1 files changed, 4 insertions, 1 deletions

diff --git a/include/asm-s390/pgtable.h b/include/asm-s390/pgtable.h
index 76e8a7904e8a..f8347ce9c5a1 100644
--- a/include/asm-s390/pgtable.h
+++ b/include/asm-s390/pgtable.h
@@ -220,6 +220,8 @@ extern char empty_zero_page[PAGE_SIZE];
 /* Software bits in the page table entry */
 #define _PAGE_SWT       0x001           /* SW pte type bit t */
 #define _PAGE_SWX       0x002           /* SW pte type bit x */
+#define _PAGE_SPECIAL   0x004           /* SW associated with special page */
+#define __HAVE_ARCH_PTE_SPECIAL
 
 /* Six different types of pages. */
 #define _PAGE_TYPE_EMPTY        0x400
@@ -520,7 +522,7 @@ static inline int pte_file(pte_t pte)
 
 static inline int pte_special(pte_t pte)
 {
-        return 0;
+        return (pte_val(pte) & _PAGE_SPECIAL);
 }
 
 #define __HAVE_ARCH_PTE_SAME
@@ -722,6 +724,7 @@ static inline pte_t pte_mkyoung(pte_t pte)
 
 static inline pte_t pte_mkspecial(pte_t pte)
 {
+        pte_val(pte) |= _PAGE_SPECIAL;
         return pte;
 }