9017 Introduce taskq_empty()
Reviewed by: Bryan Cantrill <bryan@joyent.com>
Reviewed by: Dan McDonald <danmcd@joyent.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Yuri Pankov <yuripv@yuripv.net>

*** 10,19 ****
--- 10,20 ----
  #
  
  #
  # Copyright 2015 Nexenta Systems, Inc.  All rights reserved.
  # Copyright 2017 RackTop Systems.
+ # Copyright 2018, Joyent, Inc.
  #
  
  #
  # MAPFILE HEADER START
  #
*** 200,209 ****
--- 201,211 ----
          taskq_create_proc;
          taskq_create_sysdc;
          taskq_destroy;
          taskq_dispatch;
          taskq_dispatch_ent;
+         taskq_empty;
          taskq_member;
          taskq_wait;
  
          thread_create;
          thread_join;