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=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=no 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 53EF3C10DCE for ; Thu, 12 Mar 2020 05:55:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 40A0B20663 for ; Thu, 12 Mar 2020 05:55:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387874AbgCLFzs (ORCPT ); Thu, 12 Mar 2020 01:55:48 -0400 Received: from shards.monkeyblade.net ([23.128.96.9]:55968 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387677AbgCLFzr (ORCPT ); Thu, 12 Mar 2020 01:55:47 -0400 Received: from localhost (unknown [IPv6:2601:601:9f00:477::3d5]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id 2C17C14C7E036; Wed, 11 Mar 2020 22:55:46 -0700 (PDT) Date: Wed, 11 Mar 2020 22:55:45 -0700 (PDT) Message-Id: <20200311.225545.780993448550563267.davem@davemloft.net> To: frextrite@gmail.com Cc: kuba@kernel.org, gregkh@linuxfoundation.org, tglx@linutronix.de, rfontana@redhat.com, allison@lohutok.net, pabeni@redhat.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kernel-mentees@lists.linuxfoundation.org, joel@joelfernandes.org, madhuparnabhowmik10@gmail.com, paulmck@kernel.org, lkp@intel.com Subject: Re: [PATCH] net: caif: Add lockdep expression to RCU traversal primitive From: David Miller In-Reply-To: <20200312053419.12258-1-frextrite@gmail.com> References: <20200312053419.12258-1-frextrite@gmail.com> X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Wed, 11 Mar 2020 22:55:46 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Amol Grover Date: Thu, 12 Mar 2020 11:04:20 +0530 > caifdevs->list is traversed using list_for_each_entry_rcu() > outside an RCU read-side critical section but under the > protection of rtnl_mutex. Hence, add the corresponding lockdep > expression to silence the following false-positive warning: > > [ 10.868467] ============================= > [ 10.869082] WARNING: suspicious RCU usage > [ 10.869817] 5.6.0-rc1-00177-g06ec0a154aae4 #1 Not tainted > [ 10.870804] ----------------------------- > [ 10.871557] net/caif/caif_dev.c:115 RCU-list traversed in non-reader section!! > > Reported-by: kernel test robot > Signed-off-by: Amol Grover Applied, thank you.