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=-9.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 8116DC742D4 for ; Fri, 12 Jul 2019 17:00:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4DA71208E4 for ; Fri, 12 Jul 2019 17:00:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=joelfernandes.org header.i=@joelfernandes.org header.b="r+S4YTbr" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727389AbfGLRAj (ORCPT ); Fri, 12 Jul 2019 13:00:39 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:45245 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727364AbfGLRAi (ORCPT ); Fri, 12 Jul 2019 13:00:38 -0400 Received: by mail-pf1-f194.google.com with SMTP id r1so4540980pfq.12 for ; Fri, 12 Jul 2019 10:00:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=joelfernandes.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=HcJl4MkrcKZUWVrbOFfh0nnEc2FkI1NyULrXND4C1ok=; b=r+S4YTbrFLXAaoxGT4GzejGKAZshIM9bV3jcdcbEAdv0c619zHSqLN4ei3n7OXVNx6 n8Mkpq4NMeAreqKp6CxwsDaUWLUdSJGaBd+a1NpA03X4d2w8pRoRmAK3YM7By8+HEacE 0fDSDMaBiifV8te0r9UChxgacvAyvBEzMCd4c= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=HcJl4MkrcKZUWVrbOFfh0nnEc2FkI1NyULrXND4C1ok=; b=cMmyUaFyw32gms7uOvLU63ksNyL5Bu/TtwnS0KsR8kmu3mPVItH3i4A+VVRhUfHnAn LqKGiTp4fU8G+2uwR+nTVv14wRMcl8vCTJqZE8oEHPgIgZ7ZwCYsMr3vOu798g10yGBC Dv57YvEAHe0QHbFhwlZmCg5UPjGsBhP1rNMLBXbBODa5WTfip56/YAdGGti23HMlpdzJ a1P96L0SMpy19RaoO2ZEu5joz0cHolTpsIiml7ZTXBK0yHJNbCFaMDeiZ/E0RwNyy2fu a9NGX3EGmS612hy2FAg6sEZfNlICI+3vgZEgR75sHM3LdkQBjHm0xBy9MHpPqzok4LFp nmYA== X-Gm-Message-State: APjAAAVlP3umyxfeFLDNC4cfL5MdAyt9GVZama+h+2qAL/ba8yS8BTRq lS3DsF4dlHQEN88w5kYlZcI= X-Google-Smtp-Source: APXvYqz15AQfC5v0dP6hN1pCpPQdyBrMqETAncc2VKUY67QfxtlC3x1zPGrp7KZtSsMpaH2x5QNcdQ== X-Received: by 2002:a17:90b:8c8:: with SMTP id ds8mr13144837pjb.89.1562950837630; Fri, 12 Jul 2019 10:00:37 -0700 (PDT) Received: from joelaf.cam.corp.google.com ([2620:15c:6:12:9c46:e0da:efbf:69cc]) by smtp.gmail.com with ESMTPSA id a15sm7127385pgw.3.2019.07.12.10.00.33 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Fri, 12 Jul 2019 10:00:36 -0700 (PDT) From: "Joel Fernandes (Google)" To: linux-kernel@vger.kernel.org Cc: "Joel Fernandes (Google)" , Alexey Kuznetsov , Bjorn Helgaas , Borislav Petkov , c0d1n61at3@gmail.com, "David S. Miller" , edumazet@google.com, Greg Kroah-Hartman , Hideaki YOSHIFUJI , "H. Peter Anvin" , Ingo Molnar , Jonathan Corbet , Josh Triplett , keescook@chromium.org, kernel-hardening@lists.openwall.com, kernel-team@android.com, Lai Jiangshan , Len Brown , linux-acpi@vger.kernel.org, linux-doc@vger.kernel.org, linux-pci@vger.kernel.org, linux-pm@vger.kernel.org, Mathieu Desnoyers , neilb@suse.com, netdev@vger.kernel.org, Oleg Nesterov , "Paul E. McKenney" , Pavel Machek , peterz@infradead.org, "Rafael J. Wysocki" , Rasmus Villemoes , rcu@vger.kernel.org, Steven Rostedt , Tejun Heo , Thomas Gleixner , will@kernel.org, x86@kernel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)) Subject: [PATCH v2 1/9] rcu/update: Remove useless check for debug_locks Date: Fri, 12 Jul 2019 13:00:16 -0400 Message-Id: <20190712170024.111093-2-joel@joelfernandes.org> X-Mailer: git-send-email 2.22.0.510.g264f2c817a-goog In-Reply-To: <20190712170024.111093-1-joel@joelfernandes.org> References: <20190712170024.111093-1-joel@joelfernandes.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: rcu-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org In rcu_read_lock_sched_held(), debug_locks can never be true at the point we check it because we already check debug_locks in debug_lockdep_rcu_enabled() in the beginning. Remove the check. Signed-off-by: Joel Fernandes (Google) --- kernel/rcu/update.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c index c3bf44ba42e5..bb961cd89e76 100644 --- a/kernel/rcu/update.c +++ b/kernel/rcu/update.c @@ -93,17 +93,13 @@ module_param(rcu_normal_after_boot, int, 0); */ int rcu_read_lock_sched_held(void) { - int lockdep_opinion = 0; - if (!debug_lockdep_rcu_enabled()) return 1; if (!rcu_is_watching()) return 0; if (!rcu_lockdep_current_cpu_online()) return 0; - if (debug_locks) - lockdep_opinion = lock_is_held(&rcu_sched_lock_map); - return lockdep_opinion || !preemptible(); + return lock_is_held(&rcu_sched_lock_map) || !preemptible(); } EXPORT_SYMBOL(rcu_read_lock_sched_held); #endif -- 2.22.0.510.g264f2c817a-goog