linux-kernel - Re: [PATCH] sysctl: fix unused proc_cap

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Date:   Wed, 14 Jun 2023 09:09:10 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Arnd Bergmann <arnd@...nel.org>,
        Luis Chamberlain <mcgrof@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Peter Zijlstra <peterz@...radead.org>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Huacai Chen <chenhuacai@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sysctl: fix unused proc_cap_handler() function warning



On 6/7/23 05:08, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> Since usermodehelper_table() is marked static now, we get a
> warning about it being unused when SYSCTL is disabled:
> 
> kernel/umh.c:497:12: error: 'proc_cap_handler' defined but not used [-Werror=unused-function]
> 
> Just move it inside of the same #ifdef.
> 
> Fixes: e6944e3b75df7 ("sysctl: move umh sysctl registration to its own file")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>


Acked-by: Randy Dunlap <rdunlap@...radead.org>
Tested-by: Randy Dunlap <rdunlap@...radead.org> # build-tested

Thanks.

> ---
>  kernel/umh.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/kernel/umh.c b/kernel/umh.c
> index d5dc3cc92d5c6..2f9249c2bf6ce 100644
> --- a/kernel/umh.c
> +++ b/kernel/umh.c
> @@ -494,6 +494,7 @@ int call_usermodehelper(const char *path, char **argv, char **envp, int wait)
>  }
>  EXPORT_SYMBOL(call_usermodehelper);
>  
> +#if defined(CONFIG_SYSCTL)
>  static int proc_cap_handler(struct ctl_table *table, int write,
>  			 void *buffer, size_t *lenp, loff_t *ppos)
>  {
> @@ -544,7 +545,6 @@ static int proc_cap_handler(struct ctl_table *table, int write,
>  	return 0;
>  }
>  
> -#if defined(CONFIG_SYSCTL)
>  static struct ctl_table usermodehelper_table[] = {
>  	{
>  		.procname	= "bset",

-- 
~Randy