re #13613 rb4516 Tunables needs volatile keyword

@@ -19,18 +19,20 @@
  * CDDL HEADER END
  */
 
 /*
  * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
  */
 
 #include <sys/types.h>
 #include <sys/strlog.h>
 #include <sys/policy.h>
 #include <sys/strsun.h>
 #include <sys/squeue_impl.h>
 #include <sys/squeue.h>
+#include <sys/vmsystm.h>
 
 #include <inet/common.h>
 #include <inet/ip.h>
 #include <inet/tcp.h>
 #include <inet/tcp_impl.h>

@@ -502,11 +504,10 @@
 tcp_reclaim_timer(void *arg)
 {
         tcp_stack_t *tcps = (tcp_stack_t *)arg;
         int64_t tot_conn = 0;
         int i;
-        extern pgcnt_t lotsfree, needfree;
 
         for (i = 0; i < tcps->tcps_sc_cnt; i++)
                 tot_conn += tcps->tcps_sc[i]->tcp_sc_conn_cnt;
 
         /*

@@ -544,11 +545,10 @@
 tcp_conn_reclaim(void *arg)
 {
         netstack_handle_t nh;
         netstack_t *ns;
         tcp_stack_t *tcps;
-        extern pgcnt_t lotsfree, needfree;
 
         if (!tcp_do_reclaim)
                 return;
 
         /*