pmap_pte_testset
opte = pmap_pte_testset(pte, npte); /* zap! */
opte = pmap_pte_testset(pte, 0); /* zap! */
opde = pmap_pte_testset(&pdes[level - 1][index], 0);
opte = pmap_pte_testset(pte, 0);
opte = pmap_pte_testset(ptep, npte);
pmap_pte_testset(&ptes[pl1_i(va)], 0);
(void)pmap_pte_testset(tree[level - 1], 0);
opte = pmap_pte_testset(pte, 0);
opte = pmap_pte_testset(ptep, npte);
opte = pmap_pte_testset(pte, npte); /* zap! */