6744 	struct extent_map_tree *map_tree = &fs_info->mapping_tree;  in read_one_chunk()  local
6780 	read_lock(&map_tree->lock);  in read_one_chunk()
6781 	em = lookup_extent_mapping(map_tree, logical, 1);  in read_one_chunk()
6782 	read_unlock(&map_tree->lock);  in read_one_chunk()
6848 	write_lock(&map_tree->lock);  in read_one_chunk()
6849 	ret = add_extent_mapping(map_tree, em, 0);  in read_one_chunk()
6850 	write_unlock(&map_tree->lock);  in read_one_chunk()
7166 	struct extent_map_tree *map_tree = &fs_info->mapping_tree;  in btrfs_check_rw_degradable()  local
7171 	read_lock(&map_tree->lock);  in btrfs_check_rw_degradable()
7172 	em = lookup_extent_mapping(map_tree, 0, (u64)-1);  in btrfs_check_rw_degradable()
7173 	read_unlock(&map_tree->lock);  in btrfs_check_rw_degradable()
7211 		read_lock(&map_tree->lock);  in btrfs_check_rw_degradable()
7212 		em = lookup_extent_mapping(map_tree, next_start,  in btrfs_check_rw_degradable()
7214 		read_unlock(&map_tree->lock);  in btrfs_check_rw_degradable()