diff --git a/drivers/staging/comedi/interrupt.h b/drivers/staging/comedi/interrupt.h
index 50cf823..d1f0989 100644
--- a/drivers/staging/comedi/interrupt.h
+++ b/drivers/staging/comedi/interrupt.h
@@ -21,13 +21,6 @@
 
 #include <linux/interrupt.h>
 
-#ifndef IRQ_NONE
-typedef void irqreturn_t;
-#define IRQ_NONE
-#define IRQ_HANDLED
-#define IRQ_RETVAL(x) (void)(x)
-#endif
-
 #ifndef IRQF_DISABLED
 #define IRQF_DISABLED           SA_INTERRUPT
 #define IRQF_SAMPLE_RANDOM      SA_SAMPLE_RANDOM