re #13613 rb4516 Tunables needs volatile keyword

*** 20,29 ****
--- 20,32 ----
   */
  /*
   * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
+ /*
+  * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
+  */
  
  /*
   *      Copyright (c) 1983,1984,1985,1986,1987,1988,1989 AT&T.
   *      All rights reserved.
   */
*** 1662,1672 ****
                  crfree(ncrfree);
  
          return (error);
  }
  
! static int nfs3_do_symlink_cache = 1;
  
  /* ARGSUSED */
  static int
  nfs3_readlink(vnode_t *vp, struct uio *uiop, cred_t *cr, caller_context_t *ct)
  {
--- 1665,1675 ----
                  crfree(ncrfree);
  
          return (error);
  }
  
! volatile int nfs3_do_symlink_cache = 1;
  
  /* ARGSUSED */
  static int
  nfs3_readlink(vnode_t *vp, struct uio *uiop, cred_t *cr, caller_context_t *ct)
  {
*** 1991,2001 ****
                  VN_RELE(avp);
  
          return (error);
  }
  
! static int nfs3_lookup_neg_cache = 1;
  
  #ifdef DEBUG
  static int nfs3_lookup_dnlc_hits = 0;
  static int nfs3_lookup_dnlc_misses = 0;
  static int nfs3_lookup_dnlc_neg_hits = 0;
--- 1994,2004 ----
                  VN_RELE(avp);
  
          return (error);
  }
  
! volatile int nfs3_lookup_neg_cache = 1;
  
  #ifdef DEBUG
  static int nfs3_lookup_dnlc_hits = 0;
  static int nfs3_lookup_dnlc_misses = 0;
  static int nfs3_lookup_dnlc_neg_hits = 0;
*** 3697,3707 ****
  static int nfs3_readdir_cache_waits = 0;
  static int nfs3_readdir_cache_misses = 0;
  static int nfs3_readdir_readahead = 0;
  #endif
  
! static int nfs3_shrinkreaddir = 0;
  
  /*
   * Read directory entries.
   * There are some weird things to look out for here.  The uio_loffset
   * field is either 0 or it is the offset returned from a previous
--- 3700,3710 ----
  static int nfs3_readdir_cache_waits = 0;
  static int nfs3_readdir_cache_misses = 0;
  static int nfs3_readdir_readahead = 0;
  #endif
  
! volatile int nfs3_shrinkreaddir = 0;
  
  /*
   * Read directory entries.
   * There are some weird things to look out for here.  The uio_loffset
   * field is either 0 or it is the offset returned from a previous
*** 4516,4526 ****
  }
  
  /*
   * number of nfs3_bsize blocks to read ahead.
   */
! static int nfs3_nra = 4;
  
  #ifdef DEBUG
  static int nfs3_lostpage = 0;   /* number of times we lost original page */
  #endif
  
--- 4519,4529 ----
  }
  
  /*
   * number of nfs3_bsize blocks to read ahead.
   */
! volatile int nfs3_nra = 4;
  
  #ifdef DEBUG
  static int nfs3_lostpage = 0;   /* number of times we lost original page */
  #endif
  
*** 5704,5714 ****
          dmapp->caller->error = error;
          (void) as_delete_callback(as, arg);
          kmem_free(dmapp, sizeof (nfs_delmap_args_t));
  }
  
! static int nfs3_pathconf_disable_cache = 0;
  
  #ifdef DEBUG
  static int nfs3_pathconf_cache_hits = 0;
  static int nfs3_pathconf_cache_misses = 0;
  #endif
--- 5707,5717 ----
          dmapp->caller->error = error;
          (void) as_delete_callback(as, arg);
          kmem_free(dmapp, sizeof (nfs_delmap_args_t));
  }
  
! volatile int nfs3_pathconf_disable_cache = 0;
  
  #ifdef DEBUG
  static int nfs3_pathconf_cache_hits = 0;
  static int nfs3_pathconf_cache_misses = 0;
  #endif