linux-kernel - Re: [PATCH v2] module: LLVMLinux: Remove unused function warning from __param

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Date:	Fri, 07 Mar 2014 18:17:54 -0800
From:	Joe Perches <joe@...ches.com>
To:	behanw@...verseincode.com
Cc:	khali@...ux-fr.org, rostedt@...dmis.org, rusty@...tcorp.com.au,
	linux-kernel@...r.kernel.org, dwmw2@...radead.org,
	pageexec@...email.hu, Mark Charlebois <charlebm@...il.com>
Subject: Re: [PATCH v2] module: LLVMLinux: Remove unused function warning
 from __param_check macro

On Fri, 2014-03-07 at 18:10 -0800, behanw@...verseincode.com wrote:
> 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,
>  /* 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); }

Perhaps __maybe_unused ?


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