x86: unify pmd_bad

Impact: cleanup

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

arch/x86/include/asm/pgtable.h

@@ -514,6 +514,11 @@ static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address)
 	return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address);
 }
 
+static inline int pmd_bad(pmd_t pmd)
+{
+	return (pmd_val(pmd) & ~(PTE_PFN_MASK | _PAGE_USER)) != _KERNPG_TABLE;
+}
+
 #if PAGETABLE_LEVELS > 2
 static inline int pud_present(pud_t pud)
 {

arch/x86/include/asm/pgtable_32.h

@@ -85,8 +85,6 @@ extern void set_pmd_pfn(unsigned long, unsigned long, pgprot_t);
 /* The boot page tables (all created as a single array) */
 extern unsigned long pg0[];
 
-#define pmd_bad(x) ((pmd_val(x) & (PTE_FLAGS_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
-
 #define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))
 
 #ifdef CONFIG_X86_PAE

arch/x86/include/asm/pgtable_64.h

@@ -154,11 +154,6 @@ static inline void native_pgd_clear(pgd_t *pgd)
 
 #ifndef __ASSEMBLY__
 
-static inline int pmd_bad(pmd_t pmd)
-{
-	return (pmd_val(pmd) & ~(PTE_PFN_MASK | _PAGE_USER)) != _KERNPG_TABLE;
-}
-
 #define pages_to_mb(x)	((x) >> (20 - PAGE_SHIFT))   /* FIXME: is this right? */
 
 /*