linux-kernel - Re: [PATCH 1/1] KERNEL: add __attribute_

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Message-Id: <20140507152557.7bf8998f900c5f2054295e68@linux-foundation.org>
Date:	Wed, 7 May 2014 15:25:57 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Fabian Frederick <fabf@...net.be>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [PATCH 1/1] KERNEL: add __attribute__  in c file

On Wed, 7 May 2014 22:33:39 +0200 Fabian Frederick <fabf@...net.be> wrote:

> This patch fixes a sparse warning about noreturn attribute only
> featuring in module.h
> 
> kernel/module.c:212:6: error: symbol '__module_put_and_exit' redeclared with
> different type (originally declared at include/linux/module.h:449)-
> different modifiers
> 
> ...
>
> --- a/include/linux/module.h
> +++ b/include/linux/module.h
> @@ -446,8 +446,8 @@ int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
>  					     struct module *, unsigned long),
>  				   void *data);
>  
> -extern void __module_put_and_exit(struct module *mod, long code)
> -	__attribute__((noreturn));
> +extern void __attribute__((noreturn)) __module_put_and_exit(struct module *mod,
> +							    long code);
>  #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code)
>  
>  #ifdef CONFIG_MODULE_UNLOAD
> diff --git a/kernel/module.c b/kernel/module.c
> index 079c461..7d78872 100644
> --- a/kernel/module.c
> +++ b/kernel/module.c
> @@ -209,7 +209,8 @@ static inline void add_taint_module(struct module *mod, unsigned flag,
>   * A thread that wants to hold a reference to a module only while it
>   * is running can call this to safely exit.  nfsd and lockd use this.
>   */
> -void __module_put_and_exit(struct module *mod, long code)
> +void __attribute__((noreturn)) __module_put_and_exit(struct module *mod,
> +						     long code)
>  {

Can we use __noreturn here?
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