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Date: Wed, 13 May 2009 17:57:14 -0600
From: Robert Hancock <hancockrwd@gmail.com>
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To: Alan Cox <alan@lxorguk.ukuu.org.uk>
CC: Brad Boyer <flar@allandria.com>,
       Michael Schmitz <schmitz@biophys.uni-duesseldorf.de>,
       Arnd Bergmann <arnd@arndb.de>, linux-kernel@vger.kernel.org,
       Jeff Garzik <jgarzik@pobox.com>, linux-ide@vger.kernel.org,
       takata@linux-m32r.org, geert@linux-m68k.org, linux-m68k@vger.kernel.org,
       ysato@users.sourceforge.jp
Subject: Re: [PATCH] ata: libata depends on HAS_DMA
References: <20090511222702.352192505@arndb.de>	<200905112238.55404.arnd@arndb.de>	<20090512090602.65722342@lxorguk.ukuu.org.uk>	<200905121123.21436.arnd@arndb.de>	<20090513033027.GA13193@cynthia.pants.nu>	<alpine.DEB.1.00.0905130610240.18305@zirkon.biophys.uni-duesseldorf.de>	<20090513043409.GA13577@cynthia.pants.nu> <20090513095127.308b00e7@lxorguk.ukuu.org.uk>
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Alan Cox wrote:
>>> If it doesn't interfere with plain PIO mode, fine. 
>> I agree. There definitely needs to still be support for IDE ports that
>> don't have DMA capability.
> 
> There is - it's just if the platform doesn't implement the dma_* APIs you
> get a problem.

Wouldn't the easiest solution be to just dummy out the DMA API calls on 
this platform to always fail? That would fix these compile problems..