linux-kernel - Re: [v2] coccinelle: semantic code search for missing of_node

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Date:   Thu, 4 Jul 2019 08:28:19 +0200
From:   Markus Elfring <Markus.Elfring@....de>
To:     Wen Yang <wen.yang99@....com.cn>,
        Julia Lawall <julia.lawall@...6.fr>
Cc:     Yi Wang <wang.yi59@....com.cn>,
        Gilles Muller <Gilles.Muller@...6.fr>,
        Nicolas Palix <nicolas.palix@...g.fr>,
        Michal Marek <michal.lkml@...kovi.net>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        cocci@...teme.lip6.fr, linux-kernel@...r.kernel.org
Subject: Re: [v2] coccinelle: semantic code search for missing of_node_put

> We tested and found that both <...x...> and <+... x ...+> variants work fine.

Is the difference in the functionality from this SmPL construct clear already?


> We use <... x ...> instead of <+... x ...+> here to eliminate the following false positives:

Do we stumble on another software design challenge?

For which function parameter will the specified variable be required finally?


> 486 asd = v4l2_async_notifier_add_fwnode_subdev(
> 487 &camss->notifier, of_fwnode_handle(remote), ---> v4l2_async_notifier_add_fwnode_subdev will pass remote to camss->notifier.
> 488 sizeof(*csd));

Should any more special cases be taken better into account?

Regards,
Markus