#define PFNNID_MAP_MAX 512 /* support 512GB */
extern unsigned char pfnnid_map[PFNNID_MAP_MAX];
-#ifndef __LP64__
+#ifndef CONFIG_64BIT
#define pfn_is_io(pfn) ((pfn & (0xf0000000UL >> PAGE_SHIFT)) == (0xf0000000UL >> PAGE_SHIFT))
#else
/* io can be 0xf0f0f0f0f0xxxxxx or 0xfffffffff0000000 */