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[2620:137:e000::1:20]) by mx.google.com with ESMTP id x4-20020a63db44000000b0053f3b62c207si4154059pgi.767.2023.06.17.01.36.13; Sat, 17 Jun 2023 01:36:28 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=huawei.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345932AbjFQIbT (ORCPT + 99 others); Sat, 17 Jun 2023 04:31:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34024 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234669AbjFQIbQ (ORCPT ); Sat, 17 Jun 2023 04:31:16 -0400 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9DE3A10CF; Sat, 17 Jun 2023 01:31:14 -0700 (PDT) Received: from canpemm500002.china.huawei.com (unknown [172.30.72.54]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4Qjq4F2MQpzqSNm; Sat, 17 Jun 2023 16:31:09 +0800 (CST) Received: from huawei.com (10.175.104.170) by canpemm500002.china.huawei.com (7.192.104.244) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.23; Sat, 17 Jun 2023 16:31:11 +0800 From: Miaohe Lin To: , , , CC: , , Subject: [PATCH] cgroup/cpuset: remove unneeded nodes_or() in cpuset_change_task_nodemask() Date: Sat, 17 Jun 2023 16:30:43 +0800 Message-ID: <20230617083043.2065556-1-linmiaohe@huawei.com> X-Mailer: git-send-email 2.23.0 MIME-Version: 1.0 X-Originating-IP: [10.175.104.170] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To canpemm500002.china.huawei.com (7.192.104.244) X-CFilter-Loop: Reflected X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1768938262125744166?= X-GMAIL-MSGID: =?utf-8?q?1768938262125744166?= The tsk->mems_allowed is changed before calling mpol_rebind_task() and being reassigned right after it. But tsk->mems_allowed is not needed inside mpol_rebind_task(). So remove unneeded tsk->mems_allowed modify via nodes_or() here. Signed-off-by: Miaohe Lin --- kernel/cgroup/cpuset.c | 1 - 1 file changed, 1 deletion(-) diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index 58e6f18f01c1..33a429c1179f 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -1941,7 +1941,6 @@ static void cpuset_change_task_nodemask(struct task_struct *tsk, local_irq_disable(); write_seqcount_begin(&tsk->mems_allowed_seq); - nodes_or(tsk->mems_allowed, tsk->mems_allowed, *newmems); mpol_rebind_task(tsk, newmems); tsk->mems_allowed = *newmems;