NB_LEFT_IN_SECTOR
xfer = MIN(NB_LEFT_IN_SECTOR(*addr), nb);
if (NB_LEFT_IN_SECTOR(*addr) == 0) {
return (NB_LEFT_IN_SECTOR(a));
i = MIN(NB_LEFT_IN_SECTOR(addr), nb);
if (NB_LEFT_IN_SECTOR(addr) == 0)
NB_LEFT_IN_SECTOR(*addr) +
return (NB_LEFT_IN_SECTOR(lof));
nb_in_sec = NB_LEFT_IN_SECTOR(bp->b_bcount);
nb_sec = NB_LEFT_IN_SECTOR(dst_lof);