2619 asynchronous destruction of ZFS file systems
2747 SPA versioning with zfs feature flags
Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <gwilson@delphix.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Reviewed by: Dan Kruchinin <dan.kruchinin@gmail.com>
Approved by: Dan McDonald <danmcd@nexenta.com>

*** 21,30 ****
--- 21,34 ----
  /*
   * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
+ /*
+  * Copyright (c) 2012 by Delphix. All rights reserved.
+  */
+ 
  /* LINTLIBRARY */
  /* PROTOLIB1 */
  
  #include <sys/zfs_context.h>
  #include <sys/list.h>
*** 50,57 ****
--- 54,63 ----
  #include <sys/dbuf.h>
  #include <sys/zio_checksum.h>
  #include <sys/ddt.h>
  #include <sys/sa.h>
  #include <sys/zfs_sa.h>
+ #include <sys/zfeature.h>
  
  extern uint64_t metaslab_gang_bang;
  extern uint64_t metaslab_df_alloc_threshold;
+ extern boolean_t zfeature_checks_disable;