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=-16.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 B8366C4338F for ; Wed, 18 Aug 2021 09:34:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9149560462 for ; Wed, 18 Aug 2021 09:34:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232877AbhHRJfQ (ORCPT ); Wed, 18 Aug 2021 05:35:16 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:31077 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232963AbhHRJ3p (ORCPT ); Wed, 18 Aug 2021 05:29:45 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1629278945; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=tok9wTM/eOgd5G8LxY5ZsW25iRLAwauiPNkTN03s15Y=; b=XVgPNxO8j+1/FD012+rLlBQ6v27+LfHNWcfs7me/mW5zVyHqT4lDpsO0/037Cw4r+J47Iw gc7P4bKT9ILiQSkP+aUgDtjaiBtj54gy6pwl4h5kWdXahq8HKLam9lCm0hluc26HMAWkd0 YQc+hS/GkhnOUCLZxHdMRW2pzZW0/2E= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-384-w4lvWBeeOgWcGsdZJ1-FiQ-1; Wed, 18 Aug 2021 05:29:04 -0400 X-MC-Unique: w4lvWBeeOgWcGsdZJ1-FiQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 05CBA18C89CC; Wed, 18 Aug 2021 09:29:03 +0000 (UTC) Received: from localhost (ovpn-8-40.pek2.redhat.com [10.72.8.40]) by smtp.corp.redhat.com (Postfix) with ESMTP id 00978100EB3D; Wed, 18 Aug 2021 09:29:01 +0000 (UTC) From: Ming Lei To: Thomas Gleixner , Jens Axboe Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, Christoph Hellwig , Ming Lei Subject: [PATCH V2 6/7] lib/group_cpus: allow to group cpus in case of !CONFIG_SMP Date: Wed, 18 Aug 2021 17:28:11 +0800 Message-Id: <20210818092812.787558-7-ming.lei@redhat.com> In-Reply-To: <20210818092812.787558-1-ming.lei@redhat.com> References: <20210818092812.787558-1-ming.lei@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Allows group_cpus_evenly() to be called in case of !CONFIG_SMP by simply assigning all CPUs into the 1st group. Signed-off-by: Ming Lei --- lib/group_cpus.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/lib/group_cpus.c b/lib/group_cpus.c index f7165b38c9d0..b34f7d309f9c 100644 --- a/lib/group_cpus.c +++ b/lib/group_cpus.c @@ -327,6 +327,7 @@ static int __group_cpus_evenly(unsigned int startgrp, unsigned int numgrps, return done; } +#ifdef CONFIG_SMP /** * group_cpus_evenly - Group all CPUs evenly per NUMA/CPU locality * @numgrps: number of groups @@ -411,4 +412,17 @@ struct cpumask *group_cpus_evenly(unsigned int numgrps) } return masks; } +#else +struct cpumask *group_cpus_evenly(unsigned int numgrps) +{ + struct cpumask *masks = kcalloc(numgrps, sizeof(*masks), GFP_KERNEL); + + if (!masks) + return NULL; + + /* assign all CPUs(cpu 0) to the 1st group only */ + cpumask_copy(&masks[0], cpu_possible_mask); + return masks; +} +#endif EXPORT_SYMBOL_GPL(group_cpus_evenly); -- 2.31.1