcc552sm58255715e9.6.2025.11.05.08.08.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Nov 2025 08:08:28 -0800 (PST) From: Marco Crivellari To: linux-kernel@vger.kernel.org, linux-edac@vger.kernel.org Cc: Tejun Heo , Lai Jiangshan , Frederic Weisbecker , Sebastian Andrzej Siewior , Marco Crivellari , Michal Hocko , Tony Luck , Borislav Petkov Subject: [PATCH] RAS/CEC: replace use of system_wq with system_percpu_wq Date: Wed, 5 Nov 2025 17:08:19 +0100 Message-ID: <20251105160819.302988-1-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") Replace system_wq with system_percpu_wq, keeping the old behavior. The old wq (system_wq) will be kept for a few release cycles. Suggested-by: Tejun Heo Signed-off-by: Marco Crivellari --- drivers/ras/cec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/ras/cec.c b/drivers/ras/cec.c index e440b15fbabc..15f7f043c8ef 100644 --- a/drivers/ras/cec.c +++ b/drivers/ras/cec.c @@ -166,7 +166,7 @@ static void cec_mod_work(unsigned long interval) unsigned long iv; =20 iv =3D interval * HZ; - mod_delayed_work(system_wq, &cec_work, round_jiffies(iv)); + mod_delayed_work(system_percpu_wq, &cec_work, round_jiffies(iv)); } =20 static void cec_work_fn(struct work_struct *work) --=20 2.51.1