linux-kernel - Re: [PATCH] mtd: phram: Mark expected switch fall-throughs

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Date:   Wed, 10 Apr 2019 16:16:33 -0500
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Joern Engel <joern@...ybastard.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Boris Brezillon <bbrezillon@...nel.org>,
        Marek Vasut <marek.vasut@...il.com>,
        Richard Weinberger <richard@....at>
Cc:     linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH] mtd: phram: Mark expected switch fall-throughs

Hi all,

If no one cares I'll add this to my tree for 5.2.

Thanks
--
Gustavo

On 3/20/19 3:19 PM, Gustavo A. R. Silva wrote:
> Hi all,
> 
> Friendly ping:
> 
> Who can take this?
> 
> Thanks
> --
> Gustavo
> 
> On 2/8/19 12:09 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 warnings:
>>
>> drivers/mtd/devices/phram.c: In function ‘parse_num64’:
>> drivers/mtd/devices/phram.c:149:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
>>      shift += 10;
>>      ~~~~~~^~~~~
>> drivers/mtd/devices/phram.c:150:4: note: here
>>     case 'M':
>>     ^~~~
>> drivers/mtd/devices/phram.c:151:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
>>      shift += 10;
>>      ~~~~~~^~~~~
>> drivers/mtd/devices/phram.c:152:4: note: here
>>     case 'k':
>>     ^~~~
>>
>> Warning level 3 was used: -Wimplicit-fallthrough=3
>>
>> This patch is part of the ongoing efforts to enabling
>> -Wimplicit-fallthrough.
>>
>> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
>> ---
>>  drivers/mtd/devices/phram.c | 2 ++
>>  1 file changed, 2 insertions(+)
>>
>> diff --git a/drivers/mtd/devices/phram.c b/drivers/mtd/devices/phram.c
>> index 9ee04b5f9311..8a8627c30aed 100644
>> --- a/drivers/mtd/devices/phram.c
>> +++ b/drivers/mtd/devices/phram.c
>> @@ -147,8 +147,10 @@ static int parse_num64(uint64_t *num64, char *token)
>>  			switch (token[len - 2]) {
>>  			case 'G':
>>  				shift += 10;
>> +				/* fall through */
>>  			case 'M':
>>  				shift += 10;
>> +				/* fall through */
>>  			case 'k':
>>  				shift += 10;
>>  				token[len - 2] = 0;
>>