--- Net2/sys/reboot.h	2018/04/24 18:03:58	1.1.1.1
+++ Net2/sys/reboot.h	2018/04/24 18:16:15	1.1.1.2
@@ -30,9 +30,13 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	@(#)reboot.h	7.6 (Berkeley) 6/28/90
+ *	from: @(#)reboot.h	7.6 (Berkeley) 6/28/90
+ *	reboot.h,v 1.3 1993/05/20 16:22:55 cgd Exp
  */
 
+#ifndef _SYS_REBOOT_H_
+#define _SYS_REBOOT_H_
+
 /*
  * Arguments to reboot system call.
  * These are passed to boot program in r11,
@@ -85,3 +89,5 @@
 	(((type) << B_TYPESHIFT) | ((adaptor) << B_ADAPTORSHIFT) | \
 	((controller) << B_CONTROLLERSHIFT) | ((unit) << B_UNITSHIFT) | \
 	((partition) << B_PARTITIONSHIFT) | B_DEVMAGIC)
+
+#endif /* !_SYS_REBOOT_H_ */