+#define major(x) \
+ ((unsigned)( (((x)>>32) & 0xfffff000) | (((x)>>8) & 0x00000fff) ))
+#define minor(x) \
+ ((unsigned)( (((x)>>12) & 0xffffff00) | ((x) & 0x000000ff) ))
+
+#define makedev(x,y) ( \
+ (((x)&0xfffff000ULL) << 32) | \
+ (((x)&0x00000fffULL) << 8) | \
+ (((y)&0xffffff00ULL) << 12) | \
+ (((y)&0x000000ffULL)) )