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From: Roland Dreier <rdreier@cisco.com>
To: vb <vb@vsbe.com>
Subject: Re: Allocating uncached memory in 2.6.25(powerpc/440)
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	<f608b67d0809191456p7193a0bfh3529d9241a304301@mail.gmail.com>
Date: Fri, 19 Sep 2008 15:09:35 -0700
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	(vb@vsbe.com's message of "Fri, 19 Sep 2008 14:56:11 -0700")
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 > basically, a block of contiguous memory is allocated. This block is
 > needed to set up some DMA descriptors, so it needs to be uncached, and
 > I thought this is what GFP_DMA flag is for.

No, GFP_DMA doesn't have that meaning.  To allocate uncached memory, use
dma_alloc_coherent().

 - R.