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lockdep: Fix lockdep_no_validate against IRQ states 

Thomas noticed that a lock marked with lockdep_set_novalidate_class()
will still trigger warnings for IRQ inversions. Cure this by skipping
those when marking irq state.

Reported-and-tested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-2dp5vmpsxeraqm42kgww6ge2@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2011-07-07 11:39:45 +02:00 committed by Ingo Molnar
parent 4582c0a486
commit efbe2eee6d
1 changed files with 3 additions and 0 deletions
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3
kernel/lockdep.c
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@ -2468,6 +2468,9 @@ mark_held_locks(struct task_struct *curr, enum mark_type mark)
BUG_ON(usage_bit >= LOCK_USAGE_STATES);
if (hlock_class(hlock)->key == &__lockdep_no_validate__)
continue;
if (!mark_lock(curr, hlock, usage_bit))
return 0;
}