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Date: Tue, 12 May 2009 09:06:02 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Arnd Bergmann <arnd@arndb.de>
Cc: linux-kernel@vger.kernel.org, Jeff Garzik <jgarzik@pobox.com>,
       linux-ide@vger.kernel.org
Subject: Re: [PATCH] ata: libata depends on HAS_DMA
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On Mon, 11 May 2009 22:38:55 +0000
Arnd Bergmann <arnd@arndb.de> wrote:

> libata uses the DMA mapping API, so it cannot be built
> on architectures that don't have DMA support.
> 
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Nakked-by: Alan Cox <alan@linux.intel.com>

Almost every PATA adapter can fall back to PIO, many are PIO only. We
need a rather cleaner way to sort this.