typedef struct BlockDriverState BlockDriverState;
typedef struct BusClass BusClass;
typedef struct BusState BusState;
typedef struct CharDriverState CharDriverState;
typedef struct CompatProperty CompatProperty;
typedef struct BlockDriverState BlockDriverState;
typedef struct BusClass BusClass;
typedef struct BusState BusState;
typedef struct CharDriverState CharDriverState;
typedef struct CompatProperty CompatProperty;