linux-kernel - Re: [PATCH v2 4/4] x86/static_call: Add inline static call implementation for x86-64

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Date:   Tue, 27 Nov 2018 09:46:05 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     Andy Lutomirski <luto@...nel.org>, X86 ML <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Jason Baron <jbaron@...mai.com>, Jiri Kosina <jkosina@...e.cz>,
        David Laight <David.Laight@...lab.com>,
        Borislav Petkov <bp@...en8.de>, julia@...com, jeyu@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH v2 4/4] x86/static_call: Add inline static call
 implementation for x86-64

On Mon, Nov 26, 2018 at 02:14:49PM -0600, Josh Poimboeuf wrote:
> On Mon, Nov 26, 2018 at 10:28:08AM -0800, Andy Lutomirski wrote:

> > Can you add a comment that it will need updating when kernel CET is added?
> 
> Will do, though I get the feeling there's a lot of other (existing) code
> that will also need to change for kernel CET.

Yeah, function graph tracer and kretprobes at the very least. But I
suspect there's a few surprises to be hand once they try kernel CET.