8115 parallel zfs mount

*** 23,32 ****
--- 23,33 ----
   * Use is subject to license terms.
   */
  /*
   * Copyright 2012 Garrett D'Amore <garrett@damore.org>.  All rights reserved.
   * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
+  * Copyright 2017 RackTop Systems.
   */
  
  #include <sys/taskq_impl.h>
  
  #include <sys/class.h>
*** 36,45 ****
--- 37,49 ----
  #include <sys/time.h>
  #include <sys/systm.h>
  #include <sys/sysmacros.h>
  #include <sys/unistd.h>
  
+ /* avoid <sys/disp.h> */
+ #define   maxclsyspri     99
+ 
  /* avoid <unistd.h> */
  extern long sysconf(int);
  
  /* avoiding <thread.h> */
  typedef unsigned int thread_t;
*** 261,270 ****
--- 265,283 ----
  {
          return (taskq_create_proc(name, nthr, pri,
              minalloc, maxalloc, NULL, flags));
  }
  
+ /*ARGSUSED*/
+ taskq_t *
+ taskq_create_sysdc(const char *name, int nthr, int minalloc,
+     int maxalloc, proc_t *proc, uint_t dc, uint_t flags)
+ {
+         return (taskq_create_proc(name, nthr, maxclsyspri,
+             minalloc, maxalloc, proc, flags));
+ }
+ 
  /*ARGSUSED*/
  taskq_t *
  taskq_create_proc(const char *name, int nthreads, pri_t pri,
          int minalloc, int maxalloc, proc_t *proc, uint_t flags)
  {