spte_to_child_sp
child = spte_to_child_sp(ent);
child = spte_to_child_sp(*sptep);
child = spte_to_child_sp(pte);
child = spte_to_child_sp(pte);
spte_to_child_sp(spte)->nx_huge_page_disallowed) {
sp = spte_to_child_sp(root);
return spte_to_child_sp(root);
struct kvm_mmu_page *root = spte_to_child_sp(parent->old_spte);
struct kvm_mmu_page *sp = spte_to_child_sp(new_spte);