__pgd_to_phys
return __pgd_to_phys(pgd);
#define pgd_page(pgd) pfn_to_page(__phys_to_pfn(__pgd_to_phys(pgd)))
pud_t *pudp = (pud_t *)__phys_to_kimg(__pgd_to_phys(pgd));
pud_t *pudp = (pud_t *)__phys_to_kimg(__pgd_to_phys(pgd));