From patchwork Fri Jul 12 17:00:21 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joel Fernandes X-Patchwork-Id: 11042569 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D71B4138D for ; Fri, 12 Jul 2019 17:01:31 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C18B328A17 for ; Fri, 12 Jul 2019 17:01:31 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B46E528BE9; Fri, 12 Jul 2019 17:01:31 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6A87C289A5 for ; Fri, 12 Jul 2019 17:01:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727024AbfGLRBa (ORCPT ); Fri, 12 Jul 2019 13:01:30 -0400 Received: from mail-pl1-f193.google.com ([209.85.214.193]:40468 "EHLO mail-pl1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727544AbfGLRA7 (ORCPT ); Fri, 12 Jul 2019 13:00:59 -0400 Received: by mail-pl1-f193.google.com with SMTP id a93so5049550pla.7 for ; Fri, 12 Jul 2019 10:00:59 -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=AptpBaMmXVEAzBSMLWJKxPr4rttPnZ1wioK1nwnHwy8=; b=yQvAOcpIfNDNwzp6qEHjOsGXYqVnpbH/+yqEi1B80+c8YsLEO2bHlrNL9T4ka/DGw/ z2jqgOlDW+zlIDSpKaAxSzYrAquMnRnl5eFGmevh+cE6wTqwUm8hjiPn1KaWffrhd+9j /1RA5jQTnJIh+/+WoSk+cY6XTKUqwecgKppuY= 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=AptpBaMmXVEAzBSMLWJKxPr4rttPnZ1wioK1nwnHwy8=; b=GvpZzRqcE2nloviDDkB0MHria63K0wyJuNjzYSnuRjJCA2RNTQoDCqcwRZdQeXSk2w c4emh6ZGPGNQt9c3FMp/GzQghVDC+U+Za/GWWW4zAW+FRGAzhfDfigxyFn4cLpPXzYX/ mOGo7UUX9psrQGhNDLf2WgyNKNm8QHIVab1lP26xjy25c5BPSh/m42+9xV3CEbWRyFvE cvUuJyaSqQpuld7+w8IinSRKoYa2KdbJKoawVlAFH5cPVTKCJApqk9+ZmcNv2NzriR/J 4i/+hpxh3qGzK3k1DlsDkPpj25yy+Lmgtk2Ag3e6FSHPE2SOv+HH35na1nSAh3BS46UK 4MPA== X-Gm-Message-State: APjAAAXDtpY3aI83ZQvF3+9XT8CUIP19MTfWdaP0BMGA0H/cP+R8Z9uO uiY+KND9WlosWLhLS/LJFrY= X-Google-Smtp-Source: APXvYqxSVQC9IuM5FvE8lT+y5f9yl5+BBjiQfPurEohLODoTR1n3Ry5MZxUFhO2jwyxSjsXaeUm7lw== X-Received: by 2002:a17:902:7c96:: with SMTP id y22mr12852939pll.39.1562950858903; Fri, 12 Jul 2019 10:00:58 -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.3.2019.07.12.10.00.54 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Fri, 12 Jul 2019 10:00:58 -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 6/9] workqueue: Convert for_each_wq to use built-in list check Date: Fri, 12 Jul 2019 13:00:21 -0400 Message-Id: <20190712170024.111093-7-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 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP list_for_each_entry_rcu now has support to check for RCU reader sections as well as lock. Just use the support in it, instead of explictly checking in the caller. Signed-off-by: Joel Fernandes (Google) --- kernel/workqueue.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 9657315405de..5e88449bdd83 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -363,11 +363,6 @@ static void workqueue_sysfs_unregister(struct workqueue_struct *wq); !lockdep_is_held(&wq_pool_mutex), \ "RCU or wq_pool_mutex should be held") -#define assert_rcu_or_wq_mutex(wq) \ - RCU_LOCKDEP_WARN(!rcu_read_lock_held() && \ - !lockdep_is_held(&wq->mutex), \ - "RCU or wq->mutex should be held") - #define assert_rcu_or_wq_mutex_or_pool_mutex(wq) \ RCU_LOCKDEP_WARN(!rcu_read_lock_held() && \ !lockdep_is_held(&wq->mutex) && \ @@ -424,9 +419,8 @@ static void workqueue_sysfs_unregister(struct workqueue_struct *wq); * ignored. */ #define for_each_pwq(pwq, wq) \ - list_for_each_entry_rcu((pwq), &(wq)->pwqs, pwqs_node) \ - if (({ assert_rcu_or_wq_mutex(wq); false; })) { } \ - else + list_for_each_entry_rcu((pwq), &(wq)->pwqs, pwqs_node, \ + lock_is_held(&(wq->mutex).dep_map)) #ifdef CONFIG_DEBUG_OBJECTS_WORK