linux-kernel - Re: [PATCH 1/2] dmaengine: omap: hide filter

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Date:	Mon, 12 May 2014 15:17:21 -0700
From:	Tony Lindgren <tony@...mide.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Russell King <rmk+kernel@....linux.org.uk>,
	Vinod Koul <vinod.koul@...el.com>, dmaengine@...r.kernel.org
Subject: Re: [PATCH 1/2] dmaengine: omap: hide filter_fn for built-in drivers

* Arnd Bergmann <arnd@...db.de> [140508 07:57]:
> It is not possible to reference the omap_dma_filter_fn filter
> function from a built-in driver if the dmaengine driver itself
> is a loadable module, which is a valid configuration otherwise.
> 
> This provides only the dummy alternative if the function
> is referenced by a built-in driver to allow a successful
> build. The filter function is only required by ATAGS based
> platforms, which will continue to be broken after this change
> for the bogus configuration. When booting from DT, with the
> dma channels correctly listed there, it will work fine.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
Acked-by: Tony Lindgren <tony@...mide.com>
> Cc: Russell King <rmk+kernel@....linux.org.uk>
> Cc: Vinod Koul <vinod.koul@...el.com>
> Cc: dmaengine@...r.kernel.org
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