linux-kernel - Re: [PATCH 4/5] x86/alternative: make .altinstr

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Message-ID: <20220312153133.GE28057@worktop.programming.kicks-ass.net>
Date:   Sat, 12 Mar 2022 16:31:33 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Alexey Dobriyan <adobriyan@...il.com>
Cc:     x86@...nel.org, tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, hpa@...or.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/5] x86/alternative: make .altinstr_replacement section
 non-executable

On Fri, Mar 11, 2022 at 05:43:11PM +0300, Alexey Dobriyan wrote:
> Instructions in .altinstr_replacement section aren't meant to be
> executed by CPU directly, only after being copied to the real
> instruction stream in .text/.init_text.

But who cares; the entire section is deleted right along with
.init_text.