From patchwork Thu Jul 11 23:43:59 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joel Fernandes X-Patchwork-Id: 1131075 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=joelfernandes.org Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=joelfernandes.org header.i=@joelfernandes.org header.b="tCGTNt4C"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 45lCMs47j7z9sDB for ; Fri, 12 Jul 2019 09:44:57 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730507AbfGKXoe (ORCPT ); Thu, 11 Jul 2019 19:44:34 -0400 Received: from mail-pl1-f195.google.com ([209.85.214.195]:42902 "EHLO mail-pl1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730496AbfGKXoa (ORCPT ); Thu, 11 Jul 2019 19:44:30 -0400 Received: by mail-pl1-f195.google.com with SMTP id ay6so3823024plb.9 for ; Thu, 11 Jul 2019 16:44:30 -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=sb5/sBlO0o0IY+ND5ZXjrKZw9gM/z/BZ2b8OMvqM37o=; b=tCGTNt4ClbRqV/NfTPLBheEFeH7Zn70VzEPVb6u6yQtg9GPOuDTUPJlXw6bBhUJ1CR QpGk/qoWbRMoK0Pts8WznAkBiv/X+3OAFvGO2tXIqriAKW54HJaBcZeAgZjm6E+3gJ7u xfrwf9Vd3o1AR/P1EbjFliZLl/0moKn0MvFEE= 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=sb5/sBlO0o0IY+ND5ZXjrKZw9gM/z/BZ2b8OMvqM37o=; b=LkoLdG5JDc3cwQ+nxXM7oCSvCBVXdl9Z8AsbSwl2kkGHetmQs6vsIXWcjKVU8AI539 vUurlau/UmSHZP5C5nd1dTb+0x2dxbM94h3ABQ6G6L1C1VIkkeIMeSjncgnNnRLejKjz oi0iBGpXzN+u+fOxK5FdZcE52Mvim8qnUpGlOT/yTnC5eqnOiRBdnE8rrJdJ3f8TxgU4 4GTP0Wa9dO/QLlaMd4Hd20lzyx+ozGQztzy8XZX/03LUhnwst9FrQ+1yW7IpN3IF4LVy V+wcRHRZjH84H6NCN9GDaDhmgrEF9A/U0JSsujPqHEHdDLgPcmhK9rgj/Beg8HblDz/3 +smg== X-Gm-Message-State: APjAAAV0g7kZiHuq+ErjwfUcUSNKSBk0ffIxNFpRcRfT+de7MVv5VGxZ mGO1hQIUWCN7RLLcwDJwUdc= X-Google-Smtp-Source: APXvYqz7RwC1sXenfqK+KGjrZckG5hTYMGbFgu1GP0DrdQq+/nz6LQrmjYSvr647um8kWQAd2c41tw== X-Received: by 2002:a17:902:381:: with SMTP id d1mr7408739pld.331.1562888670006; Thu, 11 Jul 2019 16:44:30 -0700 (PDT) Received: from joelaf.cam.corp.google.com ([2620:15c:6:12:9c46:e0da:efbf:69cc]) by smtp.gmail.com with ESMTPSA id t10sm6163450pjr.13.2019.07.11.16.44.26 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Thu, 11 Jul 2019 16:44:29 -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 , Josh Triplett , keescook@chromium.org, kernel-hardening@lists.openwall.com, Lai Jiangshan , Len Brown , linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org, linux-pm@vger.kernel.org, Mathieu Desnoyers , neilb@suse.com, netdev@vger.kernel.org, oleg@redhat.com, "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 v1 4/6] workqueue: Convert for_each_wq to use built-in list check Date: Thu, 11 Jul 2019 19:43:59 -0400 Message-Id: <20190711234401.220336-5-joel@joelfernandes.org> X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog In-Reply-To: <20190711234401.220336-1-joel@joelfernandes.org> References: <20190711234401.220336-1-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 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 | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 9657315405de..91ed7aca16e5 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -424,9 +424,8 @@ 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