linux-kernel - Re: [PATCH 10/18] objtool: Extricate ibt from stack validation

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Message-ID: <YlhN+GFZlycwydSv@hirez.programming.kicks-ass.net>
Date:   Thu, 14 Apr 2022 18:38:16 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        Miroslav Benes <mbenes@...e.cz>
Subject: Re: [PATCH 10/18] objtool: Extricate ibt from stack validation

On Thu, Apr 14, 2022 at 08:44:49AM -0700, Josh Poimboeuf wrote:

> Ok.  That was subtle, it needs a comment or two.  I had the distinct
> feeling I was introducing a bug, then I got distracted ;-)

Right, lemme try and not forget to write one ;-)

> Doesn't the compiler give those special cases ENDBR anyway?  Just
> wondering why we avoid the warning for those.

Sure, but this is about not scribbling that ENDBR with a NOP.