[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/char/ctrlchar.c b/drivers/s390/char/ctrlchar.c
index d83eb63..49e9628 100644
--- a/drivers/s390/char/ctrlchar.c
+++ b/drivers/s390/char/ctrlchar.c
@@ -20,7 +20,7 @@
 static void
 ctrlchar_handle_sysrq(void *tty)
 {
-	handle_sysrq(ctrlchar_sysrq_key, NULL, (struct tty_struct *) tty);
+	handle_sysrq(ctrlchar_sysrq_key, (struct tty_struct *) tty);
 }
 
 static DECLARE_WORK(ctrlchar_work, ctrlchar_handle_sysrq, NULL);