linux-kernel - Re: [Linaro-acpi] [RFC PATCH 3/4] arm64, acpi, pci: Add arch specific functions for mmconfig driver.

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Date:	Fri, 07 Nov 2014 15:39:32 +0100
From:	Tomasz Nowicki <tomasz.nowicki@...aro.org>
To:	Arnd Bergmann <arnd@...db.de>, linaro-acpi@...ts.linaro.org
CC:	catalin.marinas@....com, will.deacon@....com, bhelgaas@...gle.com,
	Liviu.Dudau@....com, tglx@...utronix.de, mingo@...hat.com,
	hpa@...or.com, rjw@...ysocki.net, linux-pci@...r.kernel.org,
	x86@...nel.org, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [Linaro-acpi] [RFC PATCH 3/4] arm64, acpi, pci: Add arch specific
 functions for mmconfig driver.

On 07.11.2014 15:12, Arnd Bergmann wrote:
> On Friday 07 November 2014 14:27:55 Tomasz Nowicki wrote:
>> These calls allow to map/unmap PCI config space ranges (which are specified in
>> MMCFG ACPI table).
>>
>> Signed-off-by: Tomasz Nowicki <tomasz.nowicki@...aro.org>
>>
>
> Nothing in this patch looks arm64 specific, and most of it looks like a
> copy of the x86 code.

Yes, most of the logic was borrowed from mmconfig_64.c file, 
mmconfig_32.c looks differently, though. It is not simple to merge them 
both. IMO, we have two choices:
1. Refactor and move mmconfig_64.c out of x86 to e.g. drivers/acpi/ and 
let it be default.
2. Stay with solution presented in this patch.
3. Thoughts ?

Regards,
Tomasz
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