8115 parallel zfs mount

*** 20,29 ****
--- 20,30 ----
   */
  
  /*
   * Copyright (c) 1988, 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
+  * Copyright 2017 RackTop Systems.
   */
  
  /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  /*        All Rights Reserved   */
  
*** 108,118 ****
--- 109,131 ----
  
  extern proc_t p0;               /* process 0 */
  extern struct plock p0lock;     /* p0's plock */
  extern struct pid pid0;         /* p0's pid */
  
+ extern int issig(int);
+ #define ISSIG(thr, why) issig(why)
  
+ /* Reasons for calling issig() */
+ 
+ #define FORREAL         0       /* Usual side-effects */
+ #define JUSTLOOKING     1       /* Don't stop the process */
+ 
+ extern  void    tsd_create(uint_t *, void (*)(void *));
+ extern  void    tsd_destroy(uint_t *);
+ extern  void    *tsd_get(uint_t);
+ extern  int     tsd_set(uint_t, void *);
+ 
  /*
   * This is normally in sunddi.h but
   * I didn't want to drag that in here.
   */
  pid_t