diff --git a/[refs] b/[refs]
index 820336d22c81..088efa9d6c2b 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 62179d47c2b1495bedc942b424e933a4b0f2ed51
+refs/heads/master: f15b9000eb1d09bbaa4b0a6b2089d7e1f64e84b3
diff --git a/trunk/arch/um/include/asm/pgtable.h b/trunk/arch/um/include/asm/pgtable.h
index 6a3f9845743e..294254e13a35 100644
--- a/trunk/arch/um/include/asm/pgtable.h
+++ b/trunk/arch/um/include/asm/pgtable.h
@@ -273,6 +273,12 @@ static inline void set_pte(pte_t *pteptr, pte_t pteval)
 }
 #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
 
+#define __HAVE_ARCH_PTE_SAME
+static inline int pte_same(pte_t pte_a, pte_t pte_b)
+{
+	return !((pte_val(pte_a) ^ pte_val(pte_b)) & ~_PAGE_NEWPAGE);
+}
+
 /*
  * Conversion functions: convert a page and protection to a page entry,
  * and a page entry and page directory to the page they refer to.