linux-kernel - Re: [PATCH v2 10/10] pinctrl: tegra: Switch to use DEFINE_NOIRQ_DEV_PM

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Date:   Tue, 18 Jul 2023 15:50:35 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Balsam CHIHI <bchihi@...libre.com>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-renesas-soc@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-pm@...r.kernel.org, Andy Shevchenko <andy@...nel.org>,
        Sean Wang <sean.wang@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Ludovic Desroches <ludovic.desroches@...rochip.com>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>
Subject: Re: [PATCH v2 10/10] pinctrl: tegra: Switch to use
 DEFINE_NOIRQ_DEV_PM_OPS() helper

On Tue, Jul 18, 2023 at 2:55 PM Paul Cercueil <paul@...pouillou.net> wrote:
> Le mardi 18 juillet 2023 à 13:41 +0200, Thierry Reding a écrit :
> > On Tue, Jul 18, 2023 at 10:42:47AM +0200, Paul Cercueil wrote:

...

> > Looking at the definition of EXPORT_GPL_DEV_PM_OPS(), it will cause
> > an
> > EXPORT_SYMBOL_GPL() to be added. So there very well is a change. And
> > it's a completely bogus change because no module is ever going to use
> > that symbol. If we were to ever support building the pinctrl driver
> > as
> > a module, then this would perhaps make sense, but we don't.
>
> In this particular case the EXPORT_SYMBOL_GPL() isn't really important,
> the rest of EXPORT_GPL_DEV_PM_OPS() is.
>
> I don't think having a symbol exported it is a big deal, TBH, if you
> use the namespaced version. If you really don't want that, we need a
> version of EXPORT_GPL_DEV_PM_OPS() that doesn't export the symbol.

Ah, I agree with Thierry and it is another point why I do not like
those EXPORT*PM_OPS() macros.
Polluting an exported space (even namespaced) is a big deal, so,
definitely no from my side.

-- 
With Best Regards,
Andy Shevchenko