linux-kernel - Re: [PATCH][RFC] asm-generic:remove calling flush_write_buffers() in dma_sync_*_for

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Date:	Tue, 7 Jul 2009 09:54:20 +0800
From:	Ming Lei <tom.leiming@...il.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Joerg Roedel <joerg.roedel@....com>,
	fujita.tomonori@....ntt.co.jp, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, Russell King <rmk@....linux.org.uk>,
	linux-arm-kernel <linux-arm-kernel@...ts.arm.linux.org.uk>
Subject: Re: [PATCH][RFC] asm-generic:remove calling flush_write_buffers() in 
	dma_sync_*_for_cpu

2009/6/30 Arnd Bergmann <arnd@...db.de>:
> On Tuesday 30 June 2009, Alan Cox wrote:
> Well, not even that. dma-mapping-common.h only makes sense on architectures
> that have multiple dma-mapping implementations (parisc, mips, arm, powerpc,

It seems that there is only one dma-mmaping implementation on ARM, doesn't it?
Is it necessary that using dma-mapping-common.h on ARM?

> sparc, ia64 and x86, possibly alpha). All others including frv only need a
> nommu case anyway and would not use dma-mapping-common.h but could be
> changed to use something like the dma-mapping-linear.h I worked on recently.




-- 
Lei Ming
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