Index: xen-4.1.2-testing/tools/blktap/drivers/blktapctrl.c
===================================================================
--- xen-4.1.2-testing.orig/tools/blktap/drivers/blktapctrl.c
+++ xen-4.1.2-testing/tools/blktap/drivers/blktapctrl.c
@@ -59,6 +59,9 @@
 #include "list.h"
 #include "xs_api.h" /* for xs_fire_next_watch() */
 
+#undef DPRINTF
+#define DPRINTF(_f, _a...) ((void)0)
+
 #define PIDFILE "/var/run/blktapctrl.pid"
 
 #define NUM_POLL_FDS 2
Index: xen-4.1.2-testing/tools/ioemu-qemu-xen/hw/xen_blktap.c
===================================================================
--- xen-4.1.2-testing.orig/tools/ioemu-qemu-xen/hw/xen_blktap.c
+++ xen-4.1.2-testing/tools/ioemu-qemu-xen/hw/xen_blktap.c
@@ -48,7 +48,7 @@
 #define BLKTAP_CTRL_DIR "/var/run/tap"
 
 /* If enabled, print debug messages to stderr */
-#if 1
+#if 0
 #define DPRINTF(_f, _a...) fprintf(stderr, __FILE__ ":%d: " _f, __LINE__, ##_a)
 #else
 #define DPRINTF(_f, _a...) ((void)0)