Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/hch/hfsplus

[pandora-kernel.git] / arch / s390 / include / asm / pgtable.h

diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index f79e7bb..02ace34 100644 (file)
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -772,6 +772,34 @@ static inline pte_t pte_mkspecial(pte_t pte)
        return pte;
 }
 
+#ifdef CONFIG_HUGETLB_PAGE
+static inline pte_t pte_mkhuge(pte_t pte)
+{
+       /*
+        * PROT_NONE needs to be remapped from the pte type to the ste type.
+        * The HW invalid bit is also different for pte and ste. The pte
+        * invalid bit happens to be the same as the ste _SEGMENT_ENTRY_LARGE
+        * bit, so we don't have to clear it.
+        */
+       if (pte_val(pte) & _PAGE_INVALID) {
+               if (pte_val(pte) & _PAGE_SWT)
+                       pte_val(pte) |= _HPAGE_TYPE_NONE;
+               pte_val(pte) |= _SEGMENT_ENTRY_INV;
+       }
+       /*
+        * Clear SW pte bits SWT and SWX, there are no SW bits in a segment
+        * table entry.
+        */
+       pte_val(pte) &= ~(_PAGE_SWT | _PAGE_SWX);
+       /*
+        * Also set the change-override bit because we don't need dirty bit
+        * tracking for hugetlbfs pages.
+        */
+       pte_val(pte) |= (_SEGMENT_ENTRY_LARGE | _SEGMENT_ENTRY_CO);
+       return pte;
+}
+#endif
+
 #ifdef CONFIG_PGSTE
 /*
  * Get (and clear) the user dirty bit for a PTE.
@@ -1066,9 +1094,7 @@ static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
 #define pte_offset(pmd, addr) ((pte_t *) pmd_deref(*(pmd)) + pte_index(addr))
 #define pte_offset_kernel(pmd, address) pte_offset(pmd,address)
 #define pte_offset_map(pmd, address) pte_offset_kernel(pmd, address)
-#define pte_offset_map_nested(pmd, address) pte_offset_kernel(pmd, address)
 #define pte_unmap(pte) do { } while (0)
-#define pte_unmap_nested(pte) do { } while (0)
 
 /*
  * 31 bit swap entry format: