linux-kernel - Re: [PATCH] include/linux/amd-iommu.h: Move to arch/x86/include/asm

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Message-ID: <56819E3B.20506@emindsoft.com.cn>
Date:	Tue, 29 Dec 2015 04:40:27 +0800
From:	Chen Gang <chengang@...ndsoft.com.cn>
To:	Joerg Roedel <joro@...tes.org>
CC:	akpm@...ux-foundation.org, oded.gabbay@...il.com, airlied@...ux.ie,
	joe@...ches.com, jslaby@...e.com, gregkh@...uxfoundation.org,
	davem@...emloft.net, mchehab@....samsung.com,
	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH] include/linux/amd-iommu.h: Move to arch/x86/include/asm

On 12/28/15 23:51, Joerg Roedel wrote:
> On Sat, Dec 26, 2015 at 09:26:32PM +0800, chengang@...ndsoft.com.cn wrote:
>>
>> It is architecture specific mechanism header, not generic header, so
>> move it to arch/x86/include/asm.
> 
> There might be future non-x86 hardware which also has an amd iommu, so
> the header file should stay where it is for now.
>

For me, amd-iommu.h is architecture specific, for this kind of headers,
if it is used by most of archs, it will be in "include/asm-generic". If
it is used by several archs, it will be in "arch/*/include/asm/".

So for me, at present, it is only used by x86, so is move to "arch/x86/
include/asm/"; if another archs want it, they can copy one.  If quite a
few archs (e.g. > 3 archs) need it, move it to "include/asm-generic".


Thanks.
-- 
Chen Gang (陈刚)

Open, share, and attitude like air, water, and life which God blessed
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