pbn_from_vio_bio
pbn_from_vio_bio(cursor->vio->vio.bio), page);
physical_block_number_t pbn = pbn_from_vio_bio(vio->bio);
physical_block_number_t __must_check pbn_from_vio_bio(struct bio *bio);
(unsigned long long) pbn_from_vio_bio(vio->bio), thread_id,