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Date:   Mon, 1 Nov 2021 16:08:08 +0200
From:   Andy Shevchenko <andriy.shevchenko@intel.com>
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     Chen Yu <yu.c.chen@intel.com>, linux-acpi@vger.kernel.org,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        Ard Biesheuvel <ardb@kernel.org>, Len Brown <lenb@kernel.org>,
        Ashok Raj <ashok.raj@intel.com>,
        Mike Rapoport <rppt@kernel.org>,
        Aubrey Li <aubrey.li@intel.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v7 2/4] drivers/acpi: Introduce Platform Firmware Runtime
 Update device driver
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On Mon, Nov 01, 2021 at 02:16:41PM +0100, Greg Kroah-Hartman wrote:
> On Mon, Nov 01, 2021 at 09:14:34PM +0800, Chen Yu wrote:
> > On Mon, Nov 01, 2021 at 01:21:36PM +0200, Andy Shevchenko wrote:

...

> > Ok, I'll switch to global variables in next version.
> 
> Wait, no, why?

But why should we have a duplication of basically static data?

> Keep them per-device unless you can somehow be
> guaranteed there will never be more than one of these ACPI devices in a
> system.

I guess you missed my point. These definitions are _always_ the same.
It does not matter how many devices in the system.

Chen, is my perception correct?
If no, then do what Greg says.

> It's simpler this way, no need to worry about global state at
> all.

Actually I have no idea why we even have strings in  and not raw buffers.
Moreover, I haven't got why even we have them in uAPI.

-- 
With Best Regards,
Andy Shevchenko