linux-kernel - Re: [PATCH v4 4/6] dmaengine: Make DMA Engine menu visible for AVR32 users

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Message-ID: <20080627182900.GC4306@cs181140183.pp.htv.fi>
Date:	Fri, 27 Jun 2008 21:29:00 +0300
From:	Adrian Bunk <bunk@...nel.org>
To:	David Brownell <david-b@...bell.net>
Cc:	Dan Williams <dan.j.williams@...el.com>,
	Haavard Skinnemoen <haavard.skinnemoen@...el.com>,
	Pierre Ossman <drzeus-list@...eus.cx>,
	linux-kernel@...r.kernel.org, linux-embedded@...r.kernel.org,
	kernel@...32linux.org, "Nelson, Shannon" <shannon.nelson@...el.com>
Subject: Re: [PATCH v4 4/6] dmaengine: Make DMA Engine menu visible for
	AVR32 users

On Fri, Jun 27, 2008 at 11:24:42AM -0700, David Brownell wrote:
> On Friday 27 June 2008, Adrian Bunk wrote:
> > The only effect of the HAVE_DMA_ENGINE would be to not show an empty 
> > kconfig menu.
> 
> Well, no.  It would also make the network layer memcpy "acceleration"
> option unavailable when there was no underlying engine ... similarly
> with other pointless "we don't have that subsystem here" options.
>...

This NET_DMA issue has already been fixed 11 months ago - in the same 
patch that added the arch dependency for the menu. [1]

NET_DMA now depends on DMA_ENGINE which gets select'ed by the device 
options. NET_DMA can therefore never be offered on architectures
without any DMA device.

cu
Adrian

[1] http://lkml.org/lkml/2007/7/26/15

-- 

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        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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