[PATCH] m68knommu: make enable_irq() macro statement

Change enable_irq() macro to be a statement, not expression.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/asm-m68knommu/irq.h

@@ -83,7 +83,7 @@ extern void (*mach_disable_irq)(unsigned int);
 /*
  * Some drivers want these entry points
  */
-#define enable_irq(x)	0
+#define enable_irq(x)	do { } while (0)
 #define disable_irq(x)	do { } while (0)
 #define disable_irq_nosync(x)	disable_irq(x)