Re: Calculating kernel logical address ..

Daniel Phillips
2002-09-09T18:39:06Z

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