_PAGE_CI
#define _PAGE_IOREMAP (pgprot_val(PAGE_KERNEL) | _PAGE_CI)
#define _PAGE_NO_CACHE _PAGE_CI
| _PAGE_SHARED | _PAGE_DIRTY | _PAGE_EXEC | _PAGE_CI)
pte_val(*pte) |= _PAGE_CI;
pte_val(*pte) &= ~_PAGE_CI;