AcoSail/kernel_optimize_test
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irq: further clean up the free_irq() code flow

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Linus noticed that the 'pp' variable can be eliminated
altogether, and the loop can be cleaned up further.

Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2009-02-17 20:28:29 +01:00
parent ae88a23b32
commit 8316e38100
1 changed files with 4 additions and 7 deletions
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11
kernel/irq/manage.c
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@ -575,7 +575,7 @@ int setup_irq(unsigned int irq, struct irqaction *act)
void free_irq(unsigned int irq, void *dev_id)
{
struct irq_desc *desc = irq_to_desc(irq);
struct irqaction *action, **p, **pp;
struct irqaction *action, **p;
unsigned long flags;
WARN(in_interrupt(), "Trying to free IRQ %d from IRQ context!\n", irq);
@ -592,7 +592,6 @@ void free_irq(unsigned int irq, void *dev_id)
p = &desc->action;
for (;;) {
action = *p;
pp = p;
if (!action) {
WARN(1, "Trying to free already-free IRQ %d\n", irq);
@ -601,15 +600,13 @@ void free_irq(unsigned int irq, void *dev_id)
return;
}
p = &action->next;
if (action->dev_id != dev_id)
continue;
if (action->dev_id == dev_id)
break;
p = &action->next;
}
/* Found it - now remove it from the list of entries: */
*pp = action->next;
*p = action->next;
/* Currently used only by UML, might disappear one day: */
#ifdef CONFIG_IRQ_RELEASE_METHOD