/*
 *
 */

 struct RB_OBJ;

 struct RB_OBJ
 {
  IO_REQ	 Req;
  unsigned int	 scsi_id;
  unsigned long	 blk_num;
  unsigned int	 num_blks;
  unsigned long	 tag;
  unsigned int	 pattern;
  FLAG		 issued;
  long		 req_size;
  long		 data_size;
  struct RB_OBJ *next,
		*prev;
  };

 struct RB_OBJ *rb_first(struct RB_OBJ **);
 struct RB_OBJ *rb_free(struct RB_OBJ **);
 struct RB_OBJ *rb_new(struct RB_OBJ **);
 struct RB_OBJ *rb_next(struct RB_OBJ **);