re #13613 rb4516 Tunables needs volatile keyword

@@ -20,10 +20,13 @@
  */
 /*
  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
+/*
+ * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
+ */
 
 /*
  * IP interface to squeues.
  *
  * IP uses squeues to force serialization of packets, both incoming and

@@ -145,11 +148,11 @@
 /*
  * ip_squeue_worker_wait: global value for the sq_wait field for all squeues
  *      created. This is the time squeue code waits before waking up the worker
  *      thread after queuing a request.
  */
-uint_t ip_squeue_worker_wait = 10;
+volatile uint_t ip_squeue_worker_wait = 10;
 
 static squeue_t *ip_squeue_create(pri_t);
 static squeue_set_t *ip_squeue_set_create(processorid_t);
 static int ip_squeue_cpu_setup(cpu_setup_t, int, void *);
 static void ip_squeue_set_move(squeue_t *, squeue_set_t *);