1001 	struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;  in check_defrag_in_cache()  local
1004 	read_lock(&em_tree->lock);  in check_defrag_in_cache()
1005 	em = lookup_extent_mapping(em_tree, offset, PAGE_SIZE);  in check_defrag_in_cache()
1006 	read_unlock(&em_tree->lock);  in check_defrag_in_cache()
1092 	struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;  in defrag_lookup_extent()  local
1101 	read_lock(&em_tree->lock);  in defrag_lookup_extent()
1102 	em = lookup_extent_mapping(em_tree, start, len);  in defrag_lookup_extent()
1103 	read_unlock(&em_tree->lock);  in defrag_lookup_extent()
3689 	struct extent_map_tree *em_tree = &inode->extent_tree;  in clone_update_extent_map()  local
3723 		write_lock(&em_tree->lock);  in clone_update_extent_map()
3724 		ret = add_extent_mapping(em_tree, em, 1);  in clone_update_extent_map()
3725 		write_unlock(&em_tree->lock);  in clone_update_extent_map()