diff options
| -rw-r--r-- | include/asm-i386/pgtable.h | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/include/asm-i386/pgtable.h b/include/asm-i386/pgtable.h index c6b8b94..995e8b3 100644 --- a/include/asm-i386/pgtable.h +++ b/include/asm-i386/pgtable.h @@ -296,12 +296,23 @@ do { \ } \ } while (0) -/* - * We don't actually have these, but we want to advertise them so that - * we can encompass the flush here. - */ #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY +static inline int ptep_test_and_clear_dirty(struct vm_area_struct *vma, + unsigned long addr, pte_t *ptep) +{ + if (!pte_dirty(*ptep)) + return 0; + return test_and_clear_bit(_PAGE_BIT_DIRTY, &ptep->pte_low); +} + #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG +static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, + unsigned long addr, pte_t *ptep) +{ + if (!pte_young(*ptep)) + return 0; + return test_and_clear_bit(_PAGE_BIT_ACCESSED, &ptep->pte_low); +} /* * Rules for using ptep_establish: the pte MUST be a user pte, and @@ -318,9 +329,8 @@ do { \ #define ptep_clear_flush_dirty(vma, address, ptep) \ ({ \ int __dirty; \ - __dirty = pte_dirty(*(ptep)); \ + __dirty = ptep_test_and_clear_dirty((vma), (address), (ptep)); \ if (__dirty) { \ - clear_bit(_PAGE_BIT_DIRTY, &(ptep)->pte_low); \ pte_update_defer((vma)->vm_mm, (address), (ptep)); \ flush_tlb_page(vma, address); \ } \ @@ -331,9 +341,8 @@ do { \ #define ptep_clear_flush_young(vma, address, ptep) \ ({ \ int __young; \ - __young = pte_young(*(ptep)); \ + __young = ptep_test_and_clear_young((vma), (address), (ptep)); \ if (__young) { \ - clear_bit(_PAGE_BIT_ACCESSED, &(ptep)->pte_low); \ pte_update_defer((vma)->vm_mm, (address), (ptep)); \ flush_tlb_page(vma, address); \ } \ |
