6587 	struct extent_map_tree *map_tree = &fs_info->mapping_tree;  in read_one_chunk()  local
6612 	read_lock(&map_tree->lock);  in read_one_chunk()
6613 	em = lookup_extent_mapping(map_tree, logical, 1);  in read_one_chunk()
6614 	read_unlock(&map_tree->lock);  in read_one_chunk()
6683 	write_lock(&map_tree->lock);  in read_one_chunk()
6684 	ret = add_extent_mapping(map_tree, em, 0);  in read_one_chunk()
6685 	write_unlock(&map_tree->lock);  in read_one_chunk()
7003 	struct extent_map_tree *map_tree = &fs_info->mapping_tree;  in btrfs_check_rw_degradable()  local
7008 	read_lock(&map_tree->lock);  in btrfs_check_rw_degradable()
7009 	em = lookup_extent_mapping(map_tree, 0, (u64)-1);  in btrfs_check_rw_degradable()
7010 	read_unlock(&map_tree->lock);  in btrfs_check_rw_degradable()
7048 		read_lock(&map_tree->lock);  in btrfs_check_rw_degradable()
7049 		em = lookup_extent_mapping(map_tree, next_start,  in btrfs_check_rw_degradable()
7051 		read_unlock(&map_tree->lock);  in btrfs_check_rw_degradable()