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-rw-r--r--include/asm-s390/pgtable.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/include/asm-s390/pgtable.h b/include/asm-s390/pgtable.h
index c7f4f8e..0bdb704 100644
--- a/include/asm-s390/pgtable.h
+++ b/include/asm-s390/pgtable.h
@@ -29,6 +29,7 @@
* the S390 page table tree.
*/
#ifndef __ASSEMBLY__
+#include <linux/sched.h>
#include <linux/mm_types.h>
#include <asm/bitops.h>
#include <asm/bug.h>
@@ -223,6 +224,9 @@ extern char empty_zero_page[PAGE_SIZE];
#define _PAGE_SPECIAL 0x004 /* SW associated with special page */
#define __HAVE_ARCH_PTE_SPECIAL
+/* Set of bits not changed in pte_modify */
+#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_SPECIAL)
+
/* Six different types of pages. */
#define _PAGE_TYPE_EMPTY 0x400
#define _PAGE_TYPE_NONE 0x401
@@ -681,7 +685,7 @@ static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *pt
*/
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
- pte_val(pte) &= PAGE_MASK;
+ pte_val(pte) &= _PAGE_CHG_MASK;
pte_val(pte) |= pgprot_val(newprot);
return pte;
}
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