BIT_ZERO
BIT_ZERO(256, &ipi->dmask);
BIT_ZERO(ENA_FLAGS_NUMBER, &(adapter)->flags)
BIT_ZERO(setlen, set);
BIT_ZERO(NL_ATTR_BMASK_SIZE, bm);
BIT_ZERO(keg->uk_ipers, slab_dbg_bits(slab, keg));
BIT_ZERO(256, &bs0);
BIT_ZERO(256, &bsrand);