re #13613 rb4516 Tunables needs volatile keyword

*** 19,33 ****
   * CDDL HEADER END
   */
  /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  /*        All Rights Reserved   */
  
- 
  /*
   * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  #include <sys/types.h>
  #include <sys/t_lock.h>
  #include <sys/param.h>
  #include <sys/tuneable.h>
--- 19,35 ----
   * CDDL HEADER END
   */
  /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  /*        All Rights Reserved   */
  
  /*
   * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
+ /*
+  * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
+  */
  
  #include <sys/types.h>
  #include <sys/t_lock.h>
  #include <sys/param.h>
  #include <sys/tuneable.h>
*** 55,66 ****
  #include <vm/hat.h>
  #include <vm/page.h>
  #include <vm/pvn.h>
  #include <vm/seg_kmem.h>
  
! int doiflush = 1;       /* non-zero to turn inode flushing on */
! int dopageflush = 1;    /* non-zero to turn page flushing on */
  
  /*
   * To improve boot performance, don't run the inode flushing loop until
   * the specified number of seconds after boot.  To revert to the old
   * behavior, set fsflush_iflush_delay to 0.  We have not created any new
--- 57,68 ----
  #include <vm/hat.h>
  #include <vm/page.h>
  #include <vm/pvn.h>
  #include <vm/seg_kmem.h>
  
! volatile int doiflush = 1;      /* non-zero to turn inode flushing on */
! volatile int dopageflush = 1;   /* non-zero to turn page flushing on */
  
  /*
   * To improve boot performance, don't run the inode flushing loop until
   * the specified number of seconds after boot.  To revert to the old
   * behavior, set fsflush_iflush_delay to 0.  We have not created any new