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From: Daniel Phillips <phillips@arcor.de>
To: Jesse Barnes <jbarnes@sgi.com>,
       "Richard B. Johnson" <root@chaos.analogic.com>
Subject: Re: Calculating kernel logical address ..
Date: Mon, 9 Sep 2002 20:25:56 +0200
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Cc: Imran Badr <imran.badr@cavium.com>, "'David S. Miller'" <davem@redhat.com>,
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On Monday 09 September 2002 20:13, Jesse Barnes wrote:
> On Mon, Sep 09, 2002 at 02:00:35PM -0400, Richard B. Johnson wrote:
> > Well I just read Documentation/DMA-mapping.txt as advised by David
> > and it seems as though it will no longer be possible to do what
> > many programmers have been wanting to do, to wit:
> > 
> > (1) In user-code, allocate a buffer.
> > (2) Lock that buffer into memory.
> > (3) Call some driver that DMAs data to/from that buffer.
> 
> It looks drivers/media/video/video-buf.c uses alloc_kiovec() and
> map_user_kiobuf() to do it.  And I think Ben LaHaise was talking about
> removing these functions and creating some other, lightweight
> interface for the same purpose?

Hopefully.  My understanding is that kio is obsoleted by bio and aio,
anyone want to confirm/deny this?

-- 
Daniel
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