linux-kernel - Re: [PATCH] dma-mapping: Remove WARN_ON in dma_free

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Message-ID: <20100329204123.GA32165@parisc-linux.org>
Date:	Mon, 29 Mar 2010 14:41:24 -0600
From:	Matthew Wilcox <matthew@....cx>
To:	Stefan Bader <stefan.bader@...onical.com>
Cc:	mingo@...e.hu, hpa@...or.com, linux-kernel@...r.kernel.org,
	James.Bottomley@...e.de
Subject: Re: [PATCH] dma-mapping: Remove WARN_ON in dma_free_coherent

On Mon, Mar 29, 2010 at 08:09:21PM +0200, Stefan Bader wrote:
> But it seems modifying that driver would be a bigger effort and maybe
> not really worthwile as it is a rather old driver. On the other side
> I was told [1] that this WARN_ON applies only to ARM which could sleep
> in the free path and it is just bogus for X86. As the code is in
> arch/x86 it would never be used for anything else than X86 and if
> its truely bogus on X86, couldn't it get removed?

My suggestion was that you remove it from the Ubuntu kernel, not submit
it upstream.

-- 
Matthew Wilcox				Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."
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