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 2B888C7EE23 for ; Mon, 22 May 2023 04:05:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229499AbjEVEFD (ORCPT ); Mon, 22 May 2023 00:05:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34690 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229864AbjEVEE6 (ORCPT ); Mon, 22 May 2023 00:04:58 -0400 Received: from szxga03-in.huawei.com (szxga03-in.huawei.com [45.249.212.189]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D0E1BCA for ; Sun, 21 May 2023 21:04:56 -0700 (PDT) Received: from canpemm500002.china.huawei.com (unknown [172.30.72.53]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4QPkM46PxQzLmJn; Mon, 22 May 2023 12:03:12 +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; Mon, 22 May 2023 12:04:38 +0800 From: Miaohe Lin To: , , , CC: , , , , , , , Subject: [PATCH] sched/deadline: simplify dl_bw_cpus() using cpumask_weight_and() Date: Mon, 22 May 2023 19:56:05 +0800 Message-ID: <20230522115605.1238227-1-linmiaohe@huawei.com> X-Mailer: git-send-email 2.23.0 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.175.104.170] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) 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 cpumask_weight_and() can be used to count of bits both in rd->span and cpu_active_mask. No functional change intended. Signed-off-by: Miaohe Lin --- kernel/sched/deadline.c | 11 +---------- 1 file changed, 1 insertion(+), 10 deletions(-) diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index 166c3e6eae61..fe983ed7bb12 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -110,20 +110,11 @@ static inline struct dl_bw *dl_bw_of(int i) static inline int dl_bw_cpus(int i) { struct root_domain *rd = cpu_rq(i)->rd; - int cpus; RCU_LOCKDEP_WARN(!rcu_read_lock_sched_held(), "sched RCU must be held"); - if (cpumask_subset(rd->span, cpu_active_mask)) - return cpumask_weight(rd->span); - - cpus = 0; - - for_each_cpu_and(i, rd->span, cpu_active_mask) - cpus++; - - return cpus; + return cpumask_weight_and(rd->span, cpu_active_mask); } static inline unsigned long __dl_bw_capacity(const struct cpumask *mask) -- 2.27.0