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 X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2844DC1B08C for ; Thu, 15 Jul 2021 12:29:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F35C2613BC for ; Thu, 15 Jul 2021 12:29:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237249AbhGOMb5 (ORCPT ); Thu, 15 Jul 2021 08:31:57 -0400 Received: from szxga03-in.huawei.com ([45.249.212.189]:11317 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231147AbhGOMbz (ORCPT ); Thu, 15 Jul 2021 08:31:55 -0400 Received: from dggeme703-chm.china.huawei.com (unknown [172.30.72.56]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4GQYTV60zPz7tgF; Thu, 15 Jul 2021 20:24:30 +0800 (CST) Received: from huawei.com (10.175.124.27) by dggeme703-chm.china.huawei.com (10.1.199.99) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Thu, 15 Jul 2021 20:29:00 +0800 From: Miaohe Lin To: CC: , , Subject: [PATCH 2/3] mm/vmstat: simplify the array size calculation Date: Thu, 15 Jul 2021 20:29:10 +0800 Message-ID: <20210715122911.15700-3-linmiaohe@huawei.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20210715122911.15700-1-linmiaohe@huawei.com> References: <20210715122911.15700-1-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: dggems706-chm.china.huawei.com (10.3.19.183) To dggeme703-chm.china.huawei.com (10.1.199.99) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We can replace the array_num * sizeof(array[0]) with sizeof(array) to simplify the code. Signed-off-by: Miaohe Lin --- mm/vmstat.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/mm/vmstat.c b/mm/vmstat.c index 57e8e7fda7aa..76aef9510f6d 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1889,17 +1889,15 @@ static bool need_update(int cpu) /* * The fast way of checking if there are any vmstat diffs. */ - if (memchr_inv(pzstats->vm_stat_diff, 0, NR_VM_ZONE_STAT_ITEMS * - sizeof(pzstats->vm_stat_diff[0]))) + if (memchr_inv(pzstats->vm_stat_diff, 0, sizeof(pzstats->vm_stat_diff))) return true; if (last_pgdat == zone->zone_pgdat) continue; last_pgdat = zone->zone_pgdat; n = per_cpu_ptr(zone->zone_pgdat->per_cpu_nodestats, cpu); - if (memchr_inv(n->vm_node_stat_diff, 0, NR_VM_NODE_STAT_ITEMS * - sizeof(n->vm_node_stat_diff[0]))) - return true; + if (memchr_inv(n->vm_node_stat_diff, 0, sizeof(n->vm_node_stat_diff))) + return true; } return false; } -- 2.23.0