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=-8.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=unavailable 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 7B48BC3F2D1 for ; Tue, 3 Mar 2020 16:54:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5824120863 for ; Tue, 3 Mar 2020 16:54:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730447AbgCCQyv (ORCPT ); Tue, 3 Mar 2020 11:54:51 -0500 Received: from fieldses.org ([173.255.197.46]:37344 "EHLO fieldses.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727070AbgCCQyu (ORCPT ); Tue, 3 Mar 2020 11:54:50 -0500 Received: by fieldses.org (Postfix, from userid 2815) id 628351C22; Tue, 3 Mar 2020 11:54:50 -0500 (EST) Date: Tue, 3 Mar 2020 11:54:50 -0500 From: "J. Bruce Fields" To: madhuparnabhowmik10@gmail.com Cc: chuck.lever@oracle.com, linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org, joel@joelfernandes.org, frextrite@gmail.com, linux-kernel-mentees@lists.linuxfoundation.org, paulmck@kernel.org Subject: Re: [PATCH] fs: nfsd: fileache.c: Use built-in RCU list checking Message-ID: <20200303165450.GD19140@fieldses.org> References: <20200213150359.5819-1-madhuparnabhowmik10@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200213150359.5819-1-madhuparnabhowmik10@gmail.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Applying for 5.7, thanks.--b. On Thu, Feb 13, 2020 at 08:33:59PM +0530, madhuparnabhowmik10@gmail.com wrote: > From: Madhuparna Bhowmik > > list_for_each_entry_rcu() has built-in RCU and lock checking. > > Pass cond argument to list_for_each_entry_rcu() to silence > false lockdep warning when CONFIG_PROVE_RCU_LIST is enabled > by default. > > Signed-off-by: Madhuparna Bhowmik > --- > fs/nfsd/filecache.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c > index 32a9bf22ac08..547d2d8bde62 100644 > --- a/fs/nfsd/filecache.c > +++ b/fs/nfsd/filecache.c > @@ -736,7 +736,7 @@ nfsd_file_find_locked(struct inode *inode, unsigned int may_flags, > unsigned char need = may_flags & NFSD_FILE_MAY_MASK; > > hlist_for_each_entry_rcu(nf, &nfsd_file_hashtbl[hashval].nfb_head, > - nf_node) { > + nf_node, lockdep_is_held(&nfsd_file_hashtbl[hashval].nfb_lock)) { > if ((need & nf->nf_may) != need) > continue; > if (nf->nf_inode != inode) > -- > 2.17.1