[S390] workqueue fixes.

Cc: David Howells <dhowells@redhat.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/char/ctrlchar.c

@@ -16,14 +16,15 @@
 
 #ifdef CONFIG_MAGIC_SYSRQ
 static int ctrlchar_sysrq_key;
+static struct tty_struct *sysrq_tty;
 
 static void
-ctrlchar_handle_sysrq(void *tty)
+ctrlchar_handle_sysrq(struct work_struct *work)
 {
-	handle_sysrq(ctrlchar_sysrq_key, (struct tty_struct *) tty);
+	handle_sysrq(ctrlchar_sysrq_key, sysrq_tty);
 }
 
-static DECLARE_WORK(ctrlchar_work, ctrlchar_handle_sysrq, NULL);
+static DECLARE_WORK(ctrlchar_work, ctrlchar_handle_sysrq);
 #endif
 
 
@@ -53,7 +54,7 @@ ctrlchar_handle(const unsigned char *buf, int len, struct tty_struct *tty)
 	/* racy */
 	if (len == 3 && buf[1] == '-') {
 		ctrlchar_sysrq_key = buf[2];
-		ctrlchar_work.data = tty;
+		sysrq_tty = tty;
 		schedule_work(&ctrlchar_work);
 		return CTRLCHAR_SYSRQ;
 	}