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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 0455AC4321E for ; Wed, 5 Sep 2018 12:30:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A2E1B20857 for ; Wed, 5 Sep 2018 12:30:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A2E1B20857 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=goodmis.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727968AbeIERAe (ORCPT ); Wed, 5 Sep 2018 13:00:34 -0400 Received: from mail.kernel.org ([198.145.29.99]:47214 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727676AbeIEQ6j (ORCPT ); Wed, 5 Sep 2018 12:58:39 -0400 Received: from gandalf.local.home (cpe-66-24-56-78.stny.res.rr.com [66.24.56.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 05A8520870; Wed, 5 Sep 2018 12:28:37 +0000 (UTC) Received: from rostedt by gandalf.local.home with local (Exim 4.91) (envelope-from ) id 1fxWvE-0002Ao-1s; Wed, 05 Sep 2018 08:28:36 -0400 Message-Id: <20180905122835.952828400@goodmis.org> User-Agent: quilt/0.65 Date: Wed, 05 Sep 2018 08:28:04 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org, linux-rt-users Cc: Thomas Gleixner , Carsten Emde , Sebastian Andrzej Siewior , John Kacur , Paul Gortmaker , Julia Cartwright , Daniel Wagner , tom.zanussi@linux.intel.com Subject: [PATCH RT 10/22] irqchip/gic-v3-its: Make its_lock a raw_spin_lock_t References: <20180905122754.443196118@goodmis.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.14.63-rt41-rc1 stable review patch. If anyone has any objections, please let me know. ------------------ From: Sebastian Andrzej Siewior [ Upstream commit c7a3334c762a9b1dd2e39cb2ded00ce66e8a06d1 ] The its_lock lock is held while a new device is added to the list and during setup while the CPU is booted. Even on -RT the CPU-bootup is performed with disabled interrupts. Make its_lock a raw_spin_lock_t. Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Steven Rostedt (VMware) --- drivers/irqchip/irq-gic-v3-its.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 2ea39a83737f..e8217ebe8c1e 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -148,7 +148,7 @@ static struct { } vpe_proxy; static LIST_HEAD(its_nodes); -static DEFINE_SPINLOCK(its_lock); +static DEFINE_RAW_SPINLOCK(its_lock); static struct rdists *gic_rdists; static struct irq_domain *its_parent; @@ -1850,7 +1850,7 @@ static void its_cpu_init_collection(void) struct its_node *its; int cpu; - spin_lock(&its_lock); + raw_spin_lock(&its_lock); cpu = smp_processor_id(); list_for_each_entry(its, &its_nodes, entry) { @@ -1892,7 +1892,7 @@ static void its_cpu_init_collection(void) its_send_invall(its, &its->collections[cpu]); } - spin_unlock(&its_lock); + raw_spin_unlock(&its_lock); } static struct its_device *its_find_device(struct its_node *its, u32 dev_id) @@ -3041,9 +3041,9 @@ static int __init its_probe_one(struct resource *res, if (err) goto out_free_tables; - spin_lock(&its_lock); + raw_spin_lock(&its_lock); list_add(&its->entry, &its_nodes); - spin_unlock(&its_lock); + raw_spin_unlock(&its_lock); return 0; -- 2.18.0