linux-kernel - Re: s3c24xx: Use devm_kcalloc() in s3c24xx_dma

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Date:   Sun, 23 Apr 2017 14:18:15 +0200
From:   Tobias Jakobi <tjakobi@...h.uni-bielefeld.de>
To:     SF Markus Elfring <elfring@...rs.sourceforge.net>,
        dmaengine@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org
Cc:     Dan Williams <dan.j.williams@...el.com>,
        Javier Martinez Canillas <javier@....samsung.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Kukjin Kim <kgene@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: s3c24xx: Use devm_kcalloc() in s3c24xx_dma_probe()

SF Markus Elfring wrote:
>>> WARNING: Prefer devm_kcalloc over devm_kzalloc with multiply
>> For example. Also I just noticed some previous comment by Krzysztof that
>> pointed that out already.
>>
>> My suggestion: One sentence describing that the current situation is.
> 
> Why do you find the sentence for the multiplication information inappropriate
> (or incomplete) at the moment?
I already explained that. It's a 1:1 translation of a german sentence
into English. A native speaker does not write or speak like that. If in
doubt, don't use long sentences (with nesting, etc.) at all, and break
things down into logical blocks.


>> Another sentence explaining why this is bad/undesirable.
> 
> Which details do you miss here?
Pretty much everything.


>> In this case, the output of the checkpatch script would come in handy.
> 
> Its implementation of the check “ALLOC_WITH_MULTIPLY” considers only an other
> search pattern so far.
> 
> * Do you find it worthwhile to add a prefix like “devm_” to the used
>   regular expression?
> 
> * Would like to improve any related scripts for the semantic patch language
>   (Coccinelle software) a bit more?
I don't understand why you're asking this. I'm talking about the
_output_ of checkpatch, not about the script itself.

But undoubtedly your patch is motivated by the output of said tool.
Hence you should mention that.

- Tobias


>> With this, you avoid cramming every information into one long and
>> complicated sentence.
> 
> Thanks for your feedback about other wording preferences.
> 
> Regards,
> Markus
>