linux-kernel - Re: [PATCH] drm/radeon: Include swiotlb.h if SWIOTLB configured.

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Date:	Mon, 13 Aug 2012 16:04:56 +0800
From:	Huacai Chen <chenhuacai@...il.com>
To:	Paul Menzel <paulepanter@...rs.sourceforge.net>
Cc:	Michel Dänzer <michel@...nzer.net>,
	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	Fuxin Zhang <zhangfx@...ote.com>,
	Huacai Chen <chenhc@...ote.com>,
	Hongliang Tao <taohl@...ote.com>, Hua Yan <yanh@...ote.com>
Subject: Re: [PATCH] drm/radeon: Include swiotlb.h if SWIOTLB configured.

On Mon, Aug 13, 2012 at 3:50 PM, Paul Menzel
<paulepanter@...rs.sourceforge.net> wrote:
> Dear Huacai,
>
>
> Am Montag, den 13.08.2012, 15:16 +0800 schrieb Huacai Chen:
>> On Mon, Aug 13, 2012 at 3:00 PM, Paul Menzel wrote:
>
>> > thanks for your patch.
>> >
>> > Firstly, is Chen your first or last name? If it is your first name, your
>> > From address should be switched.
>> Chen is may last name.
>
> I am sorry then.
>
>> > Am Montag, den 13.08.2012, 10:09 +0800 schrieb Huacai Chen:
>> >> When SWIOTLB is configured, if without this patch kernel compilation
>> >> fails.
>> >
>> > Secondly, could you please always paste part of the error message into
>> > the commit message so that people hitting this problem and searching for
>> > it on the WWW have a higher chance finding your patch.
>> >
>> OK, I'll paste error message.
>>
>> > Thirdly, do you know why this was not caught beforehand and compilation
>> > worked before?
>> Maybe radeon is mostly used on X86 and swiotlb.h is included
>> indirectly on X86 platform. This patch is split from my MIPS patchset,
>> on MIPS machines compilation always failed.
>
> Ah, I thought your patches had already been submitted.
My MIPS patchset is under review (not accepted now), I think this drm
patch is important and should be accept first, so sent it
independently.

>
>> >> Signed-off-by: Huacai Chen <chenhc@...ote.com>
>> >
>> > Lastly, the addresses in your From line and Signed-off-by line disagree.
>> > You can easily fix that, by adding
>> My patch is generated by git format-patch and there is surely a From
>> line in the beginning (from chenhc@...ote.com),
>
> It should be `From: Huacai Chen <chenhc@...ote.com>`.
Yes, git format-patch generate `From: Huacai Chen <chenhc@...ote.com>`

>
>> but the mail is sent out by gmail, so I don't know how to make From
>> line and Signed-off-by agree.
>
> Do you copy the content of the file created by `git format-patch` into
> the Gmail Web compositor?
>
> If yes, just do not delete the `From` *and* `Date` lines from the
> beginning as for example Alex Deucher is doing [1].
No, I use git send-email to send the patch but use gmail's server
(mail server of lemote.com is too weak). The original patch is begin
with:
-----
>From 70e1e058da3d39c52b7dba3e8fa754e7ed41828c Mon Sep 17 00:00:00 2001
From: Huacai Chen <chenhc@...ote.com>
Date: Thu, 2 Aug 2012 17:02:59 +0800
Subject: [PATCH] drm/radeon: Include swiotlb.h if SWIOTLB configured.

When SWIOTLB is configured, if without this patch kernel compilation
fails with error messages:
----
Do you means I need to copy the From line and paste it after the Subject line?

>
> […]
>
>
> Thanks,
>
> Paul
>
>
> [1] http://lists.freedesktop.org/archives/dri-devel/2012-July/025200.html
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