From nobody Thu Oct 2 06:16:45 2025 Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0DF8930AAAD; Mon, 22 Sep 2025 13:17:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758547078; cv=none; b=FPPcPzz7JXTKQFJxHtK3sn4xdg8qZ5Zm0ceqXq+VY5Lq8OlLQy+/l+piHhVwWvIHNq7xSCjSvM36Gx886HLPNuFORVRZwEuF0eNEf8MXPBAGbb0vIHOtV6FECA5qgdZ8Q+YHfRifQIcATCRbcEUwzwYP7oy6RvXbCTasLhOEGz0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758547078; c=relaxed/simple; bh=1f75/jj8yXuydKD44yQ/iTFL38muEDMEqtTky3BdDB0=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=LbrJKkpipX3sKUr/cRViUCwftfn0rLH4OpmsWP7ZmvWw/xEkb+y5YfWw2BN54qUSCJhHXBvTHxvd8FJepGO7xLc5K3Rjewq5I+Qu9esqOEsRugh8UIzsVSVMq3eli7owAKuqXU26+JOcp1uSaegc7mFnyfTD2TLQ2woicK/7TNQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.163.216]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTPS id 4cVkDt04GVzYQvRl; Mon, 22 Sep 2025 21:17:50 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.75]) by mail.maildlp.com (Postfix) with ESMTP id 4BF691A187E; Mon, 22 Sep 2025 21:17:54 +0800 (CST) Received: from hulk-vt.huawei.com (unknown [10.67.174.121]) by APP2 (Coremail) with SMTP id Syh0CgCH0hZ3TNFoBhXHAQ--.54770S4; Mon, 22 Sep 2025 21:17:54 +0800 (CST) From: Chen Ridong To: longman@redhat.com, tj@kernel.org, hannes@cmpxchg.org, mkoutny@suse.com Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, lujialin4@huawei.com, chenridong@huawei.com Subject: [PATCH -next 2/3] cpuset: remove impossible warning in update_parent_effective_cpumask Date: Mon, 22 Sep 2025 13:02:32 +0000 Message-Id: <20250922130233.3237521-3-chenridong@huaweicloud.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250922130233.3237521-1-chenridong@huaweicloud.com> References: <20250922130233.3237521-1-chenridong@huaweicloud.com> 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 X-CM-TRANSID: Syh0CgCH0hZ3TNFoBhXHAQ--.54770S4 X-Coremail-Antispam: 1UD129KBjvdXoW7Gw47Zr48GryDXFy3Jw1DKFg_yoWfCwc_Zw 40kw1jgr95AryIq3WYkanaqrWvk3WrAF1vy3Z0ya1YyF1jywn7Xwn09rn8trn8Zw1xZrnx ur93GFWvvFsrXjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbqkYFVCjjxCrM7AC8VAFwI0_Wr0E3s1l1xkIjI8I6I8E6xAIw20E Y4v20xvaj40_Wr0E3s1l1IIY67AEw4v_Jr0_Jr4l82xGYIkIc2x26280x7IE14v26r15M2 8IrcIa0xkI8VCY1x0267AKxVW8JVW5JwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK 021l84ACjcxK6xIIjxv20xvE14v26F1j6w1UM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r 4UJVWxJr1l84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_ GcCE3s1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx 0E2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7xkEbVWU JVW8JwACjcxG0xvY0x0EwIxGrwCY1x0262kKe7AKxVWUAVWUtwCF04k20xvY0x0EwIxGrw CF54CYxVCY1x0262kKe7AKxVWUAVWUtwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02 F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GF ylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7Cj xVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r 1j6r4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x07jY LvtUUUUU= X-CM-SenderInfo: hfkh02xlgr0w46kxt4xhlfz01xgou0bp/ Content-Type: text/plain; charset="utf-8" From: Chen Ridong If the parent is not a valid partition, an error will be returned before any partition update command is processed. This means the WARN_ON_ONCE(!is_partition_valid(parent)) can never be triggered, so it is safe to remove. Signed-off-by: Chen Ridong Acked-by: Waiman Long --- kernel/cgroup/cpuset.c | 1 - 1 file changed, 1 deletion(-) diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index 20dface3c3e0..196645b38b24 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -1923,7 +1923,6 @@ static int update_parent_effective_cpumask(struct cpu= set *cs, int cmd, * A partition error happens when parent has tasks and all * its effective CPUs will have to be distributed out. */ - WARN_ON_ONCE(!is_partition_valid(parent)); if (nocpu) { part_error =3D PERR_NOCPUS; if (is_partition_valid(cs)) --=20 2.34.1