libnvdimm, blk: use ->queuedata for driver private data

Save a pointer chase by storing the driver private data in the
request_queue rather than the gendisk.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/nvdimm/blk.c b/drivers/nvdimm/blk.c
index 27ff32a..c8635b3 100644 (file)
--- a/drivers/nvdimm/blk.c
+++ b/drivers/nvdimm/blk.c
@@ -159,8 +159,6 @@ static int nd_blk_do_bvec(struct nd_blk_device *blk_dev,
 
 static blk_qc_t nd_blk_make_request(struct request_queue *q, struct bio *bio)
 {
-       struct block_device *bdev = bio->bi_bdev;
-       struct gendisk *disk = bdev->bd_disk;
        struct bio_integrity_payload *bip;
        struct nd_blk_device *blk_dev;
        struct bvec_iter iter;
@@ -181,7 +179,7 @@ static blk_qc_t nd_blk_make_request(struct request_queue *q, struct bio *bio)
        }
 
        bip = bio_integrity(bio);
-       blk_dev = disk->private_data;
+       blk_dev = q->queuedata;
        rw = bio_data_dir(bio);
        do_acct = nd_iostat_start(bio, &start);
        bio_for_each_segment(bvec, bio, iter) {
@@ -268,6 +266,7 @@ static int nd_blk_attach_disk(struct device *dev,
        blk_queue_bounce_limit(q, BLK_BOUNCE_ANY);
        blk_queue_logical_block_size(q, blk_dev->sector_size);
        queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
+       q->queuedata = blk_dev;
 
        disk = alloc_disk(0);
        if (!disk)
@@ -280,7 +279,6 @@ static int nd_blk_attach_disk(struct device *dev,
        disk->driverfs_dev      = &ndns->dev;
        disk->first_minor       = 0;
        disk->fops              = &nd_blk_fops;
-       disk->private_data      = blk_dev;
        disk->queue             = q;
        disk->flags             = GENHD_FL_EXT_DEVT;
        nvdimm_namespace_disk_name(ndns, disk->disk_name);