linux-kernel - Re: [PATCH v2 1/2] x86/acpi: add retrieval function for rsdp address

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Date:   Fri, 26 Jan 2018 19:21:13 +0100
From:   Juergen Gross <jgross@...e.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        xen-devel@...ts.xenproject.org, Len Brown <lenb@...nel.org>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Ingo Molnar <mingo@...hat.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        stable@...r.kernel.org
Subject: Re: [PATCH v2 1/2] x86/acpi: add retrieval function for rsdp address

On 26/01/18 19:08, Andy Shevchenko wrote:
> On Thu, Jan 25, 2018 at 4:36 PM, Juergen Gross <jgross@...e.com> wrote:
>> Add a function to get the address of the RSDP table. Per default use a
>> __weak annotated function being a nop.
> 
> The problem with weak functions that we can't have more than one
> implementation per kernel while we would like to built several code
> paths.
> 
> I have stumbled on the similar stuff and realize that.
> 
> Perhaps, one of the solution is to have an additional struct under
> x86_init to alternate ACPI related stuff.

I think we can go that route when another user of that interface is
appearing.


Juergen