PTE_SWP_UFFD_WP
return set_pte_bit(pte, __pgprot(PTE_SWP_UFFD_WP));
return !!(pte_val(pte) & PTE_SWP_UFFD_WP);
return clear_pte_bit(pte, __pgprot(PTE_SWP_UFFD_WP));