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Re: [PATCH] mips: Add dma_mmap_coherent()

To: Takashi Iwai <>
Subject: Re: [PATCH] mips: Add dma_mmap_coherent()
From: Joel Soete <>
Date: Sat, 23 Aug 2008 19:39:58 +0000
Cc: "James.Bottomley" <>, linux-mips <>, ralf <>, linux-parisc <>
In-reply-to: <>
Original-recipient: rfc822;
References: <K6047O$> <>
User-agent: Mozilla-Thunderbird (X11/20080724)
Hello Takashi,

Takashi Iwai wrote:
At Fri, 22 Aug 2008 13:04:36 +0100,
Joel Soete wrote:
Hello Takashi et al.,
I build and boot successfully kernel 32bit including your patch on 2 systems
(a b2k using sba and a d380 using ccio).

Thanks for testing!

welcome ;-)

I just noticed that the above code is ~ the same; otoh there is also a
iommu-helpers.h containing also common code to those 2 drivers. So may be for
easiest maintenance, could you merge and move this code in this 'helper' as
--- ./drivers/parisc/iommu-helpers.h.Orig       2008-08-01 12:57:22.000000000 
+++ ./drivers/parisc/iommu-helpers.h    2008-08-22 08:07:26.000000000 +0000

That sounds like a good idea.

One concern is to define a non-inline function in *.h.  But,

Yes (I thought too but didn't find any other good reason then avoiding useless 
duplicate code)

iommu-helper.h is included only by these two drivers, so there is no
problem as now, although a comment would be more helpful.

Yes I hope it will be enough for this stuff to be accepted ;-)

diff --git a/include/asm-parisc/dma-mapping.h b/include/asm-parisc/dma-mapping.h
index 53af696..5b357b3 100644
--- a/include/asm-parisc/dma-mapping.h
+++ b/include/asm-parisc/dma-mapping.h
The small issue encountered: against latest Kyle git tree (dated 2008-07-29)
this file was moved in arch/parisc/include/asm.

Yes.  My patches are still based on older version (2.6.27-rc2 or so).

git cares renaming well, so it shouldn't be a big problem.
I just tested it now and git-pull (oh now it's "git pull" :) renames
it automatically indeed.

Cool (tbh I know very few about git just git clone to grab a tree and git pull 
to get update from time to time ;-))


Tx to your attention,

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