linux-kernel - Re: Coccinelle: semantic patch for missing of_node

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Date:   Tue, 4 Jun 2019 07:08:35 +0200
From:   Markus Elfring <Markus.Elfring@....de>
To:     Wen Yang <wen.yang99@....com.cn>,
        Julia Lawall <julia.lawall@...6.fr>, linux-doc@...r.kernel.org
Cc:     cocci@...teme.lip6.fr, linux-kernel@...r.kernel.org,
        Gilles Muller <Gilles.Muller@...6.fr>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nicolas Palix <nicolas.palix@...g.fr>
Subject: Re: Coccinelle: semantic patch for missing of_node_put

> 2, A general method.
> We also try to get the list of functions to consider by writing a SmPL,
> but this method is not feasible at present, because it is not easy to parse the comment
> header information of these functions.

The situation was improved once more also for the Coccinelle software.
How do you think about to develop any more variants based on information
from a script (like the following) for the semantic patch language?

@initialize:python@
@@
import re, sys
filter = re.compile(" when done")

@find@
comments c;
identifier x;
type t;
@@
 t@c x(...)
 { ... }

@script:python selection@
input << find.c;
@@
if filter.search(input[0].before, 2):
   sys.stderr.write(input[0].before + "\n=====\n")
else:
   cocci.include_match(False)

@display@
identifier find.x;
type find.t;
@@
*t x(...)
 { ... }


Does such a source code analysis approach indicate any details
which should be improved for the affected software documentation?

Regards,
Markus