nvdimm/btt: stop using ->queuedata

In preparation for removing queuedata as an argument to
make_request_fn() drop the dependency ->queuedata.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20200508161517.252308-15-hch@lst.deSigned-off-by: Dan Williams <dan.j.williams@intel.com>

drivers/nvdimm/btt.c

@@ -1442,7 +1442,7 @@ static int btt_do_bvec(struct btt *btt, struct bio_integrity_payload *bip,
 static blk_qc_t btt_make_request(struct request_queue *q, struct bio *bio)
 {
 	struct bio_integrity_payload *bip = bio_integrity(bio);
-	struct btt *btt = q->queuedata;
+	struct btt *btt = bio->bi_disk->private_data;
 	struct bvec_iter iter;
 	unsigned long start;
 	struct bio_vec bvec;
@@ -1543,7 +1543,6 @@ static int btt_blk_init(struct btt *btt)
 	blk_queue_logical_block_size(btt->btt_queue, btt->sector_size);
 	blk_queue_max_hw_sectors(btt->btt_queue, UINT_MAX);
 	blk_queue_flag_set(QUEUE_FLAG_NONROT, btt->btt_queue);
-	btt->btt_queue->queuedata = btt;
 
 	if (btt_meta_size(btt)) {
 		int rc = nd_integrity_init(btt->btt_disk, btt_meta_size(btt));