1126 		struct extent_map_tree *em_tree;  in btrfs_remove_block_group()  local
1128 		em_tree = &fs_info->mapping_tree;  in btrfs_remove_block_group()
1129 		write_lock(&em_tree->lock);  in btrfs_remove_block_group()
1130 		remove_extent_mapping(em_tree, em);  in btrfs_remove_block_group()
1131 		write_unlock(&em_tree->lock);  in btrfs_remove_block_group()
1149 	struct extent_map_tree *em_tree = &fs_info->mapping_tree;  in btrfs_start_trans_remove_block_group()  local
1154 	read_lock(&em_tree->lock);  in btrfs_start_trans_remove_block_group()
1155 	em = lookup_extent_mapping(em_tree, chunk_offset, 1);  in btrfs_start_trans_remove_block_group()
1156 	read_unlock(&em_tree->lock);  in btrfs_start_trans_remove_block_group()
1768 	struct extent_map_tree *em_tree;  in read_bg_from_eb()  local
1779 	em_tree = &fs_info->mapping_tree;  in read_bg_from_eb()
1780 	read_lock(&em_tree->lock);  in read_bg_from_eb()
1781 	em = lookup_extent_mapping(em_tree, key->objectid, key->offset);  in read_bg_from_eb()
1782 	read_unlock(&em_tree->lock);  in read_bg_from_eb()
2214 	struct extent_map_tree *em_tree = &fs_info->mapping_tree;  in fill_dummy_bgs()  local
2218 	for (node = rb_first_cached(&em_tree->map); node; node = rb_next(node)) {  in fill_dummy_bgs()
4225 	struct extent_map_tree *em_tree;  in btrfs_unfreeze_block_group()  local
4235 		em_tree = &fs_info->mapping_tree;  in btrfs_unfreeze_block_group()
4236 		write_lock(&em_tree->lock);  in btrfs_unfreeze_block_group()
4237 		em = lookup_extent_mapping(em_tree, block_group->start,  in btrfs_unfreeze_block_group()
4240 		remove_extent_mapping(em_tree, em);  in btrfs_unfreeze_block_group()
4241 		write_unlock(&em_tree->lock);  in btrfs_unfreeze_block_group()