x86: unify pmd_page

Impact: cleanup

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

arch/x86/include/asm/pgtable.h

@@ -473,6 +473,11 @@ static inline unsigned long pmd_page_vaddr(pmd_t pmd)
 	return (unsigned long)__va(pmd_val(pmd) & PTE_PFN_MASK);
 }
 
+static inline struct page *pmd_page(pmd_t pmd)
+{
+	return pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT);
+}
+
 #if PAGETABLE_LEVELS > 2
 static inline int pud_present(pud_t pud)
 {

arch/x86/include/asm/pgtable_32.h

@@ -124,8 +124,6 @@ static inline int pud_large(pud_t pud) { return 0; }
 #define pte_offset_kernel(dir, address)				\
 	((pte_t *)pmd_page_vaddr(*(dir)) +  pte_index((address)))
 
-#define pmd_page(pmd) (pfn_to_page(pmd_val((pmd)) >> PAGE_SHIFT))
-
 #if defined(CONFIG_HIGHPTE)
 #define pte_offset_map(dir, address)					\
 	((pte_t *)kmap_atomic_pte(pmd_page(*(dir)), KM_PTE0) +		\

arch/x86/include/asm/pgtable_64.h

@@ -191,8 +191,6 @@ static inline int pud_large(pud_t pte)
 }
 
 /* PMD  - Level 2 access */
-#define pmd_page(pmd)		(pfn_to_page(pmd_val((pmd)) >> PAGE_SHIFT))
-
 #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))