linux-kernel - Re: [PATCH v2 12/14] objtool: Allow archs to rewrite retpolines

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Message-ID: <YFSm55W64AcBki+1@hirez.programming.kicks-ass.net>
Date:   Fri, 19 Mar 2021 14:28:07 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     x86@...nel.org, jgross@...e.com, mbenes@...e.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 12/14] objtool: Allow archs to rewrite retpolines

On Fri, Mar 19, 2021 at 12:21:03PM +0100, Peter Zijlstra wrote:
> Let me see if I can come up with something better.

Duh, we can put the instructions on a list and process them later, just
like static_call, can even use the same insn list_head since a retpoline
cannot be a static call.

Lemme go make that happen.