linux-kernel - Re: [PATCH 3/3] x86/ftrace: Use text

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Message-ID: <20191023134219.33e41458@gandalf.local.home>
Date:   Wed, 23 Oct 2019 13:42:19 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>, X86 ML <x86@...nel.org>,
        Nadav Amit <nadav.amit@...il.com>,
        Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Song Liu <songliubraving@...com>,
        Masami Hiramatsu <mhiramat@...nel.org>
Subject: Re: [PATCH 3/3] x86/ftrace: Use text_poke()

On Wed, 23 Oct 2019 12:23:06 -0400
Steven Rostedt <rostedt@...dmis.org> wrote:

> All you need to do is:
> 
> 	register_ftrace_direct((unsigned long)func_you_want_to_trace,
> 			       (unsigned long)your_trampoline);
> 


> 
> Alexei,
> 
> Would this work for you?

I just pushed a test branch up to:

 git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git

 branch: ftrace/direct

Again, it's mostly development code, and may be buggy. (don't try
tracing when a direct function is added yet).

If this is something that you can use, then I'll work to clean it up
and sort out all the bugs.

Thanks!

-- Steve