linux-kernel - Re: [PATCH v7 2/4] drivers/acpi: Introduce Platform Firmware Runtime Update device driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <YX/0yCUlGM35vEXS@smile.fi.intel.com>
Date:   Mon, 1 Nov 2021 16:08:08 +0200
From:   Andy Shevchenko <andriy.shevchenko@...el.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Chen Yu <yu.c.chen@...el.com>, linux-acpi@...r.kernel.org,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Ard Biesheuvel <ardb@...nel.org>, Len Brown <lenb@...nel.org>,
        Ashok Raj <ashok.raj@...el.com>,
        Mike Rapoport <rppt@...nel.org>,
        Aubrey Li <aubrey.li@...el.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 2/4] drivers/acpi: Introduce Platform Firmware Runtime
 Update device driver

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