diff options
Diffstat (limited to 'include/asm-i386/pgtable.h')
| -rw-r--r-- | include/asm-i386/pgtable.h | 34 |
1 files changed, 19 insertions, 15 deletions
diff --git a/include/asm-i386/pgtable.h b/include/asm-i386/pgtable.h index 2394589786ba..628fa7747d0c 100644 --- a/include/asm-i386/pgtable.h +++ b/include/asm-i386/pgtable.h @@ -285,32 +285,36 @@ static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) */ #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS #define ptep_set_access_flags(vma, address, ptep, entry, dirty) \ -do { \ - if (dirty) { \ +({ \ + int __changed = !pte_same(*(ptep), entry); \ + if (__changed && dirty) { \ (ptep)->pte_low = (entry).pte_low; \ pte_update_defer((vma)->vm_mm, (address), (ptep)); \ flush_tlb_page(vma, address); \ } \ -} while (0) + __changed; \ +}) #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY #define ptep_test_and_clear_dirty(vma, addr, ptep) ({ \ - int ret = 0; \ - if (pte_dirty(*ptep)) \ - ret = test_and_clear_bit(_PAGE_BIT_DIRTY, &ptep->pte_low); \ - if (ret) \ - pte_update_defer(vma->vm_mm, addr, ptep); \ - ret; \ + int __ret = 0; \ + if (pte_dirty(*(ptep))) \ + __ret = test_and_clear_bit(_PAGE_BIT_DIRTY, \ + &(ptep)->pte_low); \ + if (__ret) \ + pte_update((vma)->vm_mm, addr, ptep); \ + __ret; \ }) #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG #define ptep_test_and_clear_young(vma, addr, ptep) ({ \ - int ret = 0; \ - if (pte_young(*ptep)) \ - ret = test_and_clear_bit(_PAGE_BIT_ACCESSED, &ptep->pte_low); \ - if (ret) \ - pte_update_defer(vma->vm_mm, addr, ptep); \ - ret; \ + int __ret = 0; \ + if (pte_young(*(ptep))) \ + __ret = test_and_clear_bit(_PAGE_BIT_ACCESSED, \ + &(ptep)->pte_low); \ + if (__ret) \ + pte_update((vma)->vm_mm, addr, ptep); \ + __ret; \ }) /* |