--- Net2/sys/dmap.h	2018/04/24 18:03:58	1.1
+++ Net2/sys/dmap.h	2018/04/24 18:16:31	1.1.1.2
@@ -30,16 +30,18 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	@(#)dmap.h	7.3 (Berkeley) 2/15/91
+ *	from: @(#)dmap.h	7.3 (Berkeley) 2/15/91
+ *	dmap.h,v 1.3 1993/05/20 16:22:06 cgd Exp
  */
 
-#ifndef _DMAP_H_
-#define	_DMAP_H_
+#ifndef _SYS_DMAP_H_
+#define	_SYS_DMAP_H_
 
 /*
  * Definitions for the mapping of vitual swap space to the physical swap
  * area - the disk map.
  */
+
 #define	NDMAP	38		/* size of the swap area map */
 
 struct dmap {
@@ -57,4 +59,5 @@ struct dblock {
 	swblk_t db_base;	/* base of physical contig drum block */
 	swblk_t db_size;	/* size of block */
 };
-#endif	/* !_DMAP_H_ */
+
+#endif	/* !_SYS_DMAP_H_ */