linux-kernel - Re: [PATCH] kernel/watchdog: hide unused function

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Date:   Wed, 21 Jun 2017 09:42:50 -0400
From:   Don Zickus <dzickus@...hat.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Ingo Molnar <mingo@...nel.org>,
        Babu Moger <babu.moger@...cle.com>,
        Nicholas Piggin <npiggin@...il.com>,
        Konstantin Khlebnikov <khlebnikov@...dex-team.ru>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kernel/watchdog: hide unused function

On Tue, Jun 20, 2017 at 10:48:44PM +0200, Arnd Bergmann wrote:
> watchdog_update_cpus() is defined unconditionally, but only used when
> CONFIG_SYSCTL is defined:
> 
> kernel/watchdog.c:608:12: error: 'watchdog_update_cpus' defined but not used [-Werror=unused-function]
> 
> This adds another #ifdef around it.

Thanks!

Acked-by: Don Zickus <dzickus@...hat.com>

> 
> Fixes: mmotm ("kernel/watchdog: provide watchdog_nmi_reconfigure() for arch watchdogs")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  kernel/watchdog.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/kernel/watchdog.c b/kernel/watchdog.c
> index 06cd965f64d2..95361f9f3f40 100644
> --- a/kernel/watchdog.c
> +++ b/kernel/watchdog.c
> @@ -605,11 +605,13 @@ static void watchdog_disable_all_cpus(void)
>  	}
>  }
>  
> +#ifdef CONFIG_SYSCTL
>  static int watchdog_update_cpus(void)
>  {
>  	return smpboot_update_cpumask_percpu_thread(
>  		    &watchdog_threads, &watchdog_cpumask);
>  }
> +#endif
>  
>  #else /* SOFTLOCKUP */
>  static int watchdog_park_threads(void)
> @@ -630,10 +632,12 @@ static void watchdog_disable_all_cpus(void)
>  {
>  }
>  
> +#ifdef CONFIG_SYSCTL
>  static int watchdog_update_cpus(void)
>  {
>  	return 0;
>  }
> +#endif
>  
>  static void set_sample_period(void)
>  {
> -- 
> 2.9.0
>