linux-kernel - Re: coccinelle: api/devm_platform_ioremap

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Date:   Sat, 19 Oct 2019 15:13:24 -0700
From:   Joe Perches <joe@...ches.com>
To:     Marc Zyngier <maz@...nel.org>,
        Markus Elfring <Markus.Elfring@....de>
Cc:     Himanshu Jha <himanshujha199640@...il.com>,
        Julia Lawall <julia.lawall@...6.fr>,
        kernel-janitors@...r.kernel.org,
        Coccinelle <cocci@...teme.lip6.fr>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        linux-kernel@...r.kernel.org,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Arnd Bergmann <arnd@...db.de>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Gilles Muller <Gilles.Muller@...6.fr>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linus Torvalds <torvalds@...uxfoundation.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nicolas Palix <nicolas.palix@...g.fr>,
        Thomas Gleixner <tglx@...utronix.de>,
        YueHaibing <yuehaibing@...wei.com>
Subject: Re: coccinelle: api/devm_platform_ioremap_resource: remove useless
 script

On Sat, 2019-10-19 at 21:43 +0100, Marc Zyngier wrote:
> Providing Coccinelle scripts that scream about perfectly valid code is
> pointless, and the result is actively harmful.

Doubtful.

If the new code is smaller object code and correct
than the conversion is worthwhile.

fyi:

There are already ~450 uses of this function and maybe
~800 possible additional conversions.

> If said script was providing a correct semantic patch instead of being
> an incentive for people to churn untested patches that span the whole
> tree, that'd be a different story.

Right.