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Date: Wed, 29 Mar 2017 14:41:00 -0700
From: Linus Torvalds <>
To: Andy Lutomirski <>
Cc: Kees Cook <>, "H. Peter Anvin" <>, 
	LKML <>, Rik van Riel <>, 
	Andy Lutomirski <>, Thomas Gleixner <>, Ingo Molnar <>, 
	"" <>, Paolo Bonzini <>, 
	Radim Krčmář <>, 
	Peter Zijlstra <>, Dave Hansen <>, 
	Yu-cheng Yu <>, Masahiro Yamada <>, 
	Borislav Petkov <>, Christian Borntraeger <>, 
	Thomas Garnier <>, Brian Gerst <>, 
	He Chen <>, Mathias Krause <>, 
	Fenghua Yu <>, Piotr Luc <>, Kyle Huey <>, 
	Len Brown <>, KVM <>, 
	"" <>
Subject: Re: [PATCH] x86/fpu: move FPU state into separate cache

On Wed, Mar 29, 2017 at 2:35 PM, Andy Lutomirski <> wrote:
> Randomization also needs to leave thread_info at the beginning.  Can it do that?

Good point, and good question. No idea if the gcc extension can do,
but yes, it clearly needs a "you can't move this entry".

I assume it has some such capability already, because it's fairly
common to have that kind of "beginning of structure if fixed" due to
unions of structures anyway.


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