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 A57C6C433F5 for ; Sun, 23 Jan 2022 18:43:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229955AbiAWSnf (ORCPT ); Sun, 23 Jan 2022 13:43:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54110 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240003AbiAWSmT (ORCPT ); Sun, 23 Jan 2022 13:42:19 -0500 Received: from mail-pl1-x632.google.com (mail-pl1-x632.google.com [IPv6:2607:f8b0:4864:20::632]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4CAB6C061778 for ; Sun, 23 Jan 2022 10:42:19 -0800 (PST) Received: by mail-pl1-x632.google.com with SMTP id e8so13482292plh.8 for ; Sun, 23 Jan 2022 10:42:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=JZIbGsK4fO2MmYeZQFtgL2Ya3fsLijV0bZeyyLWVcBo=; b=aUu0ISOJcNHam1D3Deq4AyVkQoVeIW2t7/+xoxukqRlijxKAKMOj78cgt43a/ei4O1 0qBwFjn+P6QLJr2+wKvS0EcKSrQg6mt4PFWodNwqKDPeWfCi7wYI9gfBVe+HOIF5Zemp NPKMnKGkp9WLy3q9OJBIgUBz1KG4/Z7f9evOvF/91Tn1lI8xKoTxnDJN/Z2rWXDXZUem IxaPj5p1F0DqYX3yqlJtl6mqNMsfUy+eDzlRKccIkzih5UbyroeukBtDgkxOfC53IOj/ EBud2UhpLrJCkoFjjwbO78ukwiewlbuiEN7ns5yFjwfeHMFIpRAS9HSkDzA9klQeap9d TqqQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=JZIbGsK4fO2MmYeZQFtgL2Ya3fsLijV0bZeyyLWVcBo=; b=2iOlMzA3a7PG/P3ub2yI/178aETmYaKxUAPGqiLdVIFNkc9dptabWW5GwQueP74lcb 1z4y+bvpDEnHGvAdgpkIZhKFcW3nHQNaHoVn97qeQi4GN5AN3KLe/raNdW+f0FHf3LlS 41hFeZlZD4zzngnCJ6cvnSFwTZlVJtWSkKto1PyVRh4Pocb5yGElPbymBbFbrFB3KqpD neWNej56RNXmFtYRaWjr8KFxPSJmRH/Us7uJFeyjhDf0qInlb+UfgGiT2dkA8S5IR8Jr tEaklXD3DQTQgwQnl1hlG4nQzyD8NIYjXB6GllkJLbFtsDUsXIoEEtKVrGLJLSKzaNwC HzVA== X-Gm-Message-State: AOAM530NWWBLAxfJFNnySgVmUA0M2aLvLPZhYM1uIZGaZCqEjO2yIDPu nGpwYvn56BJYcsfT5I4wqT4= X-Google-Smtp-Source: ABdhPJxZyVaSdm8qfd0Lxd4g15OkNroNLz6HGWoPVFx+Xofe/zxCaNgOOfWpiOJzDf8cAIJOPuRTJw== X-Received: by 2002:a17:902:f243:b0:14b:1f32:e923 with SMTP id j3-20020a170902f24300b0014b1f32e923mr6194383plc.121.1642963338768; Sun, 23 Jan 2022 10:42:18 -0800 (PST) Received: from localhost (searspoint.nvidia.com. [216.228.112.21]) by smtp.gmail.com with ESMTPSA id s2sm170778pgq.38.2022.01.23.10.42.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 23 Jan 2022 10:42:18 -0800 (PST) From: Yury Norov To: Yury Norov , Andy Shevchenko , Rasmus Villemoes , Andrew Morton , =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= , Greg Kroah-Hartman , Peter Zijlstra , David Laight , Joe Perches , Dennis Zhou , Emil Renner Berthing , Nicholas Piggin , Matti Vaittinen , Alexey Klimov , linux-kernel@vger.kernel.org, Thomas Gleixner Subject: [PATCH 48/54] kernel/time: replace cpumask_weight with cpumask_weight_eq where appropriate Date: Sun, 23 Jan 2022 10:39:19 -0800 Message-Id: <20220123183925.1052919-49-yury.norov@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220123183925.1052919-1-yury.norov@gmail.com> References: <20220123183925.1052919-1-yury.norov@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tick_cleanup_dead_cpu() calls cpumask_weight() to compare the weight of cpumask with a given number. We can do it more efficiently with cpumask_weight_eq() because conditional cpumask_weight may stop traversing the cpumask earlier, as soon as condition is met. Signed-off-by: Yury Norov --- kernel/time/clockevents.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c index 003ccf338d20..32d6629a55b2 100644 --- a/kernel/time/clockevents.c +++ b/kernel/time/clockevents.c @@ -648,7 +648,7 @@ void tick_cleanup_dead_cpu(int cpu) */ list_for_each_entry_safe(dev, tmp, &clockevent_devices, list) { if (cpumask_test_cpu(cpu, dev->cpumask) && - cpumask_weight(dev->cpumask) == 1 && + cpumask_weight_eq(dev->cpumask, 1) && !tick_is_broadcast_device(dev)) { BUG_ON(!clockevent_state_detached(dev)); list_del(&dev->list); -- 2.30.2