1 files changed, 6 insertions, 3 deletions

diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h
index 3ca03f902e05..70fcb2adbb71 100644
--- a/include/asm-x86/pgtable.h
+++ b/include/asm-x86/pgtable.h
@@ -18,6 +18,7 @@
 #define _PAGE_BIT_UNUSED2       10
 #define _PAGE_BIT_UNUSED3       11
 #define _PAGE_BIT_PAT_LARGE     12      /* On 2MB or 1GB pages */
+#define _PAGE_BIT_SPECIAL       _PAGE_BIT_UNUSED1
 #define _PAGE_BIT_NX           63       /* No execute: only valid after cpuid check */
 
 #define _PAGE_PRESENT   (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT)
@@ -34,6 +35,8 @@
 #define _PAGE_UNUSED3   (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED3)
 #define _PAGE_PAT       (_AT(pteval_t, 1) << _PAGE_BIT_PAT)
 #define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
+#define _PAGE_SPECIAL   (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL)
+#define __HAVE_ARCH_PTE_SPECIAL
 
 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
 #define _PAGE_NX        (_AT(pteval_t, 1) << _PAGE_BIT_NX)
@@ -54,7 +57,7 @@
 
 /* Set of bits not changed in pte_modify */
 #define _PAGE_CHG_MASK  (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT |         \
-                         _PAGE_ACCESSED | _PAGE_DIRTY)
+                         _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY)
 
 #define _PAGE_CACHE_MASK        (_PAGE_PCD | _PAGE_PWT)
 #define _PAGE_CACHE_WB          (0)
@@ -180,7 +183,7 @@ static inline int pte_exec(pte_t pte)
 
 static inline int pte_special(pte_t pte)
 {
-        return 0;
+        return pte_val(pte) & _PAGE_SPECIAL;
 }
 
 static inline int pmd_large(pmd_t pte)
@@ -246,7 +249,7 @@ static inline pte_t pte_clrglobal(pte_t pte)
 
 static inline pte_t pte_mkspecial(pte_t pte)
 {
-        return pte;
+        return __pte(pte_val(pte) | _PAGE_SPECIAL);
 }
 
 extern pteval_t __supported_pte_mask;