From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 73F4CC433EF for ; Fri, 4 Mar 2022 09:35:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238369AbiCDJgl (ORCPT ); Fri, 4 Mar 2022 04:36:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53598 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237400AbiCDJfx (ORCPT ); Fri, 4 Mar 2022 04:35:53 -0500 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A0B7075603 for ; Fri, 4 Mar 2022 01:35:06 -0800 (PST) Received: from canpemm500002.china.huawei.com (unknown [172.30.72.56]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4K92dV2pXQzbcJP; Fri, 4 Mar 2022 17:30:22 +0800 (CST) Received: from huawei.com (10.175.124.27) 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 15.1.2308.21; Fri, 4 Mar 2022 17:35:04 +0800 From: Miaohe Lin To: CC: , , , , , , , , , , , , , , , , , , Subject: [PATCH 08/16] mm/migration: avoid unneeded nodemask_t initialization Date: Fri, 4 Mar 2022 17:34:01 +0800 Message-ID: <20220304093409.25829-9-linmiaohe@huawei.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20220304093409.25829-1-linmiaohe@huawei.com> References: <20220304093409.25829-1-linmiaohe@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.175.124.27] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To canpemm500002.china.huawei.com (7.192.104.244) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Avoid unneeded next_pass and this_pass initialization as they're always set before using to save possible cpu cycles when there are plenty of nodes in the system. Signed-off-by: Miaohe Lin --- mm/migrate.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/migrate.c b/mm/migrate.c index c84eec19072a..abb0c6715e1f 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2378,8 +2378,8 @@ static int establish_migrate_target(int node, nodemask_t *used, */ static void __set_migration_target_nodes(void) { - nodemask_t next_pass = NODE_MASK_NONE; - nodemask_t this_pass = NODE_MASK_NONE; + nodemask_t next_pass; + nodemask_t this_pass; nodemask_t used_targets = NODE_MASK_NONE; int node, best_distance; -- 2.23.0