x86: unify pgd_bad

Impact: cleanup

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

arch/x86/include/asm/pgtable.h

@@ -574,6 +574,11 @@ static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address)
 {
 	return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address);
 }
+
+static inline int pgd_bad(pgd_t pgd)
+{
+	return (pgd_val(pgd) & ~(PTE_PFN_MASK | _PAGE_USER)) != _KERNPG_TABLE;
+}
 #endif	/* PAGETABLE_LEVELS > 3 */
 
 #endif	/* __ASSEMBLY__ */

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 pgd_bad(pgd_t pgd)
-{
-	return (pgd_val(pgd) & ~(PTE_PFN_MASK | _PAGE_USER)) != _KERNPG_TABLE;
-}
-
 static inline int pud_bad(pud_t pud)
 {
 	return (pud_val(pud) & ~(PTE_PFN_MASK | _PAGE_USER)) != _KERNPG_TABLE;