x86: unify pud_index

Impact: cleanup

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

arch/x86/include/asm/pgtable.h

@@ -500,6 +500,12 @@ static inline struct page *pgd_page(pgd_t pgd)
 {
 	return pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT);
 }
+
+/* to find an entry in a page-table-directory. */
+static inline unsigned pud_index(unsigned long address)
+{
+	return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1);
+}
 #endif	/* PAGETABLE_LEVELS > 3 */
 
 #endif	/* __ASSEMBLY__ */

arch/x86/include/asm/pgtable_64.h

@@ -183,8 +183,6 @@ static inline int pgd_large(pgd_t pgd) { return 0; }
 #define mk_kernel_pgd(address) __pgd((address) | _KERNPG_TABLE)
 
 /* PUD - Level3 access */
-/* to find an entry in a page-table-directory. */
-#define pud_index(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD - 1))
 #define pud_offset(pgd, address)					\
 	((pud_t *)pgd_page_vaddr(*(pgd)) + pud_index((address)))