--- a/arch/um/drivers/ubd_kern.c	2012-06-01 10:18:44.000000000 +0300
+++ b/arch/um/drivers/ubd_kern.c	2012-06-07 03:41:44.790899305 +0300
@@ -514,7 +514,7 @@
 		goto out;
 	}
 
-	fd = os_open_file(ubd_dev->file, global_openflags, 0);
+	fd = os_open_file(ubd_dev->file, of_read(OPENFLAGS()), 0);
 	if (fd < 0)
 		return fd;