From: Dan Hollis <goemon@sasami.anime.net>
  To  : ggi-develop@eskimo.com
  Date: Mon, 20 Jul 1998 11:03:49 -0700 (PDT)

Re: DMA BLTs

On Mon, 20 Jul 1998, Steffen Seeger wrote:
> > On Mon, 20 Jul 1998, Steffen Seeger wrote:
> > > > 1) If a userspace process passes a pointer to blit from/to,
> > > > /dev/graphN can tell whether access to the card is focused on
> > > > that app, but can/how can the kernel identify the calling process and
> > > > verify the physical region is valid and all permissions are kosher?
> > > Using the verify_area() call. 
> > Hasnt this changed somewhat since 2.1.8?
> IIRC the article from the EXPO98 proceedings about kernel hacking states
> this as the recommended procedure. How should it be done then?

http://www.redhat.com:8080/HyperNews/get/devices/exceptions.html

-Dan