1 files changed, 8 insertions, 4 deletions

diff --git a/include/asm-powerpc/pgtable-ppc64.h b/include/asm-powerpc/pgtable-ppc64.h
index d61178dea670..4ea99922a75c 100644
--- a/include/asm-powerpc/pgtable-ppc64.h
+++ b/include/asm-powerpc/pgtable-ppc64.h
@@ -408,10 +408,14 @@ static inline void __ptep_set_access_flags(pte_t *ptep, pte_t entry, int dirty)
         :"cc");
 }
 #define  ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \
-        do {                                                               \
-                __ptep_set_access_flags(__ptep, __entry, __dirty);         \
-                flush_tlb_page_nohash(__vma, __address);                   \
-        } while(0)
+({                                                                         \
+        int __changed = !pte_same(*(__ptep), __entry);                     \
+        if (__changed) {                                                   \
+                __ptep_set_access_flags(__ptep, __entry, __dirty);         \
+                flush_tlb_page_nohash(__vma, __address);                   \
+        }                                                                  \
+        __changed;                                                         \
+})
 
 /*
  * Macro to mark a page protection value as "uncacheable".