linux-kernel - Re: [PATCH V2 5/9] x86/alternative: Split text_poke

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Message-ID: <nycvar.YFH.7.76.1812190944040.17216@cbobk.fhfr.pm>
Date:   Wed, 19 Dec 2018 09:44:17 +0100 (CET)
From:   Jiri Kosina <jikos@...nel.org>
To:     Daniel Bristot de Oliveira <bristot@...hat.com>
cc:     linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Pavel Tatashin <pasha.tatashin@...cle.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        "Steven Rostedt (VMware)" <rostedt@...dmis.org>,
        Zhou Chengming <zhouchengming1@...wei.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Chris von Recklinghausen <crecklin@...hat.com>,
        Jason Baron <jbaron@...mai.com>, Scott Wood <swood@...hat.com>,
        Marcelo Tosatti <mtosatti@...hat.com>,
        Clark Williams <williams@...hat.com>, x86@...nel.org
Subject: Re: [PATCH V2 5/9] x86/alternative: Split text_poke_bp() into tree
 steps

On Tue, 18 Dec 2018, Daniel Bristot de Oliveira wrote:

> text_poke_bp() updates instructions on live kernel on SMP in three steps:
>  1) add a int3 trap to the address that will be patched
>  2) update all but the first byte of the patched range
>  3) replace the first byte (int3) by the first byte of
> 
> This patch creates one function for each of these steps.
> 
> Signed-off-by: Daniel Bristot de Oliveira <bristot@...hat.com>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Borislav Petkov <bp@...en8.de>
> Cc: "H. Peter Anvin" <hpa@...or.com>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Pavel Tatashin <pasha.tatashin@...cle.com>
> Cc: Masami Hiramatsu <mhiramat@...nel.org>
> Cc: "Steven Rostedt (VMware)" <rostedt@...dmis.org>
> Cc: Zhou Chengming <zhouchengming1@...wei.com>
> Cc: Jiri Kosina <jkosina@...e.cz>

Acked-by: Jiri Kosina <jkosina@...e.cz>

-- 
Jiri Kosina
SUSE Labs