[PATCH] Convert Alpha to the new 2.5 IRQ API

This converts the Alpha architecture to the new IRQ API.  Tested on
Jensen.

arch/alpha/kernel/irq.c

@@ -45,7 +45,10 @@ volatile unsigned long irq_err_count;
  * Special irq handlers.
  */
 
-void no_action(int cpl, void *dev_id, struct pt_regs *regs) { }
+irqreturn_t no_action(int cpl, void *dev_id, struct pt_regs *regs)
+{
+	return IRQ_NONE;
+}
 
 /*
  * Generic no controller code
@@ -414,7 +417,7 @@ init_irq_proc (void)
 }
 
 int
-request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *),
+request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *),
 	    unsigned long irqflags, const char * devname, void *dev_id)
 {
 	int retval;

arch/alpha/kernel/proto.h

 #include <linux/config.h>
+#include <linux/interrupt.h>
 
 
 /* Prototypes of functions used across modules here in this directory.  */
@@ -128,7 +129,7 @@ extern void smp_percpu_timer_interrupt(struct pt_regs *);
 /* extern void reset_for_srm(void); */
 
 /* time.c */
-extern void timer_interrupt(int irq, void *dev, struct pt_regs * regs);
+extern irqreturn_t timer_interrupt(int irq, void *dev, struct pt_regs * regs);
 extern void common_init_rtc(void);
 extern unsigned long est_cycle_freq;
 

arch/alpha/kernel/time.c

@@ -94,7 +94,7 @@ static inline __u32 rpcc(void)
  * timer_interrupt() needs to keep up the real-time clock,
  * as well as call the "do_timer()" routine every clocktick
  */
-void timer_interrupt(int irq, void *dev, struct pt_regs * regs)
+irqreturn_t timer_interrupt(int irq, void *dev, struct pt_regs * regs)
 {
 	unsigned long delta;
 	__u32 now;
@@ -139,6 +139,7 @@ void timer_interrupt(int irq, void *dev, struct pt_regs * regs)
 	}
 
 	write_sequnlock(&xtime_lock);
+	return IRQ_HANDLED;
 }
 
 void