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[PATCH] lockdep: annotate genirq

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Teach special (recursive) locking code to the lock validator.  Has no effect
on non-lockdep kernels.

Signed-off-by: Ingo Molnar <[email protected]>
Signed-off-by: Arjan van de Ven <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Ingo Molnar 2006-07-03 00:25:06 -07:00 • committed by Linus Torvalds
commit 243c7621aa
3 changed files with 23 additions and 0 deletions
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16
kernel/irq/handle.c
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@ -249,3 +249,19 @@ out:
return 1;
}
#ifdef CONFIG_TRACE_IRQFLAGS
/*
* lockdep: we want to handle all irq_desc locks as a single lock-class:
*/
static struct lock_class_key irq_desc_lock_class;
void early_init_irq_lock_class(void)
{
int i;
for (i = 0; i < NR_IRQS; i++)
lockdep_set_class(&irq_desc[i].lock, &irq_desc_lock_class);
}
#endif