linux-kernel - Re: [PATCH] watchdog: w83977f_wdt: Mark expected switch fall-through

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Message-ID: <268ac0e3-bcb5-f0dd-6bc2-f5dd52540b3e@roeck-us.net>
Date:   Tue, 27 Mar 2018 14:05:34 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>
Cc:     linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] watchdog: w83977f_wdt: Mark expected switch fall-through

On 03/27/2018 12:30 PM, Gustavo A. R. Silva wrote:
> In preparation to enabling -Wimplicit-fallthrough, mark switch cases
> where we are expecting to fall through.
> 
> Notice that in this particular case I replaced "Fall" with a proper
> "Fall through" comment, which is what GCC is expecting to find.
> 
> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>

Reviewed-by: Guenter Roeck <linux@...ck-us.net>

> ---
>   drivers/watchdog/w83977f_wdt.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/watchdog/w83977f_wdt.c b/drivers/watchdog/w83977f_wdt.c
> index 20e2bba..672b61a 100644
> --- a/drivers/watchdog/w83977f_wdt.c
> +++ b/drivers/watchdog/w83977f_wdt.c
> @@ -427,7 +427,7 @@ static long wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
>   			return -EINVAL;
>   
>   		wdt_keepalive();
> -		/* Fall */
> +		/* Fall through */
>   
>   	case WDIOC_GETTIMEOUT:
>   		return put_user(timeout, uarg.i);
>