linux-kernel - Re: [PATCH 02/24] x86/traps: Move arch/x86/kernel/traps.c to arch/x86/entry/

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Message-ID: <YTC+FTo4uLLdyBxA@hirez.programming.kicks-ass.net>
Date:   Thu, 2 Sep 2021 14:05:41 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Lai Jiangshan <laijs@...ux.alibaba.com>
Cc:     Joerg Roedel <jroedel@...e.de>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        linux-kernel@...r.kernel.org, Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Brijesh Singh <brijesh.singh@....com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Arvind Sankar <nivedita@...m.mit.edu>,
        Chester Lin <clin@...e.com>, Juergen Gross <jgross@...e.com>,
        andrew.cooper3@...rix.com
Subject: Re: [PATCH 02/24] x86/traps: Move arch/x86/kernel/traps.c to
 arch/x86/entry/

On Thu, Sep 02, 2021 at 07:54:25PM +0800, Lai Jiangshan wrote:
> For example, stack-protector is instrumenting many noninstr functions now
> if the CONFIG is yes.  It is normally Ok and gcc is adding per-function control
> on it.

IIRC the latest compiler have an attribute for this too, that really
should be added to noinstr. Lemme go find.