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Date: Mon, 21 May 2007 09:24:49 +0200
From: Cornelia Huck <cornelia.huck@de.ibm.com>
Subject: Re: 2.6.22-rc1-mm1 - s390 vs. md
Message-ID: <20070521092449.34a50f2e@gondolin.boeblingen.de.ibm.com>
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To: "Williams, Dan J" <dan.j.williams@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org, NeilBrown <neilb@suse.de>, Martin Schwidefsky <schwidefsky@de.ibm.com>, linux-s390 <linux-s390@vger.kernel.org>
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On Fri, 18 May 2007 09:30:09 -0700,
"Williams, Dan J" <dan.j.williams@intel.com> wrote:

> When CONFIG_DMA_ENGINE=n async_tx_find_channel takes the form:
> ... async_tx_find_channel( ... )
> {
> 	return NULL;
> }
> 
> So in the S390 case the entire asynchronous path will be compiled away.

Unfortunately, do_async_xor() (and others) is not ifdef'ed and contains
dma_map_page(), which led to the compile failure...