7158 	struct extent_map_tree *map_tree = &fs_info->mapping_tree;  in read_one_chunk()  local
7194 	read_lock(&map_tree->lock);  in read_one_chunk()
7195 	em = lookup_extent_mapping(map_tree, logical, 1);  in read_one_chunk()
7196 	read_unlock(&map_tree->lock);  in read_one_chunk()
7263 	write_lock(&map_tree->lock);  in read_one_chunk()
7264 	ret = add_extent_mapping(map_tree, em, 0);  in read_one_chunk()
7265 	write_unlock(&map_tree->lock);  in read_one_chunk()
7581 	struct extent_map_tree *map_tree = &fs_info->mapping_tree;  in btrfs_check_rw_degradable()  local
7586 	read_lock(&map_tree->lock);  in btrfs_check_rw_degradable()
7587 	em = lookup_extent_mapping(map_tree, 0, (u64)-1);  in btrfs_check_rw_degradable()
7588 	read_unlock(&map_tree->lock);  in btrfs_check_rw_degradable()
7626 		read_lock(&map_tree->lock);  in btrfs_check_rw_degradable()
7627 		em = lookup_extent_mapping(map_tree, next_start,  in btrfs_check_rw_degradable()
7629 		read_unlock(&map_tree->lock);  in btrfs_check_rw_degradable()