#ifndef BSG_H
  #define BSG_H

  #include <uapi/linux/bsg.h>

  #if defined(CONFIG_BLK_DEV_BSG)
  struct bsg_class_device {

  	struct device *class_dev;

  	struct device *parent;

  	int minor;

  	struct request_queue *queue;

  	struct kref ref;
  	void (*release)(struct device *);

  };

  extern int bsg_register_queue(struct request_queue *q,
  			      struct device *parent, const char *name,
  			      void (*release)(struct device *));

  extern void bsg_unregister_queue(struct request_queue *);

  #else

  static inline int bsg_register_queue(struct request_queue *q,
  				     struct device *parent, const char *name,
  				     void (*release)(struct device *))

  {
  	return 0;
  }

  static inline void bsg_unregister_queue(struct request_queue *q)

  {
  }

  #endif
  
  #endif