Re: [PATCH 2/8] PM: core: Add NS varients of EXPORT[_GPL]_SIMPLE_DEV_PM_OPS and runtime pm equiv

[Jonathan Cameron <jic23@kernel.org>]

On Mon, 21 Feb 2022 20:37:57 +0100
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com> wrote:

Hi Rafael,
> CC: linux-pm

Oops. Stupid omission on my part, sorry about that!

> 
> On 2/20/2022 7:15 PM, Jonathan Cameron wrote:
> > From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> >
> > As more drivers start to use namespaces, we need to have varients of these
> > useful macros that allow the export to be in a particular namespace.
> >
> > Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> > Cc: Paul Cercueil <paul@crapouillou.net>
> > Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>  
> 
> I'd rather route this through linux-pm unless you have dependent changes.

Ok. 

The kxsd9 patch (4) is dependent on other changes queued for
the merge window in IIO. If we want to do it through linux-pm I'd
love it if we can manage to get the ground work in for the coming merge window.

So options are:

1) This patch alone via linux-pm and I queue the users up for next cycle
   Fine by me but always awkward to have infrastructure with no users.
2) First 3 patches via linux-pm so we have a user (scd30) in a low churn
   driver and I'll queue the rest for 5.19.  Fine by me as well.
   That goes on cleanly on 5.17-rc1 and there is nothing else in my review
   queue touching that driver.

I'm also interested to hear your view on the discussion going on in reply
to the cover letter. Specifically Paul suggested we 'only' have the
namespaced versions of these macros.

Thanks,

Jonathan


> 
> 
> > ---
> >   include/linux/pm.h         | 14 +++++++++-----
> >   include/linux/pm_runtime.h | 10 ++++++++--
> >   2 files changed, 17 insertions(+), 7 deletions(-)
> >
> > diff --git a/include/linux/pm.h b/include/linux/pm.h
> > index f7d2be686359..112b8125d4be 100644
> > --- a/include/linux/pm.h
> > +++ b/include/linux/pm.h
> > @@ -368,13 +368,13 @@ 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) \
> > +			   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)
> > +	__EXPORT_SYMBOL(name, sec, ns)
> >   #else
> >   #define _EXPORT_DEV_PM_OPS(name, suspend_fn, resume_fn, runtime_suspend_fn, \
> > -			   runtime_resume_fn, idle_fn, sec) \
> > +			   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)
> > @@ -391,9 +391,13 @@ 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, suspend_fn, resume_fn, NULL, NULL, NULL, "", "")
> >   #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_DEV_PM_OPS(name, suspend_fn, resume_fn, NULL, NULL, NULL, "_gpl", "")
> > +#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)
> > +#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)
> >   
> >   /* 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 9f09601c465a..6a8b9551ecad 100644
> > --- a/include/linux/pm_runtime.h
> > +++ b/include/linux/pm_runtime.h
> > @@ -41,10 +41,16 @@
> >   
> >   #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, "")
> > +			   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")
> > +			   suspend_fn, resume_fn, idle_fn, "_gpl", "")
> > +#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)
> > +#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)
> >   
> >   #ifdef CONFIG_PM
> >   extern struct workqueue_struct *pm_wq;  
> 
>