2131 	u64 root_id;  member
2165 	if (b1->root_id < b2->root_id)  in backref_comp()
2167 	else if (b1->root_id > b2->root_id)  in backref_comp()
2221 static noinline int record_one_backref(u64 inum, u64 offset, u64 root_id,  in record_one_backref()  argument
2239 	if (BTRFS_I(inode)->root->root_key.objectid == root_id &&  in record_one_backref()
2243 	key.objectid = root_id;  in record_one_backref()
2254 			 inum, offset, root_id);  in record_one_backref()
2327 	backref->root_id = root_id;  in record_one_backref()
2420 	if (prev && prev->root_id == backref->root_id &&  in relink_extent_backref()
2426 	key.objectid = backref->root_id;  in relink_extent_backref()
2577 			backref->root_id, backref->inum,  in relink_extent_backref()