re #13613 rb4516 Tunables needs volatile keyword

*** 20,32 ****
   */
  /*
   * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  /*
   * This file contains global data and code shared between master and slave parts
   * of the pseudo-terminal driver.
   *
   * Pseudo terminals (or pt's for short) are allocated dynamically.
--- 20,33 ----
   */
  /*
   * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
+ /*
+  * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
+  */
  
  /*
   * This file contains global data and code shared between master and slave parts
   * of the pseudo-terminal driver.
   *
   * Pseudo terminals (or pt's for short) are allocated dynamically.
*** 192,205 ****
  #define PTY_MAXDELTA 128
  
  /*
   * Tuneable variables.
   */
! uint_t  pt_cnt = 0;                     /* Minimum number of ptys */
! size_t  pt_max_pty = 0;                 /* Maximum number of ptys */
  uint_t  pt_init_cnt = NPTY_INITIAL;     /* Initial number of ptms slots */
! uint_t  pt_pctofmem = NPTY_PERCENT;     /* Percent of memory to use for ptys */
  uint_t  pt_maxdelta = PTY_MAXDELTA;     /* Max increment for slot table size */
  
  /* Other global variables */
  
  kmutex_t ptms_lock;                     /* Global data access lock */
--- 193,207 ----
  #define PTY_MAXDELTA 128
  
  /*
   * Tuneable variables.
   */
! volatile uint_t pt_cnt = 0;             /* Minimum number of ptys */
! volatile size_t pt_max_pty = 0;         /* Maximum number of ptys */
  uint_t  pt_init_cnt = NPTY_INITIAL;     /* Initial number of ptms slots */
! volatile uint_t pt_pctofmem = NPTY_PERCENT;     /* Percent of memory to use */
!                                                 /* for ptys */
  uint_t  pt_maxdelta = PTY_MAXDELTA;     /* Max increment for slot table size */
  
  /* Other global variables */
  
  kmutex_t ptms_lock;                     /* Global data access lock */