[XEN PATCH 9/9] xen/compat: address Rule 10.1 for macros CHECK_SIZE

[Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>]

The essential type of the result of an inequality operator is
essentially boolean, therefore it shouldn't be used as an argument of
the multiplication operator, which expects an integer.

Signed-off-by: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
---
 xen/include/xen/compat.h | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/xen/include/xen/compat.h b/xen/include/xen/compat.h
index f2ce5bb3580a..5ffee6a9fed1 100644
--- a/xen/include/xen/compat.h
+++ b/xen/include/xen/compat.h
@@ -151,12 +151,14 @@ CHECK_NAME_(k, n, T)(k xen_ ## n *x, \
     return x == c; \
 }
 
+#define SIZE_NEQUAL(a, b) \
+    (sizeof(a) != sizeof(b) ? 1 : 0)
 #define CHECK_SIZE(name) \
-    typedef int CHECK_NAME(name, S)[1 - (sizeof(xen_ ## name ## _t) != \
-                                         sizeof(compat_ ## name ## _t)) * 2]
+    typedef int CHECK_NAME(name, S)[1 - (SIZE_NEQUAL(xen_ ## name ## _t, \
+                                                     compat_ ## name ## _t)) * 
2]
 #define CHECK_SIZE_(k, n) \
-    typedef int CHECK_NAME_(k, n, S)[1 - (sizeof(k xen_ ## n) != \
-                                          sizeof(k compat_ ## n)) * 2]
+    typedef int CHECK_NAME_(k, n, S)[1 - (SIZE_NEQUAL(k xen_ ## n, \
+                                                      k compat_ ## n)) * 2]
 
 #define CHECK_FIELD_COMMON(name, t, f) \
 static inline int __maybe_unused name(xen_ ## t ## _t *x, compat_ ## t ## _t 
*c) \
-- 
2.34.1