/* &a[0] degrades to a pointer: a different type from an array */
#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
+/* Require C Strings (i.e. NUL-terminated) lack the "nonstring" attribute. */
+#define __must_be_cstr(p) BUILD_BUG_ON_ZERO(__annotated(p, nonstring))
+
/*
* This returns a constant expression while determining if an argument is
* a constant expression, most importantly without evaluating the argument.