diskerr
diskerr(bio, dev,
diskerr(bio, sc->ad_dev_t, code, 0, 0);
diskerr(bio, sc->ld_disk.d_cdev, "hard error", -1, 1);
diskerr(&bp->b_bio1, wdev,
diskerr(&bp->b_bio1, dev,
void diskerr (struct bio *bio, cdev_t dev, const char *what, int pri,