--- Net2/vm/pmap.h	2018/04/24 18:03:57	1.1
+++ Net2/vm/pmap.h	2018/04/24 18:15:01	1.1.1.2
@@ -33,7 +33,8 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	@(#)pmap.h	7.4 (Berkeley) 5/7/91
+ *	from: @(#)pmap.h	7.4 (Berkeley) 5/7/91
+ *	pmap.h,v 1.3 1993/05/20 03:59:13 cgd Exp
  *
  *
  * Copyright (c) 1987, 1990 Carnegie-Mellon University.
@@ -62,14 +63,14 @@
  * rights to redistribute these changes.
  */
 
+#ifndef _VM_PMAP_H_
+#define _VM_PMAP_H_
+
 /*
  *	Machine address mapping definitions -- machine-independent
  *	section.  [For machine-dependent section, see "machine/pmap.h".]
  */
 
-#ifndef	_PMAP_VM_
-#define	_PMAP_VM_
-
 #include <machine/pmap.h>
 
 #ifdef KERNEL
@@ -104,4 +105,4 @@ boolean_t	pmap_access();
 extern pmap_t	kernel_pmap;
 #endif
 
-#endif	_PMAP_VM_
+#endif /* !_VM_PMAP_H_ */