From patchwork Mon Jul 15 14:37:02 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joel Fernandes X-Patchwork-Id: 1132055 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="sb4sRCBH"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 45nRB62HGsz9sP7 for ; Tue, 16 Jul 2019 00:44:14 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404107AbfGOOoN (ORCPT ); Mon, 15 Jul 2019 10:44:13 -0400 Received: from mail-pg1-f193.google.com ([209.85.215.193]:39619 "EHLO mail-pg1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391842AbfGOOhj (ORCPT ); Mon, 15 Jul 2019 10:37:39 -0400 Received: by mail-pg1-f193.google.com with SMTP id u17so7811698pgi.6 for ; Mon, 15 Jul 2019 07:37:38 -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=UMymzQWyTMjq6dLEXUYHnnYNVQu32eRzbAFgwnIdCTM=; b=sb4sRCBHFXSE2cPqMR4+T5ZCDTZOXkYZvOefdmVbThG07/8ujO+ZMUI1qi0RzfQNtk L2SG3O8Wv6tkY7NUfEU97Sodrr0ncVViDxOuD+Tu+lrXlmz95G5bFlD4Z39OvL7tmZa8 r01KC9K2ZD2d1/zC/71KGiI4hO6ZU/NWudwNw= 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=UMymzQWyTMjq6dLEXUYHnnYNVQu32eRzbAFgwnIdCTM=; b=r2pta1Wf2/IY5WL4SoPNwQOA00XDaWcal0PCNcOcVvaD9tQ57XdbdrEIJMQdjnD8us NvdZmOrVqubqo9lu8DqXP7qKF77VOI7b9Oyq+CmgIDwXzA2iSasEHUf1rkgJWlSxAKtY +qhw/duKobZgr+mhpWPZGsPT933IslwucaqVGPHU9hoQsj+TrA3x/MzBRY+kKZG4Tm9f xiddYrkrYPQqyK7rQ/AfTQ3maoszIajAbylZgMU1ot7Fb27YvMpScQ7KoCy8NBCXhojq d69NI07paZFYsmZYd13HE6/1vwtdZY0rZwiZfUpjnMgfGgpXMPqWf1r4B3bs5vuzB7eQ yy/g== X-Gm-Message-State: APjAAAX6L/de9gopA+wqZ+uiU5qIo1dHdrBzeftvOCmjjsO3N6jgi0np qw0wrm5csJjHIfyNxgSdjoQ= X-Google-Smtp-Source: APXvYqwREOPm8jU5KaBh/4wpCriK+UOZQMzbDI3ea0SFjpipVn94p6ZbCr/TlFhUWr/4kL8J5e58FQ== X-Received: by 2002:a17:90a:3270:: with SMTP id k103mr28578111pjb.54.1563201458425; Mon, 15 Jul 2019 07:37:38 -0700 (PDT) Received: from joelaf.cam.corp.google.com ([2620:15c:6:12:9c46:e0da:efbf:69cc]) by smtp.gmail.com with ESMTPSA id s66sm18381852pfs.8.2019.07.15.07.37.34 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Mon, 15 Jul 2019 07:37:37 -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 6/9] workqueue: Convert for_each_wq to use built-in list check (v2) Date: Mon, 15 Jul 2019 10:37:02 -0400 Message-Id: <20190715143705.117908-7-joel@joelfernandes.org> X-Mailer: git-send-email 2.22.0.510.g264f2c817a-goog In-Reply-To: <20190715143705.117908-1-joel@joelfernandes.org> References: <20190715143705.117908-1-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 | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 601d61150b65..e882477ebf6e 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -364,11 +364,6 @@ 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) && \ @@ -425,9 +420,8 @@ 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