x86: unify pages_to_mb

Impact: cleanup

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

arch/x86/include/asm/pgtable.h

@@ -519,6 +519,11 @@ static inline int pmd_bad(pmd_t pmd)
 	return (pmd_val(pmd) & ~(PTE_PFN_MASK | _PAGE_USER)) != _KERNPG_TABLE;
 }
 
+static inline unsigned long pages_to_mb(unsigned long npg)
+{
+	return npg >> (20 - PAGE_SHIFT);
+}
+
 #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 pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))
-
 #ifdef CONFIG_X86_PAE
 # include <asm/pgtable-3level.h>
 #else

arch/x86/include/asm/pgtable_64.h

@@ -154,8 +154,6 @@ static inline void native_pgd_clear(pgd_t *pgd)
 
 #ifndef __ASSEMBLY__
 
-#define pages_to_mb(x)	((x) >> (20 - PAGE_SHIFT))   /* FIXME: is this right? */
-
 /*
  * Conversion functions: convert a page and protection to a page entry,
  * and a page entry and page directory to the page they refer to.