linux-kernel - Re: [PATCH v1 1/3] pm: Introduce DEFINE_NOIRQ_DEV_PM

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Date:   Fri, 30 Dec 2022 21:23:15 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Paul Cercueil <paul@...pouillou.net>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, Andy Shevchenko <andy@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>
Subject: Re: [PATCH v1 1/3] pm: Introduce DEFINE_NOIRQ_DEV_PM_OPS() helper

On Fri, Dec 30, 2022 at 8:43 PM Rafael J. Wysocki <rafael@...nel.org> wrote:
> On Thu, Dec 29, 2022 at 1:59 PM Andy Shevchenko
> <andriy.shevchenko@...ux.intel.com> wrote:
> >
> > There are a few drivers and might be more in the future that
> > open code the functionality of proposed DEFINE_NOIRQ_DEV_PM_OPS()
> > helper. From now on they may switch to the new helper and save
> > a few lines of code.

...

> > +#define DEFINE_NOIRQ_DEV_PM_OPS(name, suspend_fn, resume_fn) \
> > +const struct dev_pm_ops name = { \
> > +       NOIRQ_SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn) \
> > +}
>
> There is NOIRQ_SYSTEM_SLEEP_PM_OPS(), so why is the above needed in addition?

It defines the constant object of struct dev_pm_ops type with this
included and as the commit message says, allows to save a few lines of
code in each of the drivers that uses NOIRQ_SYSTEM_SLEEP_PM_OPS()
currently. The examples on how to convert are provided in the patches
2 and 3.

-- 
With Best Regards,
Andy Shevchenko