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

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On Wed, Jan 31, 2018 at 4:43 PM, Andy Shevchenko
<andy.shevchenko@xxxxxxxxx> wrote:
> On Mon, Jan 29, 2018 at 5:02 AM, Rafael J. Wysocki <rafael@xxxxxxxxxx> wrote:
>> On Sun, Jan 28, 2018 at 4:04 PM, Andy Shevchenko
>> <andy.shevchenko@xxxxxxxxx> wrote:
>>> On Fri, Jan 26, 2018 at 8:21 PM, Juergen Gross <jgross@xxxxxxxx> wrote:
>>>> On 26/01/18 19:08, Andy Shevchenko wrote:
>>>>> On Thu, Jan 25, 2018 at 4:36 PM, Juergen Gross <jgross@xxxxxxxx> wrote:
>
>>>>> 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.
>>>
>>> Why not to establish the struct? At least this route I would like to
>>> go with [1].
>>>
>>> [1]: https://lkml.org/lkml/2018/1/17/834
>>
>> Maybe I'm a bit slow today, but care to explain what exactly you mean?
>
> Instead of declaring function as __weak, establish a new struct for
> ACPI related stubs and incorporate it into x86_init.
>
> That is my proposal. I think I would go this way in my case where I
> need to treat differently ACPI HW reduced initialization of legacy
> devices.

IOW you'd like to have a set of ACPI init callbacks that could be
defined by an arch, right?
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