/* Initialize the extent tree @tree. Should be called for each new inode or other user of the extent_map interface.  */
void extent_map_tree_init(struct extent_map_tree *tree, gfp_t mask)
/* Initialize the extent tree @tree. Should be called for each new inode or other user of the extent_map interface.  */
void extent_map_tree_init(struct extent_map_tree *tree, gfp_t mask)
{
	tree->map.rb_node = NULL;
	rwlock_init(&tree->lock);
}