--- xinu/sys/signal.c	2018/04/24 17:39:04	1.1.1.1
+++ xinu/sys/signal.c	2018/04/24 17:40:02	1.1.1.2
@@ -11,18 +11,17 @@
  *------------------------------------------------------------------------
  */
 SYSCALL signal(sem)
-register int	sem;
+	int	sem;
 {
 	register struct	sentry	*sptr;
-	PStype	ps;
 
-	disable(ps);
+	disable();
 	if (isbadsem(sem) || (sptr= &semaph[sem])->sstate==SFREE) {
-		restore(ps);
+		restore();
 		return(SYSERR);
 	}
 	if ((sptr->semcnt++) < 0)
 		ready(getfirst(sptr->sqhead), RESCHYES);
-	restore(ps);
+	restore();
 	return(OK);
 }