linux-kernel - Re: [PATCH v2 3/5] ACPI / bus: Switch to use new generic UUID API

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Message-ID: <CAJZ5v0jv_RKwiDLD_bDOxZfe_mZnaxfGkcwLaB8WvWncDvx6PA@mail.gmail.com>
Date:   Mon, 5 Jun 2017 22:37:41 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Christoph Hellwig <hch@....de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Borislav Petkov <bp@...e.de>,
        intel-gfx <intel-gfx@...ts.freedesktop.org>
Subject: Re: [PATCH v2 3/5] ACPI / bus: Switch to use new generic UUID API

On Mon, Jun 5, 2017 at 6:20 PM, Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
> On Mon, 2017-06-05 at 18:03 +0200, Christoph Hellwig wrote:
>> > +   in_params[0].buffer.pointer     = (u8 *)&guid;
>>
>> Any idea why the pointer is defined as a u8 * in union acpi_object
>> instead of a void?
>
> I guess this question to Rafael.

That data type is defined in upstream ACPICA and the reason why it is
defined the way it is has something to do with history I suppose.

Thanks,
Rafael