x86: unify pgtable accessors which use, #2

based on:

 Subject: x86: unify pgtable accessors which use supported_pte_mask
 From: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

include/asm-x86/pgtable.h

@@ -155,6 +155,21 @@ static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
 		      pgprot_val(pgprot)) & __supported_pte_mask);
 }
 
+static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
+{
+	pteval_t val = pte_val(pte);
+
+	/*
+	 * Chop off the NX bit (if present), and add the NX portion of
+	 * the newprot (if present):
+	 */
+	val &= _PAGE_CHG_MASK & ~_PAGE_NX;
+	val |= pgprot_val(newprot) & __supported_pte_mask;
+
+	return __pte(val);
+}
+
+
 #endif	/* __ASSEMBLY__ */
 
 #ifdef CONFIG_X86_32

include/asm-x86/pgtable_32.h

@@ -235,22 +235,6 @@ static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count)
 
 #define mk_pte(page, pgprot)	pfn_pte(page_to_pfn(page), (pgprot))
 
-static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
-{
-	pte.pte_low &= _PAGE_CHG_MASK;
-	pte.pte_low |= pgprot_val(newprot);
-#ifdef CONFIG_X86_PAE
-	/*
-	 * Chop off the NX bit (if present), and add the NX portion of
-	 * the newprot (if present):
-	 */
-	pte.pte_high &= ~(1 << (_PAGE_BIT_NX - 32));
-	pte.pte_high |= (pgprot_val(newprot) >> 32) & \
-					(__supported_pte_mask >> 32);
-#endif
-	return pte;
-}
-
 /*
  * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD]
  *