extern void io_u_fill_buffer(struct thread_data *td, struct io_u *, unsigned int, unsigned int);
void io_u_mark_complete(struct thread_data *, unsigned int);
void io_u_mark_submit(struct thread_data *, unsigned int);
-int queue_full(const struct thread_data *);
+bool queue_full(const struct thread_data *);
int do_io_u_sync(const struct thread_data *, struct io_u *);
int do_io_u_trim(const struct thread_data *, struct io_u *);