linux-kernel - Re: [PATCH] ata: libata depends on HAS

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Date:	Tue, 12 May 2009 09:06:02 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linux-kernel@...r.kernel.org, Jeff Garzik <jgarzik@...ox.com>,
	linux-ide@...r.kernel.org
Subject: Re: [PATCH] ata: libata depends on HAS_DMA

On Mon, 11 May 2009 22:38:55 +0000
Arnd Bergmann <arnd@...db.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@...db.de>

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

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