L2_ISTE_LOG2_ENTRIES
n = MAX(5, lpi_id_bits - L2_ISTE_LOG2_ENTRIES(istsz, l2sz) + 2);
irs->irs_lpi_l2bits = L2_ISTE_LOG2_ENTRIES(istsz, l2sz);
lpi_id_bits > L2_ISTE_LOG2_ENTRIES(istsz, l2sz)) {