8115 parallel zfs mount

@@ -20,10 +20,11 @@
  */
 
 /*
  * 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   */
 

@@ -108,11 +109,23 @@
 
 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