xen: properly account for _PAGE_NUMA during xen pte translations

[platform/adaptation/renesas_rcar/renesas_kernel.git] / arch / x86 / include / asm / pgtable.h

diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index bbc8b12..5ad38ad 100644 (file)
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -445,10 +445,20 @@ static inline int pte_same(pte_t a, pte_t b)
        return a.pte == b.pte;
 }
 
+static inline int pteval_present(pteval_t pteval)
+{
+       /*
+        * Yes Linus, _PAGE_PROTNONE == _PAGE_NUMA. Expressing it this
+        * way clearly states that the intent is that protnone and numa
+        * hinting ptes are considered present for the purposes of
+        * pagetable operations like zapping, protection changes, gup etc.
+        */
+       return pteval & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_NUMA);
+}
+
 static inline int pte_present(pte_t a)
 {
-       return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE |
-                              _PAGE_NUMA);
+       return pteval_present(pte_flags(a));
 }
 
 #define pte_accessible pte_accessible