139 struct devstat {  struct
149 	STAILQ_ENTRY(devstat) 	dev_links;  argument
185 STAILQ_HEAD(devstatlist, devstat);  argument
190 struct devstat *devstat_new_entry(const void *dev_name, int unit_number,
196 void devstat_remove_entry(struct devstat *ds);
197 void devstat_start_transaction(struct devstat *ds, const struct bintime *now);
198 void devstat_start_transaction_bio(struct devstat *ds, struct bio *bp);
199 void devstat_start_transaction_bio_t0(struct devstat *ds, struct bio *bp);
200 void devstat_end_transaction(struct devstat *ds, u_int32_t bytes, 
205 void devstat_end_transaction_bio(struct devstat *ds, const struct bio *bp);
206 void devstat_end_transaction_bio_bt(struct devstat *ds, const struct bio *bp,