On Thu, Jul 26, 2012 at 12:55 PM, Rafael J. Wysocki <r...@sisk.pl> wrote: > On Wednesday, July 25, 2012, Colin Cross wrote: >> The cpu hotplug notifier gets called in both atomic and non-atomic >> contexts, it is not always safe to lock a mutex. Filter out all events >> except the six necessary ones, which are all sleepable, before taking >> the mutex. > > I wonder what mutual exclusion mechanis we rely on when the mutex is not > taken?
We don't need any mutual exclusion because the notifier returns immediately. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
