Re: [PATCH v3 1/7] mfd: syscon: Add reference counting and device managed support

[Lee Jones <lee@kernel.org>]

On Thu, 11 Jul 2024, Herve Codina wrote:

> Hi Markus,
> 
> On Thu, 11 Jul 2024 18:09:26 +0200
> Markus Elfring <Markus.Elfring@web.de> wrote:
> 
> > …
> > > +++ b/drivers/mfd/syscon.c  
> > …
> > > +static struct syscon *syscon_from_regmap(struct regmap *regmap)  
> > +{
> > > +	struct syscon *entry, *syscon = NULL;
> > > +
> > > +	spin_lock(&syscon_list_slock);
> > > +
> > > +	list_for_each_entry(entry, &syscon_list, list)  
> > …
> > > +	spin_unlock(&syscon_list_slock);
> > > +
> > > +	return syscon;
> > > +}  
> > …
> > 
> > Under which circumstances would you become interested to apply a statement
> > like “guard(spinlock)(&syscon_list_slock);”?
> > https://elixir.bootlin.com/linux/v6.10-rc7/source/include/linux/spinlock.h#L561
> > 
> 
> I used the spin_{lock,unlock}() pattern call already present in syscon.c.
> Of course, I can add a new patch in this series converting syscon.c to
> the guard() family and use guard() in my introduced lock/unlock.
> 
> Lee, any opinion ?

I'm intentionally leaving this one for Arnd.

-- 
Lee Jones [李琼斯]