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Subject: RE: Calculating kernel logical address ..
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: imran.badr@cavium.com
Cc: root@chaos.analogic.com, "'David S. Miller'" <davem@redhat.com>,
       phillips@arcor.de, linux-kernel@vger.kernel.org
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Date: 09 Sep 2002 22:55:26 +0100
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On Mon, 2002-09-09 at 19:12, Imran Badr wrote:
> But my question here still begging an answer: What would be the portable way
> to calculate kernel logical address of that user buffer?

Who says it even has one ? Not all user allocated pages are even mapped
into the kernel by default. The kiobuf stuff used in 2.4 will do the job
for 2.4. For 2.5 the API will probably look a little different and be a
fair bit faster

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