383 struct scsi_cmnd  struct
414 //	struct scsi_cmnd *bh_next;					//no use  argument
419 	unsigned char lun;				//no use??
421 	unsigned char cmd_len;
423 	unsigned char sc_data_direction;
427 	unsigned char cmnd[MAX_COMMAND_SIZE];
428 	U32 request_bufflen;				/* Actual request size */
431 	void *request_buffer;					/* Actual requested buffer */
438 	U16 use_sg;				/* Number of pieces of scatter-gather */
483 	void (*scsi_done) (struct scsi_cmnd *);  argument
504 typedef struct scsi_cmnd Scsi_Cmnd;  argument