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Date: Mon, 28 Jan 2002 17:26:20 -0500
From: Daniel Jacobowitz <dan@debian.org>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Manfred Spraul <manfred@colorfullife.com>, linux-kernel@vger.kernel.org,
        Andrew Morton <akpm@zip.com.au>
Subject: Re: [PATCH?] Crash in 2.4.17/ptrace
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On Mon, Jan 28, 2002 at 10:05:31PM +0000, Alan Cox wrote:
> > For framebuffers addresses, there is no page structure, and then the
> > page reference count updates read/write to random memory.
> 
> If it is a physical pci bus object why do we need to refcount it, surely
> "no page" is ok. Its just up to the driver not to do anything stupid and
> the core code to honour the pci/pci transfer quirks (or when faced with
> a hard one just say "no")

So, is there a clear interface by which access_process_vm ought to be
able to get at the mapped framebuffer, or should get_user_pages just
punt off it?

-- 
Daniel Jacobowitz                           Carnegie Mellon University
MontaVista Software                         Debian GNU/Linux Developer
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