[S390] irq change build fixes.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/block/dasd_diag.c b/drivers/s390/block/dasd_diag.c
index 222a8a7..53db58a 100644
--- a/drivers/s390/block/dasd_diag.c
+++ b/drivers/s390/block/dasd_diag.c
@@ -218,7 +218,7 @@
 
 /* Handle external interruption. */
 static void
-dasd_ext_handler(struct pt_regs *regs, __u16 code)
+dasd_ext_handler(__u16 code)
 {
 	struct dasd_ccw_req *cqr, *next;
 	struct dasd_device *device;