linux-kernel - Re: [PATCH RFCv2 1/4] ACPI: NUMA: export pxm_to

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Message-ID: <CAJZ5v0ionYbXse8++6c80FXajVKYLSYD7hC5RntygKJ9+PQpYg@mail.gmail.com>
Date:   Thu, 24 May 2018 11:01:02 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     David Hildenbrand <david@...hat.com>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Subject: Re: [PATCH RFCv2 1/4] ACPI: NUMA: export pxm_to_node

On Thu, May 24, 2018 at 10:54 AM, David Hildenbrand <david@...hat.com> wrote:
> On 24.05.2018 10:47, Rafael J. Wysocki wrote:
>> On Thu, May 24, 2018 at 10:33 AM, David Hildenbrand <david@...hat.com> wrote:
>>> On 24.05.2018 10:12, Rafael J. Wysocki wrote:
>>>> On Wed, May 23, 2018 at 8:24 PM, David Hildenbrand <david@...hat.com> wrote:
>>>>> Will be needed by paravirtualized memory devices.
>>>>
>>>> That's a little information.
>>>>
>>>> It would be good to see the entire series at least.
>>>
>>> It's part of this series (guess you only received the cover letter and
>>> this patch). Here a link to the patch using it:
>>>
>>> https://lkml.org/lkml/2018/5/23/803
>>
>> OK, thanks!
>>
>> It looks like you have a reason to use it in there, but please note
>> that CONFIG_ACPI_NUMA depends on CONFIG_NUMA, so you don't need to use
>> the latter directly in the #ifdef.  Also wouldn't IS_ENABLED() work
>> there?
>
> Thanks for the tip on CONFIG_ACPI_NUMA. Wouldn't IS_ENABLED() require to
> have a dummy implementation of pxm_to_node() in case drivers/acpi/numa.c
> is not compiled?

Yes, it would.

But since you want export it, you can very well add one, can't you?
I'd even say that it would be prudent to do so.