[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/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index a8e6199..6282224 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -339,7 +339,7 @@
  * cpus are handled.
  */
 
-void do_ext_call_interrupt(struct pt_regs *regs, __u16 code)
+void do_ext_call_interrupt(__u16 code)
 {
         unsigned long bits;