From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:42790 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752309AbdJSNUH (ORCPT ); Thu, 19 Oct 2017 09:20:07 -0400 Subject: Patch "md/linear: shutup lockdep warnning" has been added to the 4.4-stable tree To: shli@fb.com, alexander.levin@verizon.com, colyli@suse.de, gregkh@linuxfoundation.org Cc: , From: Date: Thu, 19 Oct 2017 15:19:51 +0200 Message-ID: <150841919173102@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled md/linear: shutup lockdep warnning to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: md-linear-shutup-lockdep-warnning.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From foo@baz Thu Oct 19 15:15:46 CEST 2017 From: Shaohua Li Date: Tue, 21 Feb 2017 11:57:01 -0800 Subject: md/linear: shutup lockdep warnning From: Shaohua Li [ Upstream commit d939cdfde34f50b95254b375f498447c82190b3e ] Commit 03a9e24(md linear: fix a race between linear_add() and linear_congested()) introduces the warnning. Acked-by: Coly Li Signed-off-by: Shaohua Li Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/md/linear.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/md/linear.c +++ b/drivers/md/linear.c @@ -223,7 +223,8 @@ static int linear_add(struct mddev *mdde * oldconf until no one uses it anymore. */ mddev_suspend(mddev); - oldconf = rcu_dereference(mddev->private); + oldconf = rcu_dereference_protected(mddev->private, + lockdep_is_held(&mddev->reconfig_mutex)); mddev->raid_disks++; WARN_ONCE(mddev->raid_disks != newconf->raid_disks, "copied raid_disks doesn't match mddev->raid_disks"); Patches currently in stable-queue which might be from shli@fb.com are queue-4.4/md-linear-shutup-lockdep-warnning.patch