linux-kernel - Re: [PATCH v3 5/6] PM: runtime: Add EXPORT[_GPL]_RUNTIME_DEV_PM

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Date:   Mon, 10 Jan 2022 13:19:16 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     "Rafael J . Wysocki" <rafael@...nel.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Arnd Bergmann <arnd@...db.de>, Len Brown <len.brown@...el.com>,
        Pavel Machek <pavel@....cz>, list@...ndingux.net,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mips@...r.kernel.org, linux-mmc@...r.kernel.org,
        linux-pm@...r.kernel.org,
        Jonathan Cameron <jonathan.cameron@...wei.com>
Subject: Re: [PATCH v3 5/6] PM: runtime: Add EXPORT[_GPL]_RUNTIME_DEV_PM_OPS macros

On Fri, 7 Jan 2022 at 19:17, Paul Cercueil <paul@...pouillou.net> wrote:
>
> Similar to EXPORT[_GPL]_SIMPLE_DEV_PM_OPS, but for users with runtime-PM
> suspend/resume callbacks.
>
> Signed-off-by: Paul Cercueil <paul@...pouillou.net>
> Acked-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>

Kind regards
Uffe

> ---
>
> Notes:
>     v2: No change
>     v3: Add comment about the necesity to use the new export macro when
>         the dev_pm_ops has to be exported
>
>  include/linux/pm_runtime.h | 10 ++++++++++
>  1 file changed, 10 insertions(+)
>
> diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h
> index 4af454d29281..9f09601c465a 100644
> --- a/include/linux/pm_runtime.h
> +++ b/include/linux/pm_runtime.h
> @@ -30,12 +30,22 @@
>   * macro, which uses the provided callbacks for both runtime PM and system
>   * sleep, while DEFINE_RUNTIME_DEV_PM_OPS() uses pm_runtime_force_suspend()
>   * and pm_runtime_force_resume() for its system sleep callbacks.
> + *
> + * If the underlying dev_pm_ops struct symbol has to be exported, use
> + * EXPORT_RUNTIME_DEV_PM_OPS() or EXPORT_GPL_RUNTIME_DEV_PM_OPS() instead.
>   */
>  #define DEFINE_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn) \
>         _DEFINE_DEV_PM_OPS(name, pm_runtime_force_suspend, \
>                            pm_runtime_force_resume, suspend_fn, \
>                            resume_fn, idle_fn)
>
> +#define EXPORT_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn) \
> +       _EXPORT_DEV_PM_OPS(name, pm_runtime_force_suspend, pm_runtime_force_resume, \
> +                          suspend_fn, resume_fn, idle_fn, "")
> +#define EXPORT_GPL_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn) \
> +       _EXPORT_DEV_PM_OPS(name, pm_runtime_force_suspend, pm_runtime_force_resume, \
> +                          suspend_fn, resume_fn, idle_fn, "_gpl")
> +
>  #ifdef CONFIG_PM
>  extern struct workqueue_struct *pm_wq;
>
> --
> 2.34.1
>