linux-kernel - Re: [PATCH v2 01/14] objtool: Tag retpoline thunk symbols

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Message-ID: <20211020151714.sf3wq4d7wuya5jbj@treble>
Date:   Wed, 20 Oct 2021 08:17:14 -0700
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     x86@...nel.org, andrew.cooper3@...rix.com,
        linux-kernel@...r.kernel.org, alexei.starovoitov@...il.com,
        ndesaulniers@...gle.com
Subject: Re: [PATCH v2 01/14] objtool: Tag retpoline thunk symbols

On Wed, Oct 20, 2021 at 12:44:43PM +0200, Peter Zijlstra wrote:
> In order to avoid calling arch_is_retpoline() (which does a strcmp)
> over and over on symbols, tag them once upfront.
> 
> XXX do we also want to do __fentry__ ?

Might as well.

> XXX do we want an enum instead of a bunch of bools ?

Maybe, or convert the bools to bit fields.

-- 
Josh