On Wed, 2007-11-14 at 22:42 +0000, Pavel Machek wrote: > On Wed 2007-11-14 22:25:57, Rafael J. Wysocki wrote: > > [Andrew, please consider this as 2.6.24 material, thanks.] > > --- > > From: Johannes Berg <johannes@xxxxxxxxxxxxxxxx> > > > > Lockdep reports a circular locking dependency in the hibernate code > > because > > - during system boot hibernate code (from an initcall) locks pm_mutex > > and then a sysfs buffer mutex via name_to_dev_t > > - during regular operation hibernate code locks pm_mutex under a > > sysfs buffer mutex because it's called from sysfs methods. > > > > The deadlock can never happen because during initcall invocation nothing > > can write to sysfs yet. This removes the lockdep report by marking the > > initcall locking as being in a different class. > > > > Signed-off-by: Johannes Berg <johannes@xxxxxxxxxxxxxxxx> > > Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> > > Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> I guess mine got lost too :-) Acked-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> > > Cc: Pavel Machek <pavel@xxxxxx> > > ACK... > _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
