md/bcache: Combine two prio_io() arguments

Improve uniformity in the kernel of handling of request operation and
flags by passing these as a single argument.

Cc: Coly Li <[e-mail]>
Cc: Mingzhe Zou <[e-mail]>
Signed-off-by: Bart Van Assche <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jens Axboe <[e-mail]>

drivers/md/bcache/super.c

···
 	closure_put(&ca->prio);
 }
 
-static void prio_io(struct cache *ca, uint64_t bucket, int op,
-		    unsigned long op_flags)
+static void prio_io(struct cache *ca, uint64_t bucket, blk_opf_t opf)
 {
 	struct closure *cl = &ca->prio;
 	struct bio *bio = bch_bbio_alloc(ca->set);
···
 
 	bio->bi_end_io	= prio_endio;
 	bio->bi_private = ca;
-	bio_set_op_attrs(bio, op, REQ_SYNC|REQ_META|op_flags);
+	bio->bi_opf = opf | REQ_SYNC | REQ_META;
 	bch_bio_map(bio, ca->disk_buckets);
 
 	closure_bio_submit(ca->set, bio, &ca->prio);
···
 		BUG_ON(bucket == -1);
 
 		mutex_unlock(&ca->set->bucket_lock);
-		prio_io(ca, bucket, REQ_OP_WRITE, 0);
+		prio_io(ca, bucket, REQ_OP_WRITE);
 		mutex_lock(&ca->set->bucket_lock);
 
 		ca->prio_buckets[i] = bucket;
···
 			ca->prio_last_buckets[bucket_nr] = bucket;
 			bucket_nr++;
 
-			prio_io(ca, bucket, REQ_OP_READ, 0);
+			prio_io(ca, bucket, REQ_OP_READ);
 
 			if (p->csum !=
 			    bch_crc64(&p->magic, meta_bucket_bytes(&ca->sb) - 8)) {