Re: [PATCH] x86/fpu: move FPU state into separate cache

From: Linus Torvalds
Date: Wed Mar 29 2017 - 17:41:17 EST


On Wed, Mar 29, 2017 at 2:35 PM, Andy Lutomirski <luto@xxxxxxxxxxxxxx> 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.

Linus