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From: "David S. Miller" <davem@redhat.com>
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Date: Mon, 4 Jun 2001 19:03:01 -0700 (PDT)
To: Jeff Garzik <jgarzik@mandrakesoft.com>
Cc: David Woodhouse <dwmw2@infradead.org>, bjornw@axis.com,
        linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org
Subject: Re: Missing cache flush.
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Jeff Garzik writes:
 > David Woodhouse wrote:
 > > I was pointed at Documentation/DMA-mapping.txt but that doesn't seem very
 > > helpful - it's very PCI-specific, and a quick perusal of pci_dma_sync() on
 > > i386 shows that it doesn't do what's required anyway.
 > 
 > What should it do on i386?  mb()?

The x86 doesn't have dumb caches, therefore it really doesn't need to
flush anything.  Maybe a mb(), but that is it.

Later,
David S. Miller
davem@redhat.com