--- xinu/h/mark.h	2018/04/24 17:39:02	1.1.1.1
+++ xinu/h/mark.h	2018/04/24 17:39:08	1.1.1.2
@@ -1,4 +1,4 @@
-/* mark.h - marked, unmarked */
+/* mark.h - unmarked */
 
 #ifndef	MAXMARK
 #define	MAXMARK	20		/* maximum number of marked locations	*/
@@ -12,5 +12,4 @@ typedef	int	MARKER[1];	/* by declaring i
 				/* &'s don't become a problem		*/
 
 #define	unmarked(L)		(L[0]<0 || L[0]>=nmarks || marks[L[0]]!=L)
-#define	marked(L)		!unmarked(L)
 #endif