> 在 2017年2月22日，上午5:55，Shaohua Li <shli@xxxxxx> 写道： > > Commit 03a9e24(md linear: fix a race between linear_add() and > linear_congested()) introduces the warnning. > > Cc: Coly Li <colyli@xxxxxxx> > Signed-off-by: Shaohua Li <shli@xxxxxx> Acked-by: Coly Li <colyli@xxxxxxx> Thanks for the fix ! Coly > --- > 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 789008b..5b06b0d 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"); > -- > 2.9.3 > -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
