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Date: Wed, 14 Oct 2020 15:46:59 -0700
From: Kees Cook <>
To: Thomas Gleixner <>,
	Josh Poimboeuf <>
Cc: Masahiro Yamada <>,
	Sami Tolvanen <>,
	Steven Rostedt <>, Will Deacon <>,
	Peter Zijlstra <>,
	Greg Kroah-Hartman <>,
	"Paul E. McKenney" <>,
	Nick Desaulniers <>,,,,,,,,
Subject: Re: [PATCH v6 22/25] x86/asm: annotate indirect jumps

On Mon, Oct 12, 2020 at 05:32:00PM -0700, Sami Tolvanen wrote:
> Running objtool --vmlinux --duplicate on vmlinux.o produces a few
> warnings about indirect jumps with retpoline:
>   vmlinux.o: warning: objtool: wakeup_long64()+0x61: indirect jump
>   found in RETPOLINE build
>   ...
> This change adds ANNOTATE_RETPOLINE_SAFE annotations to the jumps
> in assembly code to stop the warnings.
> Signed-off-by: Sami Tolvanen <>

Reviewed-by: Kees Cook <>

This looks like it's an independent fix -- can an x86 maintainer pick
up this patch directly?

Kees Cook

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