md, dm, scsi, nvme, libnvdimm: drop blk_integrity_unregister() at shutdown

Now that the integrity profile is statically allocated there is no work
to do when shutting down an integrity enabled block device.

Cc: Matthew Wilcox <willy@linux.intel.com>
Cc: Mike Snitzer <snitzer@redhat.com>
Cc: James Bottomley <JBottomley@Odin.com>
Acked-by: NeilBrown <neilb@suse.com>
Acked-by: Keith Busch <keith.busch@intel.com>
Acked-by: Vishal Verma <vishal.l.verma@intel.com>
Tested-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

drivers/md/dm.c

@@ -2233,8 +2233,6 @@ static void cleanup_mapped_device(struct mapped_device *md)
 		spin_lock(&_minor_lock);
 		md->disk->private_data = NULL;
 		spin_unlock(&_minor_lock);
-		if (blk_get_integrity(md->disk))
-			blk_integrity_unregister(md->disk);
 		del_gendisk(md->disk);
 		put_disk(md->disk);
 	}

drivers/md/md.c

@@ -5539,7 +5539,6 @@ static int do_md_stop(struct mddev *mddev, int mode,
 		if (mddev->hold_active == UNTIL_STOP)
 			mddev->hold_active = 0;
 	}
-	blk_integrity_unregister(disk);
 	md_new_event(mddev);
 	sysfs_notify_dirent_safe(mddev->sysfs_state);
 	return 0;

drivers/nvdimm/btt.c

@@ -1279,7 +1279,6 @@ static int btt_blk_init(struct btt *btt)
 
 static void btt_blk_cleanup(struct btt *btt)
 {
-	blk_integrity_unregister(btt->btt_disk);
 	del_gendisk(btt->btt_disk);
 	put_disk(btt->btt_disk);
 	blk_cleanup_queue(btt->btt_queue);

drivers/nvme/host/pci.c

@@ -2407,11 +2407,8 @@ static void nvme_ns_remove(struct nvme_ns *ns)
 
 	if (kill)
 		blk_set_queue_dying(ns->queue);
-	if (ns->disk->flags & GENHD_FL_UP) {
-		if (blk_get_integrity(ns->disk))
-			blk_integrity_unregister(ns->disk);
+	if (ns->disk->flags & GENHD_FL_UP)
 		del_gendisk(ns->disk);
-	}
 	if (kill || !blk_queue_dying(ns->queue)) {
 		blk_mq_abort_requeue_list(ns->queue);
 		blk_cleanup_queue(ns->queue);

drivers/scsi/sd.c

@@ -3068,7 +3068,6 @@ static void scsi_disk_release(struct device *dev)
 	ida_remove(&sd_index_ida, sdkp->index);
 	spin_unlock(&sd_index_lock);
 
-	blk_integrity_unregister(disk);
 	disk->private_data = NULL;
 	put_disk(disk);
 	put_device(&sdkp->device->sdev_gendev);