linux-kernel - Re: coccinelle: api/devm_platform_ioremap

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Date:   Sat, 19 Oct 2019 21:43:05 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     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, 19 Oct 2019 12:35:49 +0100,
Markus Elfring <Markus.Elfring@....de> wrote:
> 
> > I think part of the issue is that the script reports a WARNING
> 
> How much does this information influence really the stress tolerance
> and change resistance (or acceptance) for the presented collateral evolution?
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/scripts/coccinelle/api/devm_platform_ioremap_resource.cocci

-ENOPARSE.

> > for something that is definitely correct code,
> 
> Can related software improvement possibilities be taken into account
> again under other circumstances?

These patches provide no improvement whatsoever. As pointed out, they
mostly introduce bugs.

> > and could instead be simply toned down.
> 
> Does this view mean that the mentioned script for the semantic patch language
> should get another chance for integration?

Providing Coccinelle scripts that scream about perfectly valid code is
pointless, and the result is actively harmful.

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. But that's not what this is about.

> > Anyway, FWIW:
> >
> > Acked-by: Marc Zyngier <maz@...nel.org>
> 
> Would you like to share any more constructive feedback?

No.

> Will similar source file mass updates be better picked up
> by other well-known Linux developers?

Certainly not for the subsystems I maintain.

	M.

-- 
Jazz is not dead, it just smells funny.