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=-11.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 49A9EC433DF for ; Wed, 27 May 2020 08:12:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2486221508 for ; Wed, 27 May 2020 08:12:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387774AbgE0IMX (ORCPT ); Wed, 27 May 2020 04:12:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42324 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387755AbgE0IMU (ORCPT ); Wed, 27 May 2020 04:12:20 -0400 Received: from Galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 66767C03E97A; Wed, 27 May 2020 01:12:20 -0700 (PDT) Received: from [5.158.153.53] (helo=tip-bot2.lab.linutronix.de) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1jdrAQ-0002eW-OO; Wed, 27 May 2020 10:12:02 +0200 Received: from [127.0.1.1] (localhost [IPv6:::1]) by tip-bot2.lab.linutronix.de (Postfix) with ESMTP id 6790B1C070D; Wed, 27 May 2020 10:11:58 +0200 (CEST) Date: Wed, 27 May 2020 08:11:58 -0000 From: "tip-bot2 for Thomas Gleixner" Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: x86/entry] genirq: Provide __irq_enter/exit_raw() Cc: Thomas Gleixner , Ingo Molnar , Andy Lutomirski , x86 , LKML In-Reply-To: <20200521202117.671682341@linutronix.de> References: <20200521202117.671682341@linutronix.de> MIME-Version: 1.0 Message-ID: <159056711827.17951.14893427079916825731.tip-bot2@tip-bot2> X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the x86/entry branch of tip: Commit-ID: 355e1262d6038b37f0dbf5f3cfe64cc85d471b7b Gitweb: https://git.kernel.org/tip/355e1262d6038b37f0dbf5f3cfe64cc85d471b7b Author: Thomas Gleixner AuthorDate: Thu, 21 May 2020 22:05:22 +02:00 Committer: Ingo Molnar CommitterDate: Tue, 26 May 2020 19:06:27 +02:00 genirq: Provide __irq_enter/exit_raw() Like __irq_enter/exit() but without time accounting. To be used for "empty" system vectors like the scheduler IPI to avoid the overhead. Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar Reviewed-by: Andy Lutomirski Link: https://lore.kernel.org/r/20200521202117.671682341@linutronix.de --- include/linux/hardirq.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/include/linux/hardirq.h b/include/linux/hardirq.h index 3dc9102..03c9fec 100644 --- a/include/linux/hardirq.h +++ b/include/linux/hardirq.h @@ -38,6 +38,17 @@ static __always_inline void rcu_irq_enter_check_tick(void) } while (0) /* + * Like __irq_enter() without time accounting for fast + * interrupts, e.g. reschedule IPI where time accounting + * is more expensive than the actual interrupt. + */ +#define __irq_enter_raw() \ + do { \ + preempt_count_add(HARDIRQ_OFFSET); \ + lockdep_hardirq_enter(); \ + } while (0) + +/* * Enter irq context (on NO_HZ, update jiffies): */ void irq_enter(void); @@ -57,6 +68,15 @@ void irq_enter_rcu(void); } while (0) /* + * Like __irq_exit() without time accounting + */ +#define __irq_exit_raw() \ + do { \ + lockdep_hardirq_exit(); \ + preempt_count_sub(HARDIRQ_OFFSET); \ + } while (0) + +/* * Exit irq context and process softirqs if needed: */ void irq_exit(void);