From: <gregkh@linuxfoundation.org>
To: shli@fb.com, alexander.levin@verizon.com, colyli@suse.de,
gregkh@linuxfoundation.org
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "md/linear: shutup lockdep warnning" has been added to the 4.9-stable tree
Date: Thu, 19 Oct 2017 15:14:27 +0200 [thread overview]
Message-ID: <1508418867178116@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
md/linear: shutup lockdep warnning
to the 4.9-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-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From foo@baz Thu Oct 19 15:04:02 CEST 2017
From: Shaohua Li <shli@fb.com>
Date: Tue, 21 Feb 2017 11:57:01 -0800
Subject: md/linear: shutup lockdep warnning
From: Shaohua Li <shli@fb.com>
[ Upstream commit d939cdfde34f50b95254b375f498447c82190b3e ]
Commit 03a9e24(md linear: fix a race between linear_add() and
linear_congested()) introduces the warnning.
Acked-by: Coly Li <colyli@suse.de>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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-4.9/md-linear-shutup-lockdep-warnning.patch
reply other threads:[~2017-10-19 13:14 UTC|newest]
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