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Date:	Tue, 18 Dec 2012 19:57:51 -0800
From:	Yinghai Lu <>
To:	Borislav Petkov <>, Yinghai Lu <>,
	Thomas Gleixner <>,
	Ingo Molnar <>, "H. Peter Anvin" <>,
	"Eric W. Biederman" <>,
	Andrew Morton <>,
Subject: Re: [PATCH v6 05/27] x86, 64bit: clear ident mapping when kernel is
 above 512G

On Sun, Dec 16, 2012 at 9:49 AM, Borislav Petkov <> wrote:
> On Thu, Dec 13, 2012 at 02:01:59PM -0800, Yinghai Lu wrote:
>> After following patch:
>>       x86, 64bit: Set extra ident mapping for whole kernel range
>> We have extra ident mapping for kernel that is loaded above 1G.
> What?
> /me looks at next patch
> Aaah, the *next* patch adds an extra ident mapping. Why don't you say
> so?
>> So need to clear extra pgd entry when kernel is loaded above 512g.
> Why then isn't that patch following the next patch instead of coming
> before it?

make the transition smooth.

zap_ident is after setting in head_64.S

anyway the whole zap_ident get deleted and we don't need this patch anymore.

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