extern int __must_check read_iolog_get(struct thread_data *, struct io_u *);
extern void log_io_u(const struct thread_data *, const struct io_u *);
extern void log_file(struct thread_data *, struct fio_file *, enum file_log_act);
extern int __must_check read_iolog_get(struct thread_data *, struct io_u *);
extern void log_io_u(const struct thread_data *, const struct io_u *);
extern void log_file(struct thread_data *, struct fio_file *, enum file_log_act);
extern void log_io_piece(struct thread_data *, struct io_u *);
extern void unlog_io_piece(struct thread_data *, struct io_u *);
extern void log_io_piece(struct thread_data *, struct io_u *);
extern void unlog_io_piece(struct thread_data *, struct io_u *);
extern void queue_io_piece(struct thread_data *, struct io_piece *);
extern void prune_io_piece_log(struct thread_data *);
extern void write_iolog_close(struct thread_data *);
extern int iolog_compress_init(struct thread_data *, struct sk_out *);
extern void iolog_compress_exit(struct thread_data *);
extern size_t log_chunk_sizes(struct io_log *);
extern void queue_io_piece(struct thread_data *, struct io_piece *);
extern void prune_io_piece_log(struct thread_data *);
extern void write_iolog_close(struct thread_data *);
extern int iolog_compress_init(struct thread_data *, struct sk_out *);
extern void iolog_compress_exit(struct thread_data *);
extern size_t log_chunk_sizes(struct io_log *);
extern void setup_log(struct io_log **, struct log_params *, const char *);
extern void flush_log(struct io_log *, bool);
extern void flush_samples(FILE *, void *, uint64_t);
extern void setup_log(struct io_log **, struct log_params *, const char *);
extern void flush_log(struct io_log *, bool);
extern void flush_samples(FILE *, void *, uint64_t);
-extern unsigned long hist_sum(int, int, unsigned int *, unsigned int *);
+extern uint64_t hist_sum(int, int, uint64_t *, uint64_t *);
extern void free_log(struct io_log *);
extern void fio_writeout_logs(bool);
extern void td_writeout_logs(struct thread_data *, bool);
extern void free_log(struct io_log *);
extern void fio_writeout_logs(bool);
extern void td_writeout_logs(struct thread_data *, bool);