CXL_MAGIC          37 include/uapi/misc/cxl.h #define CXL_IOCTL_START_WORK		_IOW(CXL_MAGIC, 0x00, struct cxl_ioctl_start_work)
CXL_MAGIC          38 include/uapi/misc/cxl.h #define CXL_IOCTL_GET_PROCESS_ELEMENT	_IOR(CXL_MAGIC, 0x01, __u32)