--- Net2/vm/vm_prot.h	2018/04/24 18:03:57	1.1.1.1
+++ Net2/vm/vm_prot.h	2018/04/24 18:14:54	1.1.1.2
@@ -33,7 +33,8 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	@(#)vm_prot.h	7.2 (Berkeley) 4/21/91
+ *	from: @(#)vm_prot.h	7.2 (Berkeley) 4/21/91
+ *	vm_prot.h,v 1.3 1993/05/20 03:59:45 cgd Exp
  *
  *
  * Copyright (c) 1987, 1990 Carnegie-Mellon University.
@@ -62,13 +63,13 @@
  * rights to redistribute these changes.
  */
 
+#ifndef _VM_VM_PROT_H_
+#define _VM_VM_PROT_H_
+
 /*
  *	Virtual memory protection definitions.
  */
 
-#ifndef	_VM_PROT_
-#define	_VM_PROT_
-
 /*
  *	Types defined:
  *
@@ -99,4 +100,4 @@ typedef int		vm_prot_t;
 
 #define VM_PROT_ALL	(VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE)
 
-#endif	_VM_PROT_
+#endif /* !_VM_VM_PROT_H_ */