On Fri, 2014-03-07 at 18:10 -0800, behanw@xxxxxxxxxxxxxxxxxx wrote:I thought about that (and even tested with __maybe_unused), but I *think* they are always unused, except at compile time (see comment above). Though I could be wrong.
This code makes a compile time type check that is optimized away. Clang[]
complains that it generates an unused function.
diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h[]
@@ -346,7 +346,7 @@ static inline void destroy_params(const struct kernel_param *params,Perhaps __maybe_unused ?
/* The macros to do compile-time type checking stolen from Jakub
Jelinek, who IIRC came up with this idea for the 2.4 module init code. */
#define __param_check(name, p, type) \
- static inline type *__check_##name(void) { return(p); }
+ static inline __always_unused type *__check_##name(void) { return(p); }