x86: unify pmd_index

Impact: cleanup

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

arch/x86/include/asm/pgtable.h

@@ -478,6 +478,17 @@ static inline struct page *pmd_page(pmd_t pmd)
 	return pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT);
 }
 
+/*
+ * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD]
+ *
+ * this macro returns the index of the entry in the pmd page which would
+ * control the given virtual address
+ */
+static inline unsigned pmd_index(unsigned long address)
+{
+	return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
+}
+
 #if PAGETABLE_LEVELS > 2
 static inline int pud_present(pud_t pud)
 {

arch/x86/include/asm/pgtable_32.h

@@ -104,15 +104,6 @@ extern unsigned long pg0[];
 
 static inline int pud_large(pud_t pud) { return 0; }
 
-/*
- * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD]
- *
- * this macro returns the index of the entry in the pmd page which would
- * control the given virtual address
- */
-#define pmd_index(address)				\
-	(((address) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
-
 /*
  * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE]
  *

arch/x86/include/asm/pgtable_64.h

@@ -191,7 +191,6 @@ static inline int pud_large(pud_t pte)
 }
 
 /* PMD  - Level 2 access */
-#define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
 #define pmd_offset(dir, address) ((pmd_t *)pud_page_vaddr(*(dir)) + \
 				  pmd_index(address))
 #define pfn_pmd(nr, prot) (__pmd(((nr) << PAGE_SHIFT) | pgprot_val((prot))))