makedev
#define makedev(x,y) ((dev_t)(((x) << 8) | (y))) /* create dev_t */
#define makedev(x, y) ((dev_t)(((x)<<8) | (y)))
#undef makedev
#define makedev(maj, min) (__makedev(NEWDEV, maj, min))
#define makedev(x, y) (unsigned short)(((x) << O_BITSMINOR) | ((y) & O_MAXMIN))