BITS_PER_TYPE
u32 npkts = BIT_GAP(BITS_PER_TYPE(u32), end->pkt_ctr, start->pkt_ctr);
u32 nbytes = BIT_GAP(BITS_PER_TYPE(u32), end->byte_ctr,
nevents = BIT_GAP(BITS_PER_TYPE(u16),
for (bit = 0; bit < BITS_PER_TYPE(flags); bit++) {