diff options
Diffstat (limited to 'include/asm-x86/pgtable.h')
| -rw-r--r-- | include/asm-x86/pgtable.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h index b29a122..6452286 100644 --- a/include/asm-x86/pgtable.h +++ b/include/asm-x86/pgtable.h @@ -155,6 +155,21 @@ static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) pgprot_val(pgprot)) & __supported_pte_mask); } +static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) +{ + pteval_t val = pte_val(pte); + + /* + * Chop off the NX bit (if present), and add the NX portion of + * the newprot (if present): + */ + val &= _PAGE_CHG_MASK & ~_PAGE_NX; + val |= pgprot_val(newprot) & __supported_pte_mask; + + return __pte(val); +} + + #endif /* __ASSEMBLY__ */ #ifdef CONFIG_X86_32 |