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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,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 37A68C7618F for ; Mon, 15 Jul 2019 20:25:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 149E920665 for ; Mon, 15 Jul 2019 20:25:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732326AbfGOUZD (ORCPT ); Mon, 15 Jul 2019 16:25:03 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33206 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731055AbfGOUZD (ORCPT ); Mon, 15 Jul 2019 16:25:03 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 62F673081244; Mon, 15 Jul 2019 20:25:02 +0000 (UTC) Received: from torg.redhat.com (ovpn-121-239.rdu2.redhat.com [10.10.121.239]) by smtp.corp.redhat.com (Postfix) with ESMTP id 958225D721; Mon, 15 Jul 2019 20:25:01 +0000 (UTC) From: Clark Williams To: Thomas Gleixner Cc: LKML , RT List Subject: [PATCH] x86_pkg_temp_thermal: make pkg_temp_lock a raw spinlock Date: Mon, 15 Jul 2019 15:25:00 -0500 Message-Id: <20190715202500.6742-1-williams@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.49]); Mon, 15 Jul 2019 20:25:02 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The spinlock pkg_temp_lock has the potential of being taken in atomic context on v5.2-rt PREEMPT_RT. It's static and limited scope so go ahead and make it a raw spinlock. Signed-off-by: Clark Williams --- drivers/thermal/intel/x86_pkg_temp_thermal.c | 24 ++++++++++---------- 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/drivers/thermal/intel/x86_pkg_temp_thermal.c b/drivers/thermal/intel/x86_pkg_temp_thermal.c index 319b77126168..92ceed3de6f3 100644 --- a/drivers/thermal/intel/x86_pkg_temp_thermal.c +++ b/drivers/thermal/intel/x86_pkg_temp_thermal.c @@ -63,7 +63,7 @@ static int max_packages __read_mostly; /* Array of package pointers */ static struct pkg_device **packages; /* Serializes interrupt notification, work and hotplug */ -static DEFINE_SPINLOCK(pkg_temp_lock); +static DEFINE_RAW_SPINLOCK(pkg_temp_lock); /* Protects zone operation in the work function against hotplug removal */ static DEFINE_MUTEX(thermal_zone_mutex); @@ -279,12 +279,12 @@ static void pkg_temp_thermal_threshold_work_fn(struct work_struct *work) u64 msr_val, wr_val; mutex_lock(&thermal_zone_mutex); - spin_lock_irq(&pkg_temp_lock); + raw_spin_lock_irq(&pkg_temp_lock); ++pkg_work_cnt; pkgdev = pkg_temp_thermal_get_dev(cpu); if (!pkgdev) { - spin_unlock_irq(&pkg_temp_lock); + raw_spin_unlock_irq(&pkg_temp_lock); mutex_unlock(&thermal_zone_mutex); return; } @@ -298,7 +298,7 @@ static void pkg_temp_thermal_threshold_work_fn(struct work_struct *work) } enable_pkg_thres_interrupt(); - spin_unlock_irq(&pkg_temp_lock); + raw_spin_unlock_irq(&pkg_temp_lock); /* * If tzone is not NULL, then thermal_zone_mutex will prevent the @@ -323,7 +323,7 @@ static int pkg_thermal_notify(u64 msr_val) struct pkg_device *pkgdev; unsigned long flags; - spin_lock_irqsave(&pkg_temp_lock, flags); + raw_spin_lock_irqsave(&pkg_temp_lock, flags); ++pkg_interrupt_cnt; disable_pkg_thres_interrupt(); @@ -335,7 +335,7 @@ static int pkg_thermal_notify(u64 msr_val) pkg_thermal_schedule_work(pkgdev->cpu, &pkgdev->work); } - spin_unlock_irqrestore(&pkg_temp_lock, flags); + raw_spin_unlock_irqrestore(&pkg_temp_lock, flags); return 0; } @@ -381,9 +381,9 @@ static int pkg_temp_thermal_device_add(unsigned int cpu) pkgdev->msr_pkg_therm_high); cpumask_set_cpu(cpu, &pkgdev->cpumask); - spin_lock_irq(&pkg_temp_lock); + raw_spin_lock_irq(&pkg_temp_lock); packages[pkgid] = pkgdev; - spin_unlock_irq(&pkg_temp_lock); + raw_spin_unlock_irq(&pkg_temp_lock); return 0; } @@ -420,7 +420,7 @@ static int pkg_thermal_cpu_offline(unsigned int cpu) } /* Protect against work and interrupts */ - spin_lock_irq(&pkg_temp_lock); + raw_spin_lock_irq(&pkg_temp_lock); /* * Check whether this cpu was the current target and store the new @@ -452,9 +452,9 @@ static int pkg_thermal_cpu_offline(unsigned int cpu) * To cancel the work we need to drop the lock, otherwise * we might deadlock if the work needs to be flushed. */ - spin_unlock_irq(&pkg_temp_lock); + raw_spin_unlock_irq(&pkg_temp_lock); cancel_delayed_work_sync(&pkgdev->work); - spin_lock_irq(&pkg_temp_lock); + raw_spin_lock_irq(&pkg_temp_lock); /* * If this is not the last cpu in the package and the work * did not run after we dropped the lock above, then we @@ -465,7 +465,7 @@ static int pkg_thermal_cpu_offline(unsigned int cpu) pkg_thermal_schedule_work(target, &pkgdev->work); } - spin_unlock_irq(&pkg_temp_lock); + raw_spin_unlock_irq(&pkg_temp_lock); /* Final cleanup if this is the last cpu */ if (lastcpu) -- 2.21.0