linux-kernel - Re: [PATCH] dmaengine: provide dummy functions for DMA

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Message-ID: <AANLkTim-1xCmk1S3KhdFazYCizzex0C5c_PtpjQoVkvj@mail.gmail.com>
Date:	Wed, 22 Dec 2010 15:56:26 -0800
From:	Dan Williams <dan.j.williams@...el.com>
To:	Guennadi Liakhovetski <g.liakhovetski@....de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dmaengine: provide dummy functions for DMA_ENGINE=n

On Wed, Dec 22, 2010 at 5:46 AM, Guennadi Liakhovetski
<g.liakhovetski@....de> wrote:
> This lets drivers, optionally using the dmaengine, build with DMA_ENGINE
> unselected.
>
> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@....de>
> ---
>  include/linux/dmaengine.h |   13 ++++++++++---
>  1 files changed, 10 insertions(+), 3 deletions(-)

Is this fixing build errors, or is this just relieving drivers from
needing to surround calls to dma_{request|release}_channel() with
ifdef CONFIG_DMA_ENGINE?  The former makes this more urgent, the
latter can wait for the next merge window.

--
Dan
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