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>

2 files changed, 12 insertions, 20 deletions

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 7c07a09931db..19770923bcb0 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -280,7 +280,7 @@ static inline int irq_balancing_disabled(unsigned int irq)
 }
 
 /* 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 @@ static inline void generic_handle_irq(unsigned int irq)
 
 /* 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);
diff --git a/include/linux/irqreturn.h b/include/linux/irqreturn.h
index 881883c2009d..c5584ca5b8c9 100644
--- a/include/linux/irqreturn.h
+++ b/include/linux/irqreturn.h
@@ -1,25 +1,17 @@
-/* irqreturn.h */
 #ifndef _LINUX_IRQRETURN_H
 #define _LINUX_IRQRETURN_H
 
-/*
- * For 2.4.x compatibility, 2.4.x can use
- *
- *      typedef void irqreturn_t;
- *      #define IRQ_NONE
- *      #define IRQ_HANDLED
- *      #define IRQ_RETVAL(x)
- *
- * To mix old-style and new-style irq handler returns.
- *
- * IRQ_NONE means we didn't handle it.
- * IRQ_HANDLED means that we did have a valid interrupt and handled it.
- * IRQ_RETVAL(x) selects on the two depending on x being non-zero (for handled)
+/**
+ * enum irqreturn
+ * @IRQ_NONE            interrupt was not from this device
+ * @IRQ_HANDLED         interrupt was handled by this device
  */
-typedef int irqreturn_t;
+enum irqreturn {
+        IRQ_NONE,
+        IRQ_HANDLED,
+};
 
-#define IRQ_NONE        (0)
-#define IRQ_HANDLED     (1)
-#define IRQ_RETVAL(x)   ((x) != 0)
+typedef enum irqreturn irqreturn_t;
+#define IRQ_RETVAL(x)   ((x) != IRQ_NONE)
 
 #endif