1275 		struct extent_map_tree *em_tree;  in btrfs_remove_block_group()  local
1277 		em_tree = &fs_info->mapping_tree;  in btrfs_remove_block_group()
1278 		write_lock(&em_tree->lock);  in btrfs_remove_block_group()
1279 		remove_extent_mapping(em_tree, em);  in btrfs_remove_block_group()
1280 		write_unlock(&em_tree->lock);  in btrfs_remove_block_group()
1298 	struct extent_map_tree *em_tree = &fs_info->mapping_tree;  in btrfs_start_trans_remove_block_group()  local
1303 	read_lock(&em_tree->lock);  in btrfs_start_trans_remove_block_group()
1304 	em = lookup_extent_mapping(em_tree, chunk_offset, 1);  in btrfs_start_trans_remove_block_group()
1305 	read_unlock(&em_tree->lock);  in btrfs_start_trans_remove_block_group()
1930 	struct extent_map_tree *em_tree;  in read_bg_from_eb()  local
1941 	em_tree = &fs_info->mapping_tree;  in read_bg_from_eb()
1942 	read_lock(&em_tree->lock);  in read_bg_from_eb()
1943 	em = lookup_extent_mapping(em_tree, key->objectid, key->offset);  in read_bg_from_eb()
1944 	read_unlock(&em_tree->lock);  in read_bg_from_eb()
2372 	struct extent_map_tree *em_tree = &fs_info->mapping_tree;  in fill_dummy_bgs()  local
2376 	for (node = rb_first_cached(&em_tree->map); node; node = rb_next(node)) {  in fill_dummy_bgs()
4423 	struct extent_map_tree *em_tree;  in btrfs_unfreeze_block_group()  local
4433 		em_tree = &fs_info->mapping_tree;  in btrfs_unfreeze_block_group()
4434 		write_lock(&em_tree->lock);  in btrfs_unfreeze_block_group()
4435 		em = lookup_extent_mapping(em_tree, block_group->start,  in btrfs_unfreeze_block_group()
4438 		remove_extent_mapping(em_tree, em);  in btrfs_unfreeze_block_group()
4439 		write_unlock(&em_tree->lock);  in btrfs_unfreeze_block_group()