BRTT_SIZE
const int brtt_tab[BRTT_SIZE] = {
fv->fv_p2ftab = malloc(sizeof(int) * BRTT_SIZE, M_DEVBUF, M_WAITOK);
for (i = 1; i < BRTT_SIZE; i++) {
f = fv->fv_p2ftab[BRTT_SIZE-1];