xen: constify xsd_errors array

The 'xsd_errors' array is initialized in the declaration and never
changed. So, constify it to reduce the attack surface.

At the same time, use the preferred '__maybe_unused' form over the
'__attribute__((unused))' form.

Signed-off-by: Len Bao <len.bao@gmx.us>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Message-ID: <20260523140809.30915-1-len.bao@gmx.us>

diff --git a/include/xen/interface/io/xs_wire.h b/include/xen/interface/io/xs_wire.h
index b62365478ac00d42c93ba44a710adeaf02d49be1..29d0394b8154de0ff70bf6cf44c5c12e26c76f29 100644 (file)
--- a/include/xen/interface/io/xs_wire.h
+++ b/include/xen/interface/io/xs_wire.h
@@ -51,7 +51,7 @@ struct xsd_errors
     const char *errstring;
 };
 #define XSD_ERROR(x) { x, #x }
-static struct xsd_errors xsd_errors[] __attribute__((unused)) = {
+static const struct xsd_errors xsd_errors[] __maybe_unused = {
     XSD_ERROR(EINVAL),
     XSD_ERROR(EACCES),
     XSD_ERROR(EEXIST),