linux-kernel - Re: [PATCH] coccinelle: api: add device_attr

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Message-ID: <alpine.DEB.2.22.394.2006151742090.23306@hadrien>
Date:   Mon, 15 Jun 2020 17:43:06 +0200 (CEST)
From:   Julia Lawall <julia.lawall@...ia.fr>
To:     Markus Elfring <Markus.Elfring@....de>
cc:     Denis Efremov <efremov@...ux.com>,
        Coccinelle <cocci@...teme.lip6.fr>,
        Gilles Muller <Gilles.Muller@...6.fr>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nicolas Palix <nicolas.palix@...g.fr>,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] coccinelle: api: add device_attr_show script



On Mon, 15 Jun 2020, Markus Elfring wrote:

> > +// Confidence: High
>
> Would you like to add any suggestion for a possible patch message?
>
>
> …
> > +virtual report
> > +virtual org
> > +virtual context
> > +virtual patch
>
> +virtual report, org, context, patch
>
> Is such a SmPL code variant more succinct?

This doens't matter.

>
>
> …
> > +ssize_t show(struct device *dev, struct device_attribute *attr, char *buf)
> > +{
> > +	<...
> > +*	return snprintf@p(...);
> > +	...>
> > +}
>
> I suggest to reconsider the selection of the SmPL nest construct.
> https://github.com/coccinelle/coccinelle/blob/e06b9156dfa02a28cf3cbf0913a10513f3d163ab/docs/manual/cocci_syntax.tex#L783
>
> Can the construct “<+... … ...+>” become relevant here?

<... ...> is fine if the only thing that will be used afterwards is what
is inside the <... ...>

julia

>
>
> Would you like to consider any further software design consequences
> around the safe application of the asterisk functionality in rules
> for the semantic patch language?
>
> Regards,
> Markus
>