From f5163427453bc6ca2dd497eeb3e7a30d1c74b487 Mon Sep 17 00:00:00 2001 From: Dimitri Sivanich Date: Sat, 25 Mar 2006 03:08:23 -0800 Subject: [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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/irq/manage.c | 23 ++++++++++++++++++----- 1 file changed, 18 insertions(+), 5 deletions(-) (limited to 'kernel/irq') diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 97d5559997d2..6edfcef291e8 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -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; } /** -- cgit v1.2.3