diff -r ca12928cdafe drivers/xen/blktap/blktap.c
--- a/drivers/xen/blktap/blktap.c	Mon Jun 08 12:23:24 2009 +0100
+++ b/drivers/xen/blktap/blktap.c	Tue Jun 09 16:40:49 2009 +0100
@@ -733,7 +733,7 @@ static int blktap_mmap(struct file *filp
 		goto fail;
 	}
 
-	vma->vm_private_data = info->foreign_map.map;
+	vma->vm_private_data = &info->foreign_map;
 	vma->vm_flags |= VM_FOREIGN;
 	vma->vm_flags |= VM_DONTCOPY;