[PATCH 3 of 4] x86: clean up pte_modify

[Jeremy Fitzhardinge <jeremy@goop.org>]

pte_modify() got mushed in an apparent mismerge.  Fix it up.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>

---
 include/asm-x86/pgtable.h |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h
--- a/include/asm-x86/pgtable.h
+++ b/include/asm-x86/pgtable.h
@@ -176,14 +176,11 @@ static inline pte_t pte_modify(pte_t pte
 {
 	pteval_t val = pte_val(pte);
 
-	val &= _PAGE_CHG_MASK;
-	val |= pgprot_val(newprot);
-
 	/*
 	 * Chop off the NX bit (if present), and add the NX portion of
 	 * the newprot (if present):
 	 */
-	val &= ~_PAGE_NX;
+	val &= _PAGE_CHG_MASK & ~_PAGE_NX;
 	val |= pgprot_val(newprot) & __supported_pte_mask;
 
 	return __pte(val);