From patchwork Sat Aug 31 05:58:21 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yunsheng Lin X-Patchwork-Id: 11124773 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2E2BE1800 for ; Sat, 31 Aug 2019 06:01:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 17F9E23784 for ; Sat, 31 Aug 2019 06:01:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727615AbfHaGA7 (ORCPT ); Sat, 31 Aug 2019 02:00:59 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:6152 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726963AbfHaGA6 (ORCPT ); Sat, 31 Aug 2019 02:00:58 -0400 Received: from DGGEMS404-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id BFEA57A68E9CC99D4C43; Sat, 31 Aug 2019 14:00:46 +0800 (CST) Received: from localhost.localdomain (10.67.212.75) by DGGEMS404-HUB.china.huawei.com (10.3.19.204) with Microsoft SMTP Server id 14.3.439.0; Sat, 31 Aug 2019 14:00:36 +0800 From: Yunsheng Lin To: , , , , , , , , , , , , , , , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v2 7/9] sparc64: numa: check the node id consistently for sparc64 Date: Sat, 31 Aug 2019 13:58:21 +0800 Message-ID: <1567231103-13237-8-git-send-email-linyunsheng@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1567231103-13237-1-git-send-email-linyunsheng@huawei.com> References: <1567231103-13237-1-git-send-email-linyunsheng@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.67.212.75] X-CFilter-Loop: Reflected Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org According to Section 6.2.14 from ACPI spec 6.3 [1], the setting of proximity domain is optional, as below: This optional object is used to describe proximity domain associations within a machine. _PXM evaluates to an integer that identifies a device as belonging to a Proximity Domain defined in the System Resource Affinity Table (SRAT). This patch checks node id with the below case before returning &numa_cpumask_lookup_table[node]: 1. if node_id >= nr_node_ids, return cpu_none_mask 2. if node_id < 0, return cpu_online_mask 3. Since numa_cpumask_lookup_table is not a pointer, a comment is added to indicate that [1] https://uefi.org/sites/default/files/resources/ACPI_6_3_final_Jan30.pdf Signed-off-by: Yunsheng Lin --- arch/sparc/include/asm/topology_64.h | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/arch/sparc/include/asm/topology_64.h b/arch/sparc/include/asm/topology_64.h index 34c628a..66a7917 100644 --- a/arch/sparc/include/asm/topology_64.h +++ b/arch/sparc/include/asm/topology_64.h @@ -11,9 +11,19 @@ static inline int cpu_to_node(int cpu) return numa_cpu_lookup_table[cpu]; } -#define cpumask_of_node(node) ((node) == -1 ? \ - cpu_all_mask : \ - &numa_cpumask_lookup_table[node]) +static inline const struct cpumask *cpumask_of_node(int node) +{ + if (node >= MAX_NUMNODES) + return cpu_none_mask; + + /* numa_cpumask_lookup_table[node] is not a pointer, so + * no need to check for NULL here. + */ + if (node < 0) + return cpu_online_mask; + + return &numa_cpumask_lookup_table[node]; +} struct pci_bus; #ifdef CONFIG_PCI