nvdimm/blk: 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/20200508161517.252308-14-hch@lst.deSigned-off-by: Dan Williams <dan.j.williams@intel.com>

drivers/nvdimm/blk.c

@@ -165,7 +165,7 @@ static int nsblk_do_bvec(struct nd_namespace_blk *nsblk,
 static blk_qc_t nd_blk_make_request(struct request_queue *q, struct bio *bio)
 {
 	struct bio_integrity_payload *bip;
-	struct nd_namespace_blk *nsblk;
+	struct nd_namespace_blk *nsblk = bio->bi_disk->private_data;
 	struct bvec_iter iter;
 	unsigned long start;
 	struct bio_vec bvec;
@@ -176,7 +176,6 @@ static blk_qc_t nd_blk_make_request(struct request_queue *q, struct bio *bio)
 		return BLK_QC_T_NONE;
 
 	bip = bio_integrity(bio);
-	nsblk = q->queuedata;
 	rw = bio_data_dir(bio);
 	do_acct = nd_iostat_start(bio, &start);
 	bio_for_each_segment(bvec, bio, iter) {
@@ -258,7 +257,6 @@ static int nsblk_attach_disk(struct nd_namespace_blk *nsblk)
 	blk_queue_max_hw_sectors(q, UINT_MAX);
 	blk_queue_logical_block_size(q, nsblk_sector_size(nsblk));
 	blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
-	q->queuedata = nsblk;
 
 	disk = alloc_disk(0);
 	if (!disk)
@@ -268,6 +266,7 @@ static int nsblk_attach_disk(struct nd_namespace_blk *nsblk)
 	disk->fops		= &nd_blk_fops;
 	disk->queue		= q;
 	disk->flags		= GENHD_FL_EXT_DEVT;
+	disk->private_data	= nsblk;
 	nvdimm_namespace_disk_name(&nsblk->common, disk->disk_name);
 
 	if (devm_add_action_or_reset(dev, nd_blk_release_disk, disk))