4374 dn_free_ranges should use range_tree_t
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Max Grossman <max.grossman@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com
Reviewed by: Garrett D'Amore <garrett@damore.org>
Reviewed by: Dan McDonald <danmcd@omniti.com>
Approved by: Dan McDonald <danmcd@omniti.com>

*** 22,32 ****
   * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  /*
!  * Copyright (c) 2013 by Delphix. All rights reserved.
   */
  
  #ifndef _SYS_RANGE_TREE_H
  #define _SYS_RANGE_TREE_H
  
--- 22,32 ----
   * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  /*
!  * Copyright (c) 2013, 2014 by Delphix. All rights reserved.
   */
  
  #ifndef _SYS_RANGE_TREE_H
  #define _SYS_RANGE_TREE_H
  
*** 83,92 ****
--- 83,93 ----
  void range_tree_swap(range_tree_t **rtsrc, range_tree_t **rtdst);
  void range_tree_stat_verify(range_tree_t *rt);
  
  void range_tree_add(void *arg, uint64_t start, uint64_t size);
  void range_tree_remove(void *arg, uint64_t start, uint64_t size);
+ void range_tree_clear(range_tree_t *rt, uint64_t start, uint64_t size);
  
  void range_tree_vacate(range_tree_t *rt, range_tree_func_t *func, void *arg);
  void range_tree_walk(range_tree_t *rt, range_tree_func_t *func, void *arg);
  
  #ifdef  __cplusplus