Linux 5.10 compat: check_disk_change() removed

Kernel 5.10 removed check_disk_change() in favor of callers using
the faster bdev_check_media_change() instead, and explicitly forcing
bdev revalidation when they desire that behavior. To preserve prior
behavior, I have wrapped this into a zfs_check_media_change() macro
that calls an inline function for the new API that mimics the old
behavior when check_disk_change() doesn't exist, and just calls
check_disk_change() if it exists.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Coleman Kane <ckane@colemankane.org>
Closes #11085

module/os/linux/zfs/vdev_disk.c

@@ -791,7 +791,7 @@ vdev_disk_io_done(zio_t *zio)
 		vdev_t *v = zio->io_vd;
 		vdev_disk_t *vd = v->vdev_tsd;
 
-		if (check_disk_change(vd->vd_bdev)) {
+		if (zfs_check_media_change(vd->vd_bdev)) {
 			invalidate_bdev(vd->vd_bdev);
 			v->vdev_remove_wanted = B_TRUE;
 			spa_async_request(zio->io_spa, SPA_ASYNC_REMOVE);

module/os/linux/zfs/zvol_os.c

@@ -503,7 +503,7 @@ zvol_open(struct block_device *bdev, fmode_t flag)
 	if (drop_suspend)
 		rw_exit(&zv->zv_suspend_lock);
 
-	check_disk_change(bdev);
+	zfs_check_media_change(bdev);
 
 	return (0);