OS-3088 need a lighterweight page invalidation mechanism for zone memcap

@@ -21,10 +21,11 @@
 /*
  * Copyright 2014 Garrrett D'Amore <garrett@damore.org>
  *
  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
+ * Copyright 2014 Joyent, Inc.  All rights reserved.
  */
 
 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
 /*        All Rights Reserved   */
 

@@ -189,10 +190,11 @@
 
 #define _RUSAGESYS_GETRUSAGE            0       /* rusage process */
 #define _RUSAGESYS_GETRUSAGE_CHLD       1       /* rusage child process */
 #define _RUSAGESYS_GETRUSAGE_LWP        2       /* rusage lwp */
 #define _RUSAGESYS_GETVMUSAGE           3       /* getvmusage */
+#define _RUSAGESYS_INVALMAP             4       /* vm_map_inval */
 
 #if defined(_SYSCALL32)
 
 struct  rusage32 {
         struct timeval32 ru_utime;      /* user time used */