#define MEMGETREGIONINFO _IOWR('M', 8, struct region_info_user)
#define MEMREADDATA _IOWR('M', 9, struct mtd_oob_buf)
#define MEMWRITEDATA _IOWR('M', 10, struct mtd_oob_buf)
#define MEMGETREGIONINFO _IOWR('M', 8, struct region_info_user)
#define MEMREADDATA _IOWR('M', 9, struct mtd_oob_buf)
#define MEMWRITEDATA _IOWR('M', 10, struct mtd_oob_buf)