1151 		struct extent_map_tree *em_tree;  in btrfs_remove_block_group()  local
1153 		em_tree = &fs_info->mapping_tree;  in btrfs_remove_block_group()
1154 		write_lock(&em_tree->lock);  in btrfs_remove_block_group()
1155 		remove_extent_mapping(em_tree, em);  in btrfs_remove_block_group()
1156 		write_unlock(&em_tree->lock);  in btrfs_remove_block_group()
1173 	struct extent_map_tree *em_tree = &fs_info->mapping_tree;  in btrfs_start_trans_remove_block_group()  local
1178 	read_lock(&em_tree->lock);  in btrfs_start_trans_remove_block_group()
1179 	em = lookup_extent_mapping(em_tree, chunk_offset, 1);  in btrfs_start_trans_remove_block_group()
1180 	read_unlock(&em_tree->lock);  in btrfs_start_trans_remove_block_group()
1543 	struct extent_map_tree *em_tree;  in read_bg_from_eb()  local
1554 	em_tree = &fs_info->mapping_tree;  in read_bg_from_eb()
1555 	read_lock(&em_tree->lock);  in read_bg_from_eb()
1556 	em = lookup_extent_mapping(em_tree, key->objectid, key->offset);  in read_bg_from_eb()
1557 	read_unlock(&em_tree->lock);  in read_bg_from_eb()
3407 	struct extent_map_tree *em_tree;  in btrfs_unfreeze_block_group()  local
3417 		em_tree = &fs_info->mapping_tree;  in btrfs_unfreeze_block_group()
3418 		write_lock(&em_tree->lock);  in btrfs_unfreeze_block_group()
3419 		em = lookup_extent_mapping(em_tree, block_group->start,  in btrfs_unfreeze_block_group()
3422 		remove_extent_mapping(em_tree, em);  in btrfs_unfreeze_block_group()
3423 		write_unlock(&em_tree->lock);  in btrfs_unfreeze_block_group()