Re: [bigmem-patch] 4GB with Linux on IA32

Alan Cox
1999-08-17T11:46:35Z

> I will give you one example of the type of cases that I am talking about.
> In drivers/char/bttv.c, VIDIOCSFBUF ioctl seems to be setting the "vidadr"
> to a kernel virtual address from the physical address present in the
> user's pte. This will not work for bigmem pages.

Oh now I understand Linus rather bizarre message

VIDIOCSFBUF takes a physical base address. The &1 stuff thats i nthere is
a debug hook that never got taken out. You can ignore the &1 case in that
ioctl or just remove it.

Alan