typedef unsigned int	__kernel_dev_t;typedef __kernel_dev_t		dev_t;struct ustat {};typedef unsigned int kdev_t;static inline kdev_t to_kdev_t(int dev){	int major, minor;	major = (dev >> 8);	minor = (dev & 0xff);	return ((( major ) << 22 ) | (  minor )) ;}struct super_block {};struct super_block * get_super (kdev_t dev);int sys_ustat(dev_t dev, struct ustat * ubuf){        struct super_block *s;        s = get_super(to_kdev_t(dev));}