linux-kernel - Re: [PATCH V5 02/10] perf/amd/iommu: Consolidate and move perf_event_amd

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Date:	Mon, 14 Mar 2016 12:26:00 +0700
From:	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	<joro@...tes.org>, <bp@...en8.de>, <mingo@...hat.com>,
	<acme@...nel.org>, <andihartmann@...enet.de>, <vw@...mu.org>,
	<labbott@...hat.com>, <linux-kernel@...r.kernel.org>,
	<iommu@...ts.linux-foundation.org>
Subject: Re: [PATCH V5 02/10] perf/amd/iommu: Consolidate and move
 perf_event_amd_iommu header

Hi,

On 03/12/2016 08:22 PM, Peter Zijlstra wrote:
> On Tue, Feb 23, 2016 at 08:12:36AM -0600, Suravee Suthikulpanit wrote:
>> From: Suravee Suthikulpanit <suravee.suthikulpanit@....com>
>>
>> First, this patch move arch/x86/events/amd/iommu.h to
>> arch/x86/include/asm/perf/amd/iommu.h so that we easily include
>> it in both perf-amd-iommu and amd-iommu drivers.
>>
>> Then, we consolidate declaration of AMD IOMMU performance counter
>> APIs into one file.
>
> These seem two independent thingies; should this therefore not be 2
> patches?
>
>> Reviewed-by: Joerg Roedel <jroedel@...e.de>
>> Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
>> ---
>>   arch/x86/events/amd/iommu.c           |  2 +-
>>   arch/x86/events/amd/iommu.h           | 40 ---------------------------------
>>   arch/x86/include/asm/perf/amd/iommu.h | 42 +++++++++++++++++++++++++++++++++++
>
> That seems somewhat excessive. Not only do you create
> arch/x86/include/asm/perf/ you then put another directory on top of
> that.
>

The original header files (arch/x86/events/amd/iommu.h and 
drivers/iommu/amd_iommu_proto.h) has duplicate function declarations. 
So, with the new header file being in the 
arch/x86/include/asm/perf/amd/iommu.h, we can just have one function 
declaration.

So, you just want to separate the file moving part and the part that 
removes of the duplication?

Thanks,
Suravee