linux-kernel - Re: [PATCH] coccinelle: misc: add swap script

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Date:   Thu, 18 Feb 2021 21:03:16 +0100 (CET)
From:   Julia Lawall <julia.lawall@...ia.fr>
To:     Markus Elfring <Markus.Elfring@....de>
cc:     Denis Efremov <efremov@...ux.com>, cocci@...teme.lip6.fr,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] coccinelle: misc: add swap script



On Thu, 18 Feb 2021, Markus Elfring wrote:

> > A disjunction basically says "at this node in the cfg, can I match the
> > first patter, or can I match the second pattern, etc."  Unfortunately in
> > this case the two branches start matching at different nodes, so the short
> > circuit aspect of a disjunction isn't used, and it matches both patterns.
> >
> > The solution is to just make two rules.  The first for the if case and the
> > second for everything else.
>
> Will such feedback trigger further software development considerations?

No.  This is never going to change, until someone completely redesigns
Coccinelle.

julia