md/bcache: Combine two uuid_io() arguments

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

Cc: Coly Li <colyli@suse.de>
Cc: Mingzhe Zou <mingzhe.zou@easystack.cn>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20220714180729.1065367-33-bvanassche@acm.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/md/bcache/super.c

@@ -414,8 +414,8 @@ static void uuid_io_unlock(struct closure *cl)
 	up(&c->uuid_write_mutex);
 }
 
-static void uuid_io(struct cache_set *c, int op, unsigned long op_flags,
-		    struct bkey *k, struct closure *parent)
+static void uuid_io(struct cache_set *c, blk_opf_t opf, struct bkey *k,
+		    struct closure *parent)
 {
 	struct closure *cl = &c->uuid_write;
 	struct uuid_entry *u;
@@ -429,22 +429,22 @@ static void uuid_io(struct cache_set *c, int op, unsigned long op_flags,
 	for (i = 0; i < KEY_PTRS(k); i++) {
 		struct bio *bio = bch_bbio_alloc(c);
 
-		bio->bi_opf = REQ_SYNC | REQ_META | op_flags;
+		bio->bi_opf = opf | REQ_SYNC | REQ_META;
 		bio->bi_iter.bi_size = KEY_SIZE(k) << 9;
 
 		bio->bi_end_io	= uuid_endio;
 		bio->bi_private = cl;
-		bio_set_op_attrs(bio, op, REQ_SYNC|REQ_META|op_flags);
 		bch_bio_map(bio, c->uuids);
 
 		bch_submit_bbio(bio, c, k, i);
 
-		if (op != REQ_OP_WRITE)
+		if ((opf & REQ_OP_MASK) != REQ_OP_WRITE)
 			break;
 	}
 
 	bch_extent_to_text(buf, sizeof(buf), k);
-	pr_debug("%s UUIDs at %s\n", op == REQ_OP_WRITE ? "wrote" : "read", buf);
+	pr_debug("%s UUIDs at %s\n", (opf & REQ_OP_MASK) == REQ_OP_WRITE ?
+		 "wrote" : "read", buf);
 
 	for (u = c->uuids; u < c->uuids + c->nr_uuids; u++)
 		if (!bch_is_zero(u->uuid, 16))
@@ -463,7 +463,7 @@ static char *uuid_read(struct cache_set *c, struct jset *j, struct closure *cl)
 		return "bad uuid pointer";
 
 	bkey_copy(&c->uuid_bucket, k);
-	uuid_io(c, REQ_OP_READ, 0, k, cl);
+	uuid_io(c, REQ_OP_READ, k, cl);
 
 	if (j->version < BCACHE_JSET_VERSION_UUIDv1) {
 		struct uuid_entry_v0	*u0 = (void *) c->uuids;
@@ -511,7 +511,7 @@ static int __uuid_write(struct cache_set *c)
 
 	size =  meta_bucket_pages(&ca->sb) * PAGE_SECTORS;
 	SET_KEY_SIZE(&k.key, size);
-	uuid_io(c, REQ_OP_WRITE, 0, &k.key, &cl);
+	uuid_io(c, REQ_OP_WRITE, &k.key, &cl);
 	closure_sync(&cl);
 
 	/* Only one bucket used for uuid write */