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=-9.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 DA97FC46462 for ; Wed, 10 Oct 2018 23:13:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7F34121526 for ; Wed, 10 Oct 2018 23:13:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="1jRinH74" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7F34121526 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.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 S1727398AbeJKGhg (ORCPT ); Thu, 11 Oct 2018 02:37:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:35786 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727291AbeJKGhf (ORCPT ); Thu, 11 Oct 2018 02:37:35 -0400 Received: from lerouge.suse.de (LFbn-NCY-1-241-207.w83-194.abo.wanadoo.fr [83.194.85.207]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2C032214C4; Wed, 10 Oct 2018 23:13:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1539213194; bh=kBO09AKHgomL2iAA5/sLRku4inhxuDBaT0QUgGn/RPU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1jRinH74upEtjx2+c8pDYg/5KyMvmdnC8qtEJqU4Sj2BkR3mLV4MeIKIwcLMls00D 1Po8C/dJLyUiFjoP7wrmWMx0ShNcxfJyZ4HB4c5WSXEq+SI+r2FhF3Y5wa5O4STu/b wkxxYsdzy5ZTwdeH4wcnyqTqGsnV7MZlWwIuqb9A= From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Sebastian Andrzej Siewior , Peter Zijlstra , "David S . Miller" , Linus Torvalds , Thomas Gleixner , "Paul E . McKenney" , Ingo Molnar , Frederic Weisbecker , Mauro Carvalho Chehab Subject: [RFC PATCH 14/30] softirq: Introduce local_bh_disable_all() Date: Thu, 11 Oct 2018 01:12:01 +0200 Message-Id: <1539213137-13953-15-git-send-email-frederic@kernel.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1539213137-13953-1-git-send-email-frederic@kernel.org> References: <1539213137-13953-1-git-send-email-frederic@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org As we plan to narrow down local_bh_disable() to a per-vector disablement granularity, a shortcut can be handy for code that want to disable all of them and not care about carrying the bh enabled mask state prior to the call. (TODO: check that it is called while bh are ALL enabled because local_bh_enable_all() is going to re-enable ALL of them. Pretty much like there should be no local_irq_enable() between a pair or local_irq_save() and local_irq_restore()). Signed-off-by: Frederic Weisbecker Cc: Ingo Molnar Cc: Sebastian Andrzej Siewior Cc: Thomas Gleixner Cc: Peter Zijlstra Cc: Linus Torvalds Cc: David S. Miller Cc: Mauro Carvalho Chehab Cc: Paul E. McKenney --- include/linux/bottom_half.h | 3 +++ kernel/softirq.c | 10 ++++++++++ 2 files changed, 13 insertions(+) diff --git a/include/linux/bottom_half.h b/include/linux/bottom_half.h index fd75d1a..192a71c 100644 --- a/include/linux/bottom_half.h +++ b/include/linux/bottom_half.h @@ -64,4 +64,7 @@ static inline void local_bh_enable(void) __local_bh_enable_ip(_THIS_IP_, SOFTIRQ_DISABLE_OFFSET); } +extern void local_bh_disable_all(void); +extern void local_bh_enable_all(void); + #endif /* _LINUX_BH_H */ diff --git a/kernel/softirq.c b/kernel/softirq.c index 75aab25..730a5c9 100644 --- a/kernel/softirq.c +++ b/kernel/softirq.c @@ -197,6 +197,16 @@ void __local_bh_enable_ip(unsigned long ip, unsigned int cnt) } EXPORT_SYMBOL(__local_bh_enable_ip); +void local_bh_disable_all(void) +{ + local_bh_disable(); +} + +void local_bh_enable_all(void) +{ + local_bh_enable(); +} + /* * We restart softirq processing for at most MAX_SOFTIRQ_RESTART times, * but break the loop if need_resched() is set or after 2 ms. -- 2.7.4