linux-kernel - Re: [PATCH v2 04/10] pinctrl: intel: Switch to use DEFINE_NOIRQ_DEV_PM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAHp75Vcjq9=Q2_fsGJ9oCw=WYR3p3ot_cNLiDJV93psNcXXHLw@mail.gmail.com>
Date:   Mon, 17 Jul 2023 22:33:47 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     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>,
        Thierry Reding <thierry.reding@...il.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 04/10] pinctrl: intel: Switch to use
 DEFINE_NOIRQ_DEV_PM_OPS() helper

On Mon, Jul 17, 2023 at 10:02 PM Paul Cercueil <paul@...pouillou.net> wrote:
> Le lundi 17 juillet 2023 à 20:28 +0300, Andy Shevchenko a écrit :

...

> Unrelated change.

OK.

...

> So the correct way to update this driver would be to have a
> conditionally-exported dev_pm_ops structure:
>
> EXPORT_GPL_DEV_PM_OPS(intel_pinctrl_pm_ops) = {
>     NOIRQ_SYSTEM_SLEEP_PM_OPS(intel_pinctrl_suspend_noirq,
> intel_pinctrl_resume_noirq),
> };

This looks ugly. I didn't know that EXPORT*PM_OPS designed that way,
but it seems pm.h in such case needs EXPORT for NOIRQ case as well.

> Then your two callbacks can be "static" and without #ifdef guards.
>
> The resulting "intel_pinctrl_pm_ops" can be marked as "extern" in the
> pinctrl-intel.h without any guards, as long as it is only referenced
> with the pm_ptr() macro.

I'm not sure I got this. Currently drivers do not have any guards.
Moreover, the correct one for noirq is pm_sleep_ptr(), isn't it?

-- 
With Best Regards,
Andy Shevchenko