Re: [PATCH 01/11] ARM64 / PCI: introduce struct pci_controller for ACPI
From: Ganapatrao Kulkarni
Date: Mon Sep 07 2015 - 00:14:29 EST
On Wed, May 27, 2015 at 1:51 PM, Hanjun Guo <hanjun.guo@xxxxxxxxxx> wrote:
> Hi Liviu,
> On 2015å05æ27æ 01:20, Jiang Liu wrote:
>> On 2015/5/27 0:58, Liviu Dudau wrote:
>>> On Tue, May 26, 2015 at 01:49:14PM +0100, Hanjun Guo wrote:
>>>> ARM64 ACPI based PCI host bridge init needs a arch dependent
>>>> struct pci_controller to accommodate common PCI host bridge
>>>> code which is introduced later, or it will lead to compile
>>>> errors on ARM64.
>>> Hi Hanjun,
>>> Two questions: why don't you introduce this patch next to the
>>> one that is going to make use of it (or even merge it there)?
> this is because of this patch is needed by Jiang Liu's patch set
> to fix the compile error on ARM64, I'd rather do that, but It's
> better to let Jiang Liu's patch goes in, and then this one, that's
> why I prepared a single patch for the struct. (I mentioned it
> in the cover letter)
>>> Second, why is the whole struct pci_controller not surrounded
>>> by #ifdef CONFIG_ACPI as you are implying that this is needed
>>> only for ACPI?
> I hope it can be reused, since the NUMA node and segment (domain)
> is both needed for DT and ACPI, if it's not the case foe now, I
> can surrounded them all by #ifdef CONFIG_ACPI.
we can make use of this structure to hold pci to numa node
can you please pull node member out of CONFIG_ACPI ifdef.
or you can put only acpi_device under ifdef.
>>> Btw, looking through the whole series I'm not (yet) convinced
>>> that this is needed at all.
>> Hi Liviu,
>> This structure is required by the requested patch set
>> at http://patchwork.ozlabs.org/patch/472249/, which consolidates
>> the common code to support PCI host bridge into ACPI core.
> Jiang, thanks for the explanation :)
> linux-arm-kernel mailing list
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