netdev - Re: [PATCH] ath9k: remove set but not used variable 'acq'

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Date:   Mon, 25 Feb 2019 12:04:43 +0100
From:   Toke Høiland-Jørgensen <toke@...hat.com>
To:     Kalle Valo <kvalo@...eaurora.org>
Cc:     YueHaibing <yuehaibing@...wei.com>,
        QCA ath9k Development <ath9k-devel@....qualcomm.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] ath9k: remove set but not used variable 'acq'

Kalle Valo <kvalo@...eaurora.org> writes:

> Toke Høiland-Jørgensen <toke@...hat.com> writes:
>
>> Kalle Valo <kvalo@...eaurora.org> writes:
>>
>>> Toke Høiland-Jørgensen <toke@...hat.com> writes:
>>>
>>>> YueHaibing <yuehaibing@...wei.com> writes:
>>>>
>>>>> Fixes gcc '-Wunused-but-set-variable' warning:
>>>>>
>>>>> drivers/net/wireless/ath/ath9k/recv.c: In function 'ath_rx_count_airtime':
>>>>> drivers/net/wireless/ath/ath9k/recv.c:1010:18: warning:
>>>>>  variable 'acq' set but not used [-Wunused-but-set-variable]
>>>>>
>>>>> It's not used after 89cea7493a34 ("ath9k: Switch to mac80211 TXQ scheduling
>>>>> and airtime APIs"). Also remove related variables.
>>>>
>>>> Ah, right, seems I forgot to clean that up. I wonder why I didn't get a
>>>> compiler warning for it.
>>>
>>> I think the warning is not enabled by default and you need to use W=1
>>> Makefile variable to enable it.
>>
>> Hmm, right, thanks! Guess I should get into the habit of compiling with
>> warnings enabled before submitting patches :)
>
> But you might get a lot of warnings and it could be difficult to find
> new warnings from all the noise. In ath10k I just fixed all W=1 warnings
> which I saw with gcc 8.1 and only now I was able to enable W=1 on my
> build script.

Ah, that was what that patch series was about :)

Right, well, I guess I'll give it a shot at some point and if it's not
too annoying I'll try to keep an eye on the warnings output...

-Toke