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Date: Tue, 24 Mar 2020 23:06:41 +0100
From: Peter Zijlstra <>
To: Kees Cook <>
Cc: Thomas Gleixner <>,
	Elena Reshetova <>,,
	Andy Lutomirski <>,
	Catalin Marinas <>,
	Will Deacon <>, Mark Rutland <>,
	Alexander Potapenko <>,
	Ard Biesheuvel <>,
	Jann Horn <>,
	"Perla, Enrico" <>,,,,
Subject: Re: [PATCH v2 1/5] jump_label: Provide CONFIG-driven build state

On Tue, Mar 24, 2020 at 01:32:27PM -0700, Kees Cook wrote:
> Choosing the initial state of static branches changes the assembly
> layout (if the condition is expected to be likely, inline, or unlikely,
> out of line via a jump). A few places in the kernel use (or could be
> using) a CONFIG to choose the default state, so provide the
> infrastructure to do this and convert the existing cases (init_on_alloc
> and init_on_free) to the new macros.
> Signed-off-by: Kees Cook <>


Acked-by: Peter Zijlstra (Intel) <>

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