Date:	Wed, 7 Jan 2015 09:57:49 +0100
From:	Arend van Spriel <arend@...adcom.com>
To:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
CC:	Kalle Valo <kvalo@...eaurora.org>,
	Larry Finger <Larry.Finger@...inger.net>,
	Brett Rudley <brudley@...adcom.com>,
	"Hante Meuleman" <meuleman@...adcom.com>,
	Fabian Frederick <fabf@...net.be>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	<brcm80211-dev-list@...adcom.com>,
	Network Development <netdev@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Julia Lawall <Julia.Lawall@...6.fr>
Subject: Re: [PATCH] brcm80211: brcmsmac: dma: Remove some unused functions

On 01/07/15 00:33, Rickard Strandqvist wrote:
> 2015-01-05 12:06 GMT+01:00 Arend van Spriel<arend@...adcom.com>:
>> On 01/05/15 11:49, Kalle Valo wrote:
>>>
>>> Rickard Strandqvist<rickard_strandqvist@...ctrumdigital.se>   writes:
>>>
>>>> As I hope you can see I have made some changes regarding the
>>>> subject-line. Thought it was an advantage to be able to see which file
>>>> I actually removed something from. There seems to be a big focus on
>>>> getting right on subject-line right in recent weeks.
>>>>
>>>> I wonder why there is a script that takes a file name, and respond
>>>> with an appropriate subject line?
>>
>>
>> Is there a script for this? Anyway, I would say driver name is enough.
>> Enough about the subject line ;-) I would like to give some general remarks
>> as you seem to touch a lot of kernel code. First off, I think it is good to
>> remove unused stuff. However, I would like some more explanation on your
>> methodology apart from "partially found by using a static code analysis
>> program". So a cover-letter explaining that would have been nice (maybe
>> still is). Things like Kconfig option can affect whether function are used
>> or not so how did you cover that.
>>
>> Regards,
>> Arend
>>
>>
>>> I don't think you can really automate this as some drivers do this a bit
>>> differently. You always need to manually check the commit log.
>>>
>>>> But ok, I change my script accordingly. Should I submit the patch again?
>>>
>>>
>>> Yes, please resubmit.
>>>
>>
>
> Hi Arend
>
> Yes, a script that had been excellent, I think!
> I have one as part of my git send-email script, until a week ago, it
> was enough that I removed the "drivers/" and changed all "/" to ": "
> I have now been expanded my sed pipe a lot (tell me if anyone is interested)
> But now I've seen everything from uppercase and [DIR], etc.
> So I can not understand how anyone should be able to get the right
> name without a good help.
>
> Sure i like to share how I use cppcheck, but is very hesitant to write
> this with each patch mails I send though!
>
> I run:
> cppcheck --force --quiet --enable=all .

And . is the top-level directory in the kernel repo? I am not familiar 
with cppcheck, but does it invoke the kernel Makefile. From a quick 
glance on cppcheck webpage I guess you could enable only the unused 
function checker.

> Or a specific file instead of .
>
> This will include, among other things get a lot of error message such,
> +4000 for the kernel.
> (style) The function 'xxx' is never used
>
> For these I made a script that searched through all the files after
> the function name (cppcheck missed a few). And save the rest so I go
> through them and possibly send patches.

All the file? Within the same driver or kernel-wide. So now "go through 
them" means compile testing with applicable Kconfig selections?

Gr. AvS
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