--- xinu/sys/insertd.c	2018/04/24 17:39:02	1.1.1.1
+++ xinu/sys/insertd.c	2018/04/24 17:39:19	1.1.1.2
@@ -13,13 +13,12 @@ insertd(pid, head, key)
 	int	head;
 	int	key;
 {
-
 	int	next;			/* runs through list		*/
 	int	prev;			/* follows next through list	*/
 
-	if (key < 0 || key > MAXSHORT)
-		return (SYSERR);
-
+#ifdef	DEBUG
+	dotrace("insertd", &pid, 3);
+#endif
 	for(prev=head,next=q[head].qnext ;
 	    q[next].qkey < key ; prev=next,next=q[next].qnext)
 		key -= q[next].qkey;