8115 parallel zfs mount

*** 22,31 ****
--- 22,32 ----
  /*
   * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright (c) 2011, 2016 by Delphix. All rights reserved.
   * Copyright (c) 2014 Integros [integros.com]
   * Copyright 2017 Nexenta Systems, Inc.
+  * Copyright 2017 RackTop Systems.
   */
  
  #include <stdio.h>
  #include <unistd.h>
  #include <stdio_ext.h>
*** 92,101 ****
--- 93,103 ----
  int zfs_vdev_async_read_max_active;
  #endif
  
  static const char cmdname[] = "zdb";
  uint8_t dump_opt[256];
+ extern int aok;
  
  typedef void object_viewer_t(objset_t *, uint64_t, void *data, size_t size);
  
  uint64_t *zopt_object = NULL;
  static unsigned zopt_objects = 0;