diff -NurpP --minimal linux-2.6.38-vs2.3.0.37-rc7/drivers/block/vroot.c linux-2.6.38-vs2.3.0.37-rc8/drivers/block/vroot.c
--- linux-2.6.38-vs2.3.0.37-rc7/drivers/block/vroot.c	2011-01-29 02:01:07.000000000 +0100
+++ linux-2.6.38-vs2.3.0.37-rc8/drivers/block/vroot.c	2011-03-17 18:14:05.000000000 +0100
@@ -145,6 +145,13 @@ static struct block_device_operations vr
 	.ioctl =	vr_ioctl,
 };
 
+static int vroot_make_request(struct request_queue *q, struct bio *bio)
+{
+	printk("vroot_make_request %p, %p\n", q, bio);
+	bio_io_error(bio);
+	return 0;
+}
+
 struct block_device *__vroot_get_real_bdev(struct block_device *bdev)
 {
 	struct inode *inode = bdev->bd_inode;
@@ -166,6 +173,8 @@ struct block_device *__vroot_get_real_bd
 	return real_bdev;
 }
 
+
+
 /*
  * And now the modules code and kernel interface.
  */
@@ -211,6 +220,7 @@ int __init vroot_init(void)
 		disks[i]->queue = blk_alloc_queue(GFP_KERNEL);
 		if (!disks[i]->queue)
 			goto out_mem3;
+		blk_queue_make_request(disks[i]->queue, vroot_make_request);
 	}
 
 	for (i = 0; i < max_vroot; i++) {