[PATCH] Add SA_PERCPU_IRQ flag support

[Dimitri Sivanich <sivanich@sgi.com>]

The generic request_irq/setup_irq code should support the SA_PERCPU_IRQ flag.

This patch was posted previously, but this one should build on all arch's.

Signed-off-by: Dimitri Sivanich <sivanich@sgi.com>

Index: linux-2.6.15/kernel/irq/manage.c
===================================================================
--- linux-2.6.15.orig/kernel/irq/manage.c	2006-03-20 13:11:01.766522017 -0600
+++ linux-2.6.15/kernel/irq/manage.c	2006-03-21 15:26:12.305876769 -0600
@@ -206,6 +206,10 @@ int setup_irq(unsigned int irq, struct i
 	 * The following block of code has to be executed atomically
 	 */
 	spin_lock_irqsave(&desc->lock,flags);
+#if defined(ARCH_HAS_IRQ_PER_CPU) && defined(SA_PERCPU_IRQ)
+	if (new->flags & SA_PERCPU_IRQ)
+		desc->status |= IRQ_PER_CPU;
+#endif
 	p = &desc->action;
 	if ((old = *p) != NULL) {
 		/* Can't share interrupts unless both agree to */