HAMMER_ENCODE_UNDO
scan_offset = HAMMER_ENCODE_UNDO(0);
scan_offset = HAMMER_ENCODE_UNDO(0);
blockmap->first_offset = HAMMER_ENCODE_UNDO(0);
blockmap->alloc_offset = HAMMER_ENCODE_UNDO(undo_limit);
if (scan_offset == HAMMER_ENCODE_UNDO(0))
if (scan_offset - sizeof(*tail) < HAMMER_ENCODE_UNDO(0)) {
scan_offset = HAMMER_ENCODE_UNDO(0);
scan_offset = HAMMER_ENCODE_UNDO(0);
undomap->next_offset = HAMMER_ENCODE_UNDO(0);
undomap->next_offset = HAMMER_ENCODE_UNDO(0);
next_offset = HAMMER_ENCODE_UNDO(0);