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Date: Thu, 25 Aug 2022 23:42:53 +0100
From: Paul Cercueil <paul@...pouillou.net>
To: "Rafael J. Wysocki" <rafael@...nel.org>
Cc: Lee Jones <lee.jones@...aro.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Jonathan Cameron <jic23@...nel.org>,
linux-pm <linux-pm@...r.kernel.org>
Subject: Re: [PATCH v2 01/30] pm: Improve EXPORT_*_DEV_PM_OPS macros
Hi Rafael,
Le mar., août 23 2022 at 19:47:57 +0200, Rafael J. Wysocki
<rafael@...nel.org> a écrit :
> On Mon, Aug 8, 2022 at 7:41 PM Paul Cercueil <paul@...pouillou.net>
> wrote:
>>
>> Update the _EXPORT_DEV_PM_OPS() internal macro. It was not used
>> anywhere
>> outside pm.h and pm_runtime.h, so it is safe to update it.
>>
>> Before, this macro would take a few parameters to be used as sleep
>> and
>> runtime callbacks. This made it unsuitable to use with different
>> callbacks, for instance the "noirq" ones.
>>
>> It is now semantically different: instead of creating a
>> conditionally
>> exported dev_pm_ops structure, it only contains part of the
>> definition.
>>
>> This macro should however never be used directly (hence the trailing
>> underscore). Instead, the following four macros are provided:
>> - EXPORT_DEV_PM_OPS(name)
>> - EXPORT_GPL_DEV_PM_OPS(name)
>> - EXPORT_NS_DEV_PM_OPS(name, ns)
>> - EXPORT_NS_GPL_DEV_PM_OPS(name, ns)
>>
>> For instance, it is now possible to conditionally export noirq
>> suspend/resume PM functions like this:
>>
>> EXPORT_GPL_DEV_PM_OPS(foo_pm_ops) = {
>> NOIRQ_SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn)
>> };
>>
>> The existing helper macros EXPORT_*_SIMPLE_DEV_PM_OPS() and
>> EXPORT_*_RUNTIME_DEV_PM_OPS() have been updated to use these new
>> macros.
>>
>> Signed-off-by: Paul Cercueil <paul@...pouillou.net>
>
> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>
> or please let me know if you need me to pick up this one.
Could you pick this one up then, and make a branch for Jonathan?
Cheers,
-Paul
>
>> ---
>> Cc: Jonathan Cameron <jic23@...nel.org>
>> Cc: Rafael J. Wysocki <rafael@...nel.org>
>> Cc: linux-pm <linux-pm@...r.kernel.org>
>>
>> include/linux/pm.h | 37
>> +++++++++++++++++++++++--------------
>> include/linux/pm_runtime.h | 20 ++++++++++++--------
>> 2 files changed, 35 insertions(+), 22 deletions(-)
>>
>> diff --git a/include/linux/pm.h b/include/linux/pm.h
>> index 871c9c49ec9d..93cd34f00822 100644
>> --- a/include/linux/pm.h
>> +++ b/include/linux/pm.h
>> @@ -375,19 +375,20 @@ const struct dev_pm_ops name = { \
>> }
>>
>> #ifdef CONFIG_PM
>> -#define _EXPORT_DEV_PM_OPS(name, suspend_fn, resume_fn,
>> runtime_suspend_fn, \
>> - runtime_resume_fn, idle_fn, sec, ns)
>> \
>> - _DEFINE_DEV_PM_OPS(name, suspend_fn, resume_fn,
>> runtime_suspend_fn, \
>> - runtime_resume_fn, idle_fn); \
>> - __EXPORT_SYMBOL(name, sec, ns)
>> +#define _EXPORT_DEV_PM_OPS(name, sec, ns)
>> \
>> + const struct dev_pm_ops name;
>> \
>> + __EXPORT_SYMBOL(name, sec, ns);
>> \
>> + const struct dev_pm_ops name
>> #else
>> -#define _EXPORT_DEV_PM_OPS(name, suspend_fn, resume_fn,
>> runtime_suspend_fn, \
>> - runtime_resume_fn, idle_fn, sec, ns) \
>> -static __maybe_unused _DEFINE_DEV_PM_OPS(__static_##name,
>> suspend_fn, \
>> - resume_fn,
>> runtime_suspend_fn, \
>> - runtime_resume_fn, idle_fn)
>> +#define _EXPORT_DEV_PM_OPS(name, sec, ns)
>> \
>> + static __maybe_unused const struct dev_pm_ops
>> __static_##name
>> #endif
>>
>> +#define EXPORT_DEV_PM_OPS(name) _EXPORT_DEV_PM_OPS(name, "", "")
>> +#define EXPORT_GPL_DEV_PM_OPS(name) _EXPORT_DEV_PM_OPS(name,
>> "_gpl", "")
>> +#define EXPORT_NS_DEV_PM_OPS(name, ns) _EXPORT_DEV_PM_OPS(name,
>> "", #ns)
>> +#define EXPORT_NS_GPL_DEV_PM_OPS(name, ns)
>> _EXPORT_DEV_PM_OPS(name, "_gpl", #ns)
>> +
>> /*
>> * Use this if you want to use the same suspend and resume
>> callbacks for suspend
>> * to RAM and hibernation.
>> @@ -399,13 +400,21 @@ static __maybe_unused
>> _DEFINE_DEV_PM_OPS(__static_##name, suspend_fn, \
>> _DEFINE_DEV_PM_OPS(name, suspend_fn, resume_fn, NULL, NULL,
>> NULL)
>>
>> #define EXPORT_SIMPLE_DEV_PM_OPS(name, suspend_fn, resume_fn) \
>> - _EXPORT_DEV_PM_OPS(name, suspend_fn, resume_fn, NULL, NULL,
>> NULL, "", "")
>> + EXPORT_DEV_PM_OPS(name) = { \
>> + SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn) \
>> + }
>> #define EXPORT_GPL_SIMPLE_DEV_PM_OPS(name, suspend_fn, resume_fn) \
>> - _EXPORT_DEV_PM_OPS(name, suspend_fn, resume_fn, NULL, NULL,
>> NULL, "_gpl", "")
>> + EXPORT_GPL_DEV_PM_OPS(name) = { \
>> + SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn) \
>> + }
>> #define EXPORT_NS_SIMPLE_DEV_PM_OPS(name, suspend_fn, resume_fn,
>> ns) \
>> - _EXPORT_DEV_PM_OPS(name, suspend_fn, resume_fn, NULL, NULL,
>> NULL, "", #ns)
>> + EXPORT_NS_DEV_PM_OPS(name, ns) = { \
>> + SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn) \
>> + }
>> #define EXPORT_NS_GPL_SIMPLE_DEV_PM_OPS(name, suspend_fn,
>> resume_fn, ns) \
>> - _EXPORT_DEV_PM_OPS(name, suspend_fn, resume_fn, NULL, NULL,
>> NULL, "_gpl", #ns)
>> + EXPORT_NS_GPL_DEV_PM_OPS(name, ns) = { \
>> + SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn) \
>> + }
>>
>> /* Deprecated. Use DEFINE_SIMPLE_DEV_PM_OPS() instead. */
>> #define SIMPLE_DEV_PM_OPS(name, suspend_fn, resume_fn) \
>> diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h
>> index 9e4d056967c6..ba2077d9e366 100644
>> --- a/include/linux/pm_runtime.h
>> +++ b/include/linux/pm_runtime.h
>> @@ -40,17 +40,21 @@
>> 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, "", "")
>> + EXPORT_DEV_PM_OPS(name) = { \
>> + RUNTIME_PM_OPS(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",
>> "")
>> + EXPORT_GPL_DEV_PM_OPS(name) = { \
>> + RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \
>> + }
>> #define EXPORT_NS_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn,
>> idle_fn, ns) \
>> - _EXPORT_DEV_PM_OPS(name, pm_runtime_force_suspend,
>> pm_runtime_force_resume, \
>> - suspend_fn, resume_fn, idle_fn, "", #ns)
>> + EXPORT_NS_DEV_PM_OPS(name, ns) = { \
>> + RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \
>> + }
>> #define EXPORT_NS_GPL_RUNTIME_DEV_PM_OPS(name, suspend_fn,
>> resume_fn, idle_fn, ns) \
>> - _EXPORT_DEV_PM_OPS(name, pm_runtime_force_suspend,
>> pm_runtime_force_resume, \
>> - suspend_fn, resume_fn, idle_fn, "_gpl",
>> #ns)
>> + EXPORT_NS_GPL_DEV_PM_OPS(name, ns) = { \
>> + RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \
>> + }
>>
>> #ifdef CONFIG_PM
>> extern struct workqueue_struct *pm_wq;
>> --
>> 2.35.1
>>
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