4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>

*** 19,29 ****
   * CDDL HEADER END
   */
  
  /*
   * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
!  * Copyright (c) 2012 by Delphix. All rights reserved.
   * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
   * Copyright (c) 2012, Joyent, Inc. All rights reserved.
   */
  
  /* Portions Copyright 2010 Robert Milkowski */
--- 19,29 ----
   * CDDL HEADER END
   */
  
  /*
   * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
!  * Copyright (c) 2013 by Delphix. All rights reserved.
   * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
   * Copyright (c) 2012, Joyent, Inc. All rights reserved.
   */
  
  /* Portions Copyright 2010 Robert Milkowski */
*** 579,589 ****
   */
  int dmu_free_range(objset_t *os, uint64_t object, uint64_t offset,
          uint64_t size, dmu_tx_t *tx);
  int dmu_free_long_range(objset_t *os, uint64_t object, uint64_t offset,
          uint64_t size);
! int dmu_free_object(objset_t *os, uint64_t object);
  
  /*
   * Convenience functions.
   *
   * Canfail routines will return 0 on success, or an errno if there is a
--- 579,589 ----
   */
  int dmu_free_range(objset_t *os, uint64_t object, uint64_t offset,
          uint64_t size, dmu_tx_t *tx);
  int dmu_free_long_range(objset_t *os, uint64_t object, uint64_t offset,
          uint64_t size);
! int dmu_free_long_object(objset_t *os, uint64_t object);
  
  /*
   * Convenience functions.
   *
   * Canfail routines will return 0 on success, or an errno if there is a