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Date: Thu, 23 Jun 2016 20:53:40 +0200
From: Peter Zijlstra <>
To: Linus Torvalds <>
Cc: Oleg Nesterov <>, Andy Lutomirski <>,
	Andy Lutomirski <>,
	the arch/x86 maintainers <>,
	Linux Kernel Mailing List <>,
	"" <>,
	Borislav Petkov <>, Nadav Amit <>,
	Kees Cook <>, Brian Gerst <>,
	"" <>,
	Josh Poimboeuf <>, Jann Horn <>,
	Heiko Carstens <>
Subject: Re: [PATCH v3 00/13] Virtually mapped stacks with guard pages (x86,

On Thu, Jun 23, 2016 at 10:52:58AM -0700, Linus Torvalds wrote:
> Ugh. Looking around at this, it turns out that a great example of this
> kind of legacy issue is the debug_mutex stuff.
> It uses "struct thread_info *" as the owner pointer, and there is _no_
> existing reason for it. In fact, in every single place it actually
> wants the task_struct, and it does task_thread_info(task) just to
> convert it to the thread-info, and then converts it back with
> "ti->task".
> So the attached patch seems to be the right thing to do regardless of
> this whole discussion.

Yeah, that looks fine. Want me to take it or will you just commit?

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