PAGE_ATTR          20 arch/x86/kernel/relocate_kernel_32.S #define PAGE_ATTR (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
PAGE_ATTR          20 arch/x86/kernel/relocate_kernel_64.S #define PAGE_ATTR (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)