From d939cdfde34f50b95254b375f498447c82190b3e Mon Sep 17 00:00:00 2001 From: Shaohua Li Date: Tue, 21 Feb 2017 11:57:01 -0800 Subject: [PATCH] md/linear: shutup lockdep warnning 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 --- drivers/md/linear.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/md/linear.c b/drivers/md/linear.c index 789008bc94ff..5b06b0ddf7a3 100644 --- a/drivers/md/linear.c +++ b/drivers/md/linear.c @@ -224,7 +224,8 @@ static int linear_add(struct mddev *mddev, struct md_rdev *rdev) * 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"); -- 2.30.2