linux-kernel - Re: [PATCH v3 3/4] trigger: ledtrig-tty: move variable definition to the top

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Date:   Thu, 19 Oct 2023 11:12:53 +0200
From:   m.brock@...mierlo.com
To:     Florian Eckert <fe@....tdt.de>
Cc:     Eckert.Florian@...glemail.com, gregkh@...uxfoundation.org,
        jirislaby@...nel.org, pavel@....cz, lee@...nel.org,
        kabel@...nel.org, u.kleine-koenig@...gutronix.de,
        linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
        linux-leds@...r.kernel.org, kernel test robot <lkp@...el.com>
Subject: Re: [PATCH v3 3/4] trigger: ledtrig-tty: move variable definition to
 the top

Florian Eckert wrote on 2023-10-16 11:12:
> On 2023-10-16 10:46, m.brock@...mierlo.com wrote:
>> Florian Eckert wrote on 2023-10-16 09:13:
>>> Has complained about the following construct:
>> 
>> Who is "Has" or who/what has complained?
> 
> The test robot who does not agree with my change in the v1 patchset.

You don't have to explain to me, just fix the comment.

>>> drivers/leds/trigger/ledtrig-tty.c:362:3: error: a label can only be
>>> part of a statement and a declaration is not a statement
>>> 
>>> Hence move the variable definition to the beginning of the function.
>>> 
>>> Reported-by: kernel test robot <lkp@...el.com>
>>> Closes:
>>> https://lore.kernel.org/oe-kbuild-all/202309270440.IJB24Xap-lkp@intel.com/
>>> Signed-off-by: Florian Eckert <fe@....tdt.de>
>>> ---
>>> @@ -124,8 +125,6 @@ static void ledtrig_tty_work(struct work_struct 
>>> *work)
>>> 
>>>  	if (icount.rx != trigger_data->rx ||
>>>  	    icount.tx != trigger_data->tx) {
>>> -		unsigned long interval = LEDTRIG_TTY_INTERVAL;
>>> -
>> 
>> Is this kernel test robot broken?
> 
> The test robot does nothing wrong.
> 
>> I see no label definition here.
>> And this variable declaration is at the start of a new block which 
>> does
>> not even require C99 support.
> 
> I made change in patch set v1, that moves the definition of the 
> variable
> `interval` into the switch case statement.
> https://lore.kernel.org/linux-leds/20230926093607.59536-3-fe@dev.tdt.de/
> The robot complained about this.
> 
> So I decided to move the definition of the variable 'interval' to 
> function
> head to make the test robot happy in the commit. So this commit 
> prepares
> the code for my change.
> 
> If it is more common, I can merge this patch [1] into the next patch 
> [2]
> of this set.

Yes, please. You're fixing a problem that does not exist yet (and never
will), because the patch that introduces it is not yet applied. So fix
the proposed patch instead of patching the patch.

> [1] 
> https://lore.kernel.org/linux-leds/20231016071332.597654-4-fe@dev.tdt.de/
> [2] 
> https://lore.kernel.org/linux-leds/20231016071332.597654-5-fe@dev.tdt.de/
> 
> 
> Florian

Maarten