pgd_page          629 arch/x86/include/asm/pgtable.h #define pgd_page(pgd)		pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT)
pgd_page           46 include/asm-generic/pgtable-nopud.h #define pgd_page(pgd)				(pud_page((pud_t){ pgd }))