genirq: make irqreturn_t an enum

Impact: cleanup

Remove the 2.4 compabiliy cruft

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Peter Zijlstra <peterz@infradead.org>

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 7c07a09..1977092 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -280,7 +280,7 @@
 }
 
 /* Handle irq action chains: */
-extern int handle_IRQ_event(unsigned int irq, struct irqaction *action);
+extern irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action);
 
 /*
  * Built-in IRQ handlers for various IRQ types,
@@ -325,7 +325,7 @@
 
 /* Handling of unhandled and spurious interrupts: */
 extern void note_interrupt(unsigned int irq, struct irq_desc *desc,
-			   int action_ret);
+			   irqreturn_t action_ret);
 
 /* Resending of interrupts :*/
 void check_irq_resend(struct irq_desc *desc, unsigned int irq);