last_byte_offset
int last_byte_offset = -1;
if (byte_offset != last_byte_offset) {
last_byte_offset = byte_offset;
file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length);
file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length);
file_lock->fl_end = last_byte_offset(locku->lu_offset,