On Sun 2007-11-04 14:59:22, Rafael J. Wysocki wrote: > [Len, please add this patch to the suspend branch, 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> > Cc: Pavel Machek <pavel@xxxxxx> > Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx> ACK. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
