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-rw-r--r--include/asm-i386/pgtable.h8
1 files changed, 5 insertions, 3 deletions
diff --git a/include/asm-i386/pgtable.h b/include/asm-i386/pgtable.h
index d62bdb029efa..628fa7747d0c 100644
--- a/include/asm-i386/pgtable.h
+++ b/include/asm-i386/pgtable.h
@@ -285,13 +285,15 @@ 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) ({ \
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