Index: xen-4.3.0-testing/extras/mini-os/lib/math.c
===================================================================
--- xen-4.3.0-testing.orig/extras/mini-os/lib/math.c
+++ xen-4.3.0-testing/extras/mini-os/lib/math.c
@@ -186,6 +186,7 @@ __qdivrem(u_quad_t uq, u_quad_t vq, u_qu
 	 * and thus
 	 *	m = 4 - n <= 2
 	 */
+	tmp.ul[H] = tmp.ul[L] = 0;
 	tmp.uq = uq;
 	u[0] = 0;
 	u[1] = HHALF(tmp.ul[H]);