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=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS autolearn=ham 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 64826C43441 for ; Sun, 11 Nov 2018 20:16:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2880D2080D for ; Sun, 11 Nov 2018 20:16:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2880D2080D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=decadent.org.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731948AbeKLGGK (ORCPT ); Mon, 12 Nov 2018 01:06:10 -0500 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:53196 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730491AbeKLGGJ (ORCPT ); Mon, 12 Nov 2018 01:06:09 -0500 Received: from [192.168.4.242] (helo=deadeye) by shadbolt.decadent.org.uk with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1gLvtB-0000oF-RM; Sun, 11 Nov 2018 19:59:22 +0000 Received: from ben by deadeye with local (Exim 4.91) (envelope-from ) id 1gLvsO-0001Pd-O9; Sun, 11 Nov 2018 19:58:32 +0000 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Theodore Ts'o" , "Jan Kara" , "Amir Goldstein" Date: Sun, 11 Nov 2018 19:49:05 +0000 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) Subject: [PATCH 3.16 045/366] vfs: add the sb_start_intwrite_trylock() helper In-Reply-To: X-SA-Exim-Connect-IP: 192.168.4.242 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.61-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Amir Goldstein commit 0c8e3fe35db9b66ae0030849545030ec7c0fc45c upstream. Needed by ext4 to test frozen fs before updating s_last_mounted. Signed-off-by: Amir Goldstein Signed-off-by: Theodore Ts'o Reviewed-by: Jan Kara Signed-off-by: Ben Hutchings --- include/linux/fs.h | 5 +++++ 1 file changed, 5 insertions(+) --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1389,6 +1389,11 @@ static inline void sb_start_intwrite(str __sb_start_write(sb, SB_FREEZE_FS, true); } +static inline int sb_start_intwrite_trylock(struct super_block *sb) +{ + return __sb_start_write(sb, SB_FREEZE_FS, false); +} + extern bool inode_owner_or_capable(const struct inode *inode);