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

Alan Cox (alan@lxorguk.ukuu.org.uk)
Tue, 17 Aug 1999 12:46:35 +0100 (BST)

> 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

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