From: Julien Grall <julien.grall@citrix.com>
Date: Thu, 24 Sep 2015 21:02:23 +0000 (+0100)
Subject: Make sure the interface version is always correctly set
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=21abc7694d88b3a671e64f25587a38c0e777b359;p=people%2Fjulieng%2Ffreebsd.git

Make sure the interface version is always correctly set
---

diff --git a/sys/xen/interface/xen-compat.h b/sys/xen/interface/xen-compat.h
index d8c55bfc8f63..c1cc562c0fab 100644
--- a/sys/xen/interface/xen-compat.h
+++ b/sys/xen/interface/xen-compat.h
@@ -33,8 +33,11 @@
 /* Xen is built with matching headers and implements the latest interface. */
 #define __XEN_INTERFACE_VERSION__ __XEN_LATEST_INTERFACE_VERSION__
 #elif !defined(__XEN_INTERFACE_VERSION__)
-/* Guests which do not specify a version get the legacy interface. */
-#define __XEN_INTERFACE_VERSION__ 0x00000000
+/*
+ * The interface version is not set if and only if xen/xen-os.h is not
+ * included.
+ */
+#error "Please include xen/xen-os.h"
 #endif
 
 #if __XEN_INTERFACE_VERSION__ > __XEN_LATEST_INTERFACE_VERSION__