re #13613 rb4516 Tunables needs volatile keyword

*** 20,29 ****
--- 20,32 ----
   */
  /*
   * 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
*** 145,155 ****
  /*
   * 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;
  
  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 *);
--- 148,158 ----
  /*
   * 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.
   */
! 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 *);