linux-kernel - Re: [PATCH UPDATED] x86: set PAE PHYSICAL_MASK

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Date:	Fri, 06 Jun 2008 14:50:45 +0100
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Andi Kleen <andi@...stfloor.org>
CC:	Jan Beulich <jbeulich@...ell.com>,
	Stable Kernel <stable@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH UPDATED] x86: set PAE PHYSICAL_MASK_SHIFT to 44 bits.

Andi Kleen wrote:
> 43bits might be actally safer because of potential sign bugs.
>
> But of course it won't work anyways likely.
>   

I thought about it, but I think we're pretty consistent about putting 
pfns into unsigned types.  But, yes, you're very marginal at that point.

    J
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