linux-kernel - Re: [PATCH] watchdog: pc87413: Mark expected switch fall-through

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Date:   Mon, 18 Feb 2019 11:50:28 -0600
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Guenter Roeck <linux@...ck-us.net>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>
Cc:     linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org,
        Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH] watchdog: pc87413: Mark expected switch fall-through



On 2/18/19 10:09 AM, Guenter Roeck wrote:
> On 2/14/19 12:26 PM, Gustavo A. R. Silva wrote:
>> In preparation to enabling -Wimplicit-fallthrough, mark switch
>> cases where we are expecting to fall through.
>>
>> This patch fixes the following warning:
>>
>> drivers/watchdog/pc87413_wdt.c: In function ‘pc87413_ioctl’:
>> drivers/watchdog/pc87413_wdt.c:439:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
>>     pc87413_refresh();
>>     ^~~~~~~~~~~~~~~~~
>> drivers/watchdog/pc87413_wdt.c:441:2: note: here
>>    case WDIOC_GETTIMEOUT:
>>    ^~~~
>>
>> Warning level 3 was used: -Wimplicit-fallthrough=3
>>
>> Notice that, in this particular case, the code comment is modified
>> in accordance with what GCC is expecting to find.
>>
>> This patch is part of the ongoing efforts to enable
>> -Wimplicit-fallthrough.
>>
>> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
> 
> Reviewed-by: Guenter Roeck <linux@...ck-us.net>
> 

Thanks, Guenter.

--
Gustavo