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-rw-r--r--arch/x86/mm/pgtable.c15
-rw-r--r--include/asm-x86/pgtable.h11
2 files changed, 17 insertions, 9 deletions
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index e7cda2057e1d..54bd77a7eee0 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -280,3 +280,18 @@ int ptep_set_access_flags(struct vm_area_struct *vma,
280 280
281 return changed; 281 return changed;
282} 282}
283
284int ptep_test_and_clear_young(struct vm_area_struct *vma,
285 unsigned long addr, pte_t *ptep)
286{
287 int ret = 0;
288
289 if (pte_young(*ptep))
290 ret = test_and_clear_bit(_PAGE_BIT_ACCESSED,
291 &ptep->pte);
292
293 if (ret)
294 pte_update(vma->vm_mm, addr, ptep);
295
296 return ret;
297}
diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h
index feddddc2d97b..676408c98631 100644
--- a/include/asm-x86/pgtable.h
+++ b/include/asm-x86/pgtable.h
@@ -394,15 +394,8 @@ extern int ptep_set_access_flags(struct vm_area_struct *vma,
394 pte_t entry, int dirty); 394 pte_t entry, int dirty);
395 395
396#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG 396#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
397#define ptep_test_and_clear_young(vma, addr, ptep) ({ \ 397extern int ptep_test_and_clear_young(struct vm_area_struct *vma,
398 int __ret = 0; \ 398 unsigned long addr, pte_t *ptep);
399 if (pte_young(*(ptep))) \
400 __ret = test_and_clear_bit(_PAGE_BIT_ACCESSED, \
401 &(ptep)->pte); \
402 if (__ret) \
403 pte_update((vma)->vm_mm, addr, ptep); \
404 __ret; \
405})
406 399
407#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH 400#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
408#define ptep_clear_flush_young(vma, address, ptep) \ 401#define ptep_clear_flush_young(vma, address, ptep) \