linux-kernel - Re: [3/3] Coccinelle: pci_free_consistent: Extend when constraints for two SmPL ellipses

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Message-ID: <c53d5a80-7f80-535c-8394-a3289399feba@web.de>
Date:   Wed, 15 May 2019 11:40:45 +0200
From:   Markus Elfring <Markus.Elfring@....de>
To:     Julia Lawall <julia.lawall@...6.fr>
Cc:     Coccinelle <cocci@...teme.lip6.fr>,
        LKML <linux-kernel@...r.kernel.org>,
        Cheng Shengyu <cheng.shengyu@....com.cn>,
        Gilles Muller <Gilles.Muller@...6.fr>,
        Ma Jiang <ma.jiang@....com.cn>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nicolas Palix <nicolas.palix@...g.fr>,
        Wen Yang <wen.yang99@....com.cn>,
        Yi Wang <wang.yi59@....com.cn>
Subject: Re: [3/3] Coccinelle: pci_free_consistent: Extend when constraints
 for two SmPL ellipses

>>> On the other hand, I do care about causing false negatives.
>>
>> Do you find the missing warning after the addition of such an exclusion
>> specification interesting?
>
> I already suggested how to improve the code.

I find that the idea “e2->fld” needs further clarification.
Such a SmPL specification will be resolved also to an expression,
won't it?

I guess that it can fit better to other analysis approaches.
Will any script variants become more interesting?

Is it still unclear which detail (besides the added SmPL filter)
will hinder the warning display for Wen's test case?

Regards,
Markus