From mboxrd@z Thu Jan  1 00:00:00 1970
From: Arnd Bergmann <arnd@arndb.de>
Date: Fri, 31 May 2013 15:04:17 +0000
Subject: Re: [PATCH v2] dmaengine: shdma: fix a build failure on platforms with no DMA support
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To: linux-arm-kernel@lists.infradead.org

On Friday 31 May 2013 10:00:29 Dan Murphy wrote:
> My consideration was that since this is an exported symbol that a driver
> could call this API explicitly without checking for
> the function pointer first, there is a potential of calling a NULL pointer.

Drivers never call a filter function directly, so that is not an issue.
Even if a driver would try it, that would not actually compile.
	
	Arnd