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Date: Fri, 8 Sep 2017 08:44:22 -0700
From: Kees Cook <>
To: Christoph Hellwig <>
Cc: Tycho Andersen <>, LKML <>, 
	Linux-MM <>, 
	"" <>, 
	Marco Benatto <>, 
	Juerg Haefliger <>, 
	"" <>, "" <>
Subject: Re: [PATCH v6 10/11] mm: add a user_virt_to_phys symbol

On Fri, Sep 8, 2017 at 12:55 AM, Christoph Hellwig <> wrote:
> On Thu, Sep 07, 2017 at 11:36:08AM -0600, Tycho Andersen wrote:
>> We need someting like this for testing XPFO. Since it's architecture
>> specific, putting it in the test code is slightly awkward, so let's make it
>> an arch-specific symbol and export it for use in LKDTM.
> We really should not add an export for this.
> I think you'll want to just open code it in your test module.

Isn't that going to be fragile? Why not an export?


Kees Cook
Pixel Security

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