linux-kernel - Re: Coccinelle: Checking the deletion of duplicate of_node

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Date:   Wed, 10 Jul 2019 07:55:40 +0200
From:   Markus Elfring <Markus.Elfring@....de>
To:     Wen Yang <wen.yang99@....com.cn>,
        Julia Lawall <julia.lawall@...6.fr>,
        Coccinelle <cocci@...teme.lip6.fr>
Cc:     Allison Randal <allison@...utok.net>,
        Armijn Hemel <armijn@...ldur.nl>,
        Cheng Shengyu <cheng.shengyu@....com.cn>,
        "David S. Miller" <davem@...emloft.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Thomas Gleixner <tglx@...utronix.de>,
        Xue Zhihong <xue.zhihong@....com.cn>,
        Yi Wang <wang.yi59@....com.cn>, linux-crypto@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: Coccinelle: Checking the deletion of duplicate of_node_put()
 calls with SmPL

> But I wonder at the moment why it does not work (as expected) for the original
> complete source file.

I discovered that a diff hunk (or usable patch?) is generated
if the return statement is deleted (or commented out) before the jump label
which refers to a potentially unwanted function call at the mentioned place.
How will the support evolve for automatic adjustment of such source code
combinations by the semantic patch language (Coccinelle software)?

Regards,
Markus