BFA_TRC_MAX
trcm->tail = (trcm->tail + 1) & (BFA_TRC_MAX - 1);
trcm->head = (trcm->head + 1) & (BFA_TRC_MAX - 1);
#ifndef BFA_TRC_MAX
struct bfa_trc_s trc[BFA_TRC_MAX];
trcm->ntrc = BFA_TRC_MAX;
BFA_TRC_MAX * sizeof(struct bfa_trc_s)))