1216 	struct extent_map_tree *em_tree = &inode->extent_tree;  in get_extent_allocation_hint()  local
1220 	read_lock(&em_tree->lock);  in get_extent_allocation_hint()
1221 	em = search_extent_mapping(em_tree, start, num_bytes);  in get_extent_allocation_hint()
1230 			em = search_extent_mapping(em_tree, 0, 0);  in get_extent_allocation_hint()
1240 	read_unlock(&em_tree->lock);  in get_extent_allocation_hint()
6744 	struct extent_map_tree *em_tree = &inode->extent_tree;  in btrfs_get_extent()  local
6746 	read_lock(&em_tree->lock);  in btrfs_get_extent()
6747 	em = lookup_extent_mapping(em_tree, start, len);  in btrfs_get_extent()
6748 	read_unlock(&em_tree->lock);  in btrfs_get_extent()
6907 	write_lock(&em_tree->lock);  in btrfs_get_extent()
6908 	ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, start, len);  in btrfs_get_extent()
6909 	write_unlock(&em_tree->lock);  in btrfs_get_extent()