diff -urN 2.4.5ac2/fs/block_dev.c 2.4.5ac3/fs/block_dev.c
--- 2.4.5ac2/fs/block_dev.c	Mon May 28 04:04:03 2001
+++ 2.4.5ac3/fs/block_dev.c	Mon May 28 20:07:18 2001
@@ -602,6 +602,7 @@
 	if (!bdev->bd_op->ioctl)
 		return -EINVAL;
 	inode_fake.i_rdev=rdev;
+	inode_fake.i_bdev=bdev;
 	init_waitqueue_head(&inode_fake.i_wait);
 	set_fs(KERNEL_DS);
 	res = bdev->bd_op->ioctl(&inode_fake, NULL, cmd, arg);