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[PATCH] Add SA_PERCPU_IRQ flag support 

Add support for SA_PERCPU_IRQ (only mmtimer.c uses this at this stage).

Signed-off-by: Dimitri Sivanich <sivanich@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Dimitri Sivanich 2006-03-25 03:08:23 -08:00 committed by Linus Torvalds
parent 6cc6b1226b
commit f516342745
1 changed files with 18 additions and 5 deletions
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23
kernel/irq/manage.c
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@ -204,10 +204,14 @@ int setup_irq(unsigned int irq, struct irqaction * new)
p = &desc->action;
if ((old = *p) != NULL) {
/* Can't share interrupts unless both agree to */
if (!(old->flags & new->flags & SA_SHIRQ)) {
spin_unlock_irqrestore(&desc->lock,flags);
return -EBUSY;
}
if (!(old->flags & new->flags & SA_SHIRQ))
goto mismatch;
#if defined(ARCH_HAS_IRQ_PER_CPU) && defined(SA_PERCPU_IRQ)
/* All handlers must agree on per-cpuness */
if ((old->flags & IRQ_PER_CPU) != (new->flags & IRQ_PER_CPU))
goto mismatch;
#endif
/* add new interrupt at end of irq queue */
do {
@ -218,7 +222,10 @@ int setup_irq(unsigned int irq, struct irqaction * new)
}
*p = new;
#if defined(ARCH_HAS_IRQ_PER_CPU) && defined(SA_PERCPU_IRQ)
if (new->flags & SA_PERCPU_IRQ)
desc->status |= IRQ_PER_CPU;
#endif
if (!shared) {
desc->depth = 0;
desc->status &= ~(IRQ_DISABLED | IRQ_AUTODETECT |
@ -236,6 +243,12 @@ int setup_irq(unsigned int irq, struct irqaction * new)
register_handler_proc(irq, new);
return 0;
mismatch:
spin_unlock_irqrestore(&desc->lock, flags);
printk(KERN_ERR "%s: irq handler mismatch\n", __FUNCTION__);
dump_stack();
return -EBUSY;
}
/**