linux-kernel - Re: [PATCH] dma: remove bad_dma

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Date:	Mon, 13 Jun 2016 09:59:23 +0200
From:	Christoph Hellwig <hch@....de>
To:	Sudip Mukherjee <sudipm.mukherjee@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Simran Rai <ssimran@...adcom.com>,
	Christoph Hellwig <hch@....de>
Subject: Re: [PATCH] dma: remove bad_dma_ops to fix build fail

On Sun, Jun 12, 2016 at 02:32:24PM -0700, Jerry Snitselaar wrote:
> Ccing Christoph since his commit introduced bad_dma_ops, and Simran
> who wrote that cygnus code.
>
> I'm thinking that is there to complain loudly when someone is trying
> to use dma without HAS_DMA, correct Christoph?

Yes.  Note that I just refactored the code - before my commit
we simply had prototypes for the various DMA API functions that
never had an implementation to back them.