void journal_file_reset_location(JournalFile *f);
void journal_file_save_location(JournalFile *f, direction_t direction, Object *o, uint64_t offset);
int journal_file_compare_locations(JournalFile *af, JournalFile *bf);
-int journal_file_next_entry(JournalFile *f, Object *o, uint64_t p, direction_t direction, Object **ret, uint64_t *offset);
+int journal_file_next_entry(JournalFile *f, uint64_t p, direction_t direction, Object **ret, uint64_t *offset);
int journal_file_next_entry_for_data(JournalFile *f, Object *o, uint64_t p, uint64_t data_offset, direction_t direction, Object **ret, uint64_t *offset);