x86: unify pud_none

Impact: cleanup

Unify and demacro pud_none.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

arch/x86/include/asm/pgtable-3level.h

@@ -18,11 +18,6 @@
 	printk("%s:%d: bad pgd %p(%016Lx).\n",				\
 	       __FILE__, __LINE__, &(e), pgd_val(e))
 
-static inline int pud_none(pud_t pud)
-{
-	return pud_val(pud) == 0;
-}
-
 /* Rules for using set_pte: the pte being assigned *must* be
  * either not present or in a state where the hardware will
  * not attempt to update the pte.  In places where this is

arch/x86/include/asm/pgtable.h

@@ -525,6 +525,11 @@ static inline unsigned long pages_to_mb(unsigned long npg)
 }
 
 #if PAGETABLE_LEVELS > 2
+static inline int pud_none(pud_t pud)
+{
+	return pud_val(pud) == 0;
+}
+
 static inline int pud_present(pud_t pud)
 {
 	return pud_val(pud) & _PAGE_PRESENT;

arch/x86/include/asm/pgtable_64.h

@@ -68,7 +68,6 @@ extern void paging_init(void);
 	       __FILE__, __LINE__, &(e), pgd_val(e))
 
 #define pgd_none(x)	(!pgd_val(x))
-#define pud_none(x)	(!pud_val(x))
 
 struct mm_struct;