--- Net2/vm/vm_kern.h	2018/04/24 18:03:57	1.1.1.1
+++ Net2/vm/vm_kern.h	2018/04/24 18:15:09	1.1.1.3
@@ -33,7 +33,8 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	@(#)vm_kern.h	7.2 (Berkeley) 4/21/91
+ *	from: @(#)vm_kern.h	7.2 (Berkeley) 4/21/91
+ *	vm_kern.h,v 1.4 1993/07/07 06:04:13 cgd Exp
  *
  *
  * Copyright (c) 1987, 1990 Carnegie-Mellon University.
@@ -62,6 +63,9 @@
  * rights to redistribute these changes.
  */
 
+#ifndef _VM_VM_KERN_H_
+#define _VM_VM_KERN_H_
+
 /*
  *	Kernel memory management definitions.
  */
@@ -80,6 +84,8 @@ void		kmem_free_wakeup();
 vm_map_t	kernel_map;
 vm_map_t	mb_map;
 vm_map_t	kmem_map;
-vm_map_t	exec_map;
+/* vm_map_t	exec_map;  -- not used - cgd */
 vm_map_t	phys_map;
 vm_map_t	buffer_map;
+
+#endif /* !_VM_VM_KERN_H_ */