From nobody Fri Dec 19 17:18:50 2025 Received: from mail-wm1-f46.google.com (mail-wm1-f46.google.com [209.85.128.46]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CD302284665 for ; Thu, 6 Nov 2025 16:38:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.46 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762447089; cv=none; b=KcVWCldilu9KYcVKnE9a+xYlt1vjk6/DmrSnT5cP9zaz+t66AAVNbKlhM6QFFungi982nA2VHehithKtlb5pYLfWkbltVq7nirNhKKSwbLon9HPQLE7PPYcubd59u5ZuTAYmAHywUx8S7MUXSufvBptcMeOWYB1vK5ddMYcl0X8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762447089; c=relaxed/simple; bh=uHCaSN1HJj7TSyL9maP/C6AySyYk+ApX2MMQbZ4ZLlY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=mzEzH++ArJ2h2l0QRfjb9I9/ZlU5yixPgqMw57PV+ozyxddVz3Ty/7znWbU4iKITeglnK8CsYlQlqbXpemI1/bc0tzqkYGQXIk783rrkAzpqGRNmrhyXBZzU/KWi30VyRY6as3O+B6dhoDOmmxwgmllkbjFeWODDyWJUCBWFUYQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=suse.com; spf=pass smtp.mailfrom=suse.com; dkim=pass (2048-bit key) header.d=suse.com header.i=@suse.com header.b=M7tFu/oH; arc=none smtp.client-ip=209.85.128.46 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=suse.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=suse.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=suse.com header.i=@suse.com header.b="M7tFu/oH" Received: by mail-wm1-f46.google.com with SMTP id 5b1f17b1804b1-4775ae77516so14083245e9.1 for ; Thu, 06 Nov 2025 08:38:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=google; t=1762447085; x=1763051885; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=BIW3cS3n8yzrCh58jhXvAPIZMTRPbdX12tJ5K0TKoIs=; b=M7tFu/oHqJFxzsnQB1EhtPdFbC5mxz7T/M1vlTmt4nJXIAyiafQmrrosOuXJZruzzA p4YVwZQTPuWq5N+M9pU2soWvV9p5nmdbWVq2Eix8WT7r8jKHmaXgOeM4uxZ4ZBcib15r +a+2EintvnpNwtezciOhUVo2WKyGAMNYFaE6R50v89iO+aHihjcZiKIoGEdcixYnkwj8 rc78FbPScwlbxJcC2VrIi7u5Tmc+vSDzlklTZH32xOQ9rkjgauE5d+CqvYmu4aSHY38G DaXzW22xiymbGLf1/0nZlQ0T1nHRSW8SkG8vOWNnpmnmjgPFAgzjFkbfOp+KpBC2Pjql y5qg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1762447085; x=1763051885; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=BIW3cS3n8yzrCh58jhXvAPIZMTRPbdX12tJ5K0TKoIs=; b=SqlZ7i8MGINfwnD2ht8iDfEBbBdA02WOE4sHNVh9CiW1xHa+AZ5BDO3BCL65l8xyiC vvxhAoAuVorRu9oPXp8GUfJH9X0wngzGxvJQvtMBSV0jkCRDxhslr8Tiv1Igs5U9GnoM dDEjeeAOnmNB83LeJ/8K6HfH/nvFaHDxBukG7Wuj4+nnqbGeDKhGQgPBidRpjtdRR+2l 9iPo1dgmc1PqqEfW8adWIxnXsnWE6vEofbgx3fUVh3YE8JXIXqWy3KEf75HCCcDz6oAr BROuqNscF3DawVcQcq1lTMIaNFoDA0zM+4/nx0stYLRTsvUElIamwNIEGMd6rG7ZOITw 2E6Q== X-Gm-Message-State: AOJu0YxxmdSKeGNI7DQK00+NmMQAvJDhGpk9ubjXnnIOFHXETp1PQXzy I+ICYeYFQg1k2+epjZ1if5KulDI9db2C7Ini5lGTMAwWdS1c4P2c56tR9BL2aE1gqin7r4eHctq ivC4j X-Gm-Gg: ASbGncs33FNaBKY/QvQwulBIEkTYynoPyqmplbrGrpQjEQEWP8idN/y7nL0v2lrOtHx IdH5h9l72n7ktA2UvZXJvYml4+NAQMsS664/EMZDXPI3FgRZe3MihTx60I6PryB20nsgd1m5Dwv j4XgokNkRYOi/GzYY0P6EGF2w7dTfNvvFjwlwIXhdcj7X7saak9n7gzSfv6CJgcM8YsRCWajqWb KR63ccFbAas6qiyLfs3XoDSaOu4FDp1wPTDXXQJSZXO1BcFEKjmc4LyRs+6wi62W7YXMlXqiY5n aUd3MxLEzvVjITWzS5+rmtrf19lcw/nMaVwu5KnntoStCVp/0TkkSAhATzBh7l1ZUsLA8KdpvNI v1e5F6ykCqFpdUgfW9LaiQGH2D3a1W51e2mmyLAddAsSL3u66bgNWH8jSD7yEm22LP/R7ExIjw+ 0BXEAq3a85yjowEcu48KpnHu0= X-Google-Smtp-Source: AGHT+IEjgkNrSWOVJ0pFSgXHlp3nXPxcUMJ0BCl/+QeBwIyxvF9R3B+0c4btthob/ZR/dpqpdOq8fw== X-Received: by 2002:a05:600c:310c:b0:45d:f83b:96aa with SMTP id 5b1f17b1804b1-4775cdac841mr68114705e9.7.1762447084572; Thu, 06 Nov 2025 08:38:04 -0800 (PST) Received: from localhost.localdomain ([2a00:6d43:105:c401:e307:1a37:2e76:ce91]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-477625e88fasm72581015e9.15.2025.11.06.08.38.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Nov 2025 08:38:04 -0800 (PST) From: Marco Crivellari To: linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Tejun Heo , Lai Jiangshan , Frederic Weisbecker , Sebastian Andrzej Siewior , Marco Crivellari , Michal Hocko , Herbert Xu , "David S . Miller" , Nicolas Ferre , Alexandre Belloni , Claudiu Beznea Subject: [PATCH] crypto: atmel-i2c - add WQ_PERCPU to alloc_workqueue users Date: Thu, 6 Nov 2025 17:37:58 +0100 Message-ID: <20251106163758.340886-1-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-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable 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. alloc_workqueue() treats all queues as per-CPU by default, while unbound workqueues must opt-in via WQ_UNBOUND. This default is suboptimal: most workloads benefit from unbound queues, allowing the scheduler to place worker threads where they=E2=80=99re needed= and reducing noise when CPUs are isolated. This continues the effort to refactor workqueue APIs, which began with the introduction of new workqueues and a new alloc_workqueue flag in: commit 128ea9f6ccfb ("workqueue: Add system_percpu_wq and system_dfl_wq") commit 930c2ea566af ("workqueue: Add new WQ_PERCPU flag") This change adds a new WQ_PERCPU flag to explicitly request alloc_workqueue() to be per-cpu when WQ_UNBOUND has not been specified. With the introduction of the WQ_PERCPU flag (equivalent to !WQ_UNBOUND), any alloc_workqueue() caller that doesn=E2=80=99t explicitly specify WQ_UNB= OUND must now use WQ_PERCPU. Once migration is complete, WQ_UNBOUND can be removed and unbound will become the implicit default. Suggested-by: Tejun Heo Signed-off-by: Marco Crivellari --- drivers/crypto/atmel-i2c.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/crypto/atmel-i2c.c b/drivers/crypto/atmel-i2c.c index a895e4289efa..9688d116d07e 100644 --- a/drivers/crypto/atmel-i2c.c +++ b/drivers/crypto/atmel-i2c.c @@ -402,7 +402,7 @@ EXPORT_SYMBOL(atmel_i2c_probe); =20 static int __init atmel_i2c_init(void) { - atmel_wq =3D alloc_workqueue("atmel_wq", 0, 0); + atmel_wq =3D alloc_workqueue("atmel_wq", WQ_PERCPU, 0); return atmel_wq ? 0 : -ENOMEM; } =20 --=20 2.51.1