From mboxrd@z Thu Jan  1 00:00:00 1970
From: Al Viro <viro@ZenIV.linux.org.uk>
Subject: Re: [PATCH] vfs, freeze: use ACCESS_ONCE() to guard access to
 ->mnt_flags
Date: Fri, 16 Nov 2012 13:25:39 +0000
Message-ID: <20121116132539.GV2616@ZenIV.linux.org.uk>
References: <50A60626.4080200@cn.fujitsu.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Cc: Linux Fsdevel <linux-fsdevel@vger.kernel.org>,
	Jan Kara <jack@suse.cz>
To: Miao Xie <miaox@cn.fujitsu.com>
Return-path: <linux-fsdevel-owner@vger.kernel.org>
Received: from zeniv.linux.org.uk ([195.92.253.2]:33168 "EHLO
	ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1751624Ab2KPNZl (ORCPT
	<rfc822;linux-fsdevel@vger.kernel.org>);
	Fri, 16 Nov 2012 08:25:41 -0500
Content-Disposition: inline
In-Reply-To: <50A60626.4080200@cn.fujitsu.com>
Sender: linux-fsdevel-owner@vger.kernel.org
List-ID: <linux-fsdevel.vger.kernel.org>

On Fri, Nov 16, 2012 at 05:23:50PM +0800, Miao Xie wrote:
> The compiler may optimize the while loop and make the check just be done once,
> so we should use ACCESS_ONCE() to guard access to ->mnt_flags

Applied.