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[PATCH] genirq: sem2mutex probe_sem -> probing_active 

Convert the irq auto-probing semaphore to a mutex.  (This allows us to find
probing API usage bugs sooner, via the mutex debugging code.)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ingo Molnar 2006-06-29 02:24:37 -07:00 committed by Linus Torvalds
parent d1bef4ed5f
commit 74ffd553a3
1 changed files with 5 additions and 4 deletions
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9
kernel/irq/autoprobe.c
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@ -16,7 +16,7 @@
* comes in on to an unassigned handler will get stuck with
* "IRQ_WAITING" cleared and the interrupt disabled.
*/
static DECLARE_MUTEX(probe_sem);
static DEFINE_MUTEX(probing_active);
/**
* probe_irq_on - begin an interrupt autodetect
@ -31,7 +31,7 @@ unsigned long probe_irq_on(void)
irq_desc_t *desc;
unsigned int i;
down(&probe_sem);
mutex_lock(&probing_active);
/*
* something may have generated an irq long ago and we want to
* flush such a longstanding irq before considering it as spurious.
@ -132,7 +132,7 @@ unsigned int probe_irq_mask(unsigned long val)
}
spin_unlock_irq(&desc->lock);
}
up(&probe_sem);
mutex_unlock(&probing_active);
return mask & val;
}
@ -177,10 +177,11 @@ int probe_irq_off(unsigned long val)
}
spin_unlock_irq(&desc->lock);
}
up(&probe_sem);
mutex_unlock(&probing_active);
if (nr_irqs > 1)
irq_found = -irq_found;
return irq_found;
}