extern int write_ubd_fs(int fd, char *buffer, int len);
extern int start_io_thread(unsigned long sp, int *fds_out);
extern void do_io(struct io_thread_req *req);
extern int write_ubd_fs(int fd, char *buffer, int len);
extern int start_io_thread(unsigned long sp, int *fds_out);
extern void do_io(struct io_thread_req *req);