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=-17.2 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 E38A3C636CB for ; Mon, 19 Jul 2021 09:58:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D010C6108B for ; Mon, 19 Jul 2021 09:58:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236162AbhGSJRt (ORCPT ); Mon, 19 Jul 2021 05:17:49 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:59079 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236176AbhGSJRr (ORCPT ); Mon, 19 Jul 2021 05:17:47 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1626688707; 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=mkVnOqhWBDK86TEgwnT4AMVMZ/AmzLG4Gwzg6EJEcmQ=; b=exvuA7SLy1HEGbKgVC1JSOpFYXdsOgi33FGALWdEvrpElpAfIlx8YBJl8Cgy9Z6g0yse+r A5sLyIvK8fmIkxkYGutDtW4T2GGTLFHjkpFd3GDnnduiJClxJB9kqXn2YlXXh2hbm/+gk4 qadOHY1QQnGGEtkmV+okGeL9BOru7NU= 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-484-D4-NEdTWOj6oDMywRkGLRQ-1; Mon, 19 Jul 2021 05:58:23 -0400 X-MC-Unique: D4-NEdTWOj6oDMywRkGLRQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 7D70B100C612; Mon, 19 Jul 2021 09:58:22 +0000 (UTC) Received: from localhost (ovpn-12-118.pek2.redhat.com [10.72.12.118]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3368060E1C; Mon, 19 Jul 2021 09:58:17 +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: [RFC PATCH 6/7] lib/group_cpus: allow to group cpus in case of !CONFIG_SMP Date: Mon, 19 Jul 2021 17:57:28 +0800 Message-Id: <20210719095729.834332-7-ming.lei@redhat.com> In-Reply-To: <20210719095729.834332-1-ming.lei@redhat.com> References: <20210719095729.834332-1-ming.lei@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 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 --- include/linux/group_cpus.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/include/linux/group_cpus.h b/include/linux/group_cpus.h index e42807ec61f6..79e5cc15bd96 100644 --- a/include/linux/group_cpus.h +++ b/include/linux/group_cpus.h @@ -9,6 +9,20 @@ #include #include +#ifdef CONFIG_SMP struct cpumask *group_cpus_evenly(unsigned int numgrps); +#else +static inline 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 #endif -- 2.31.1