linux-kernel - Re: [PATCH 17/18] tracing: Add indirect to indirect access for function based events

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Message-ID: <20180212122354.1d2fb867@gandalf.local.home>
Date:   Mon, 12 Feb 2018 12:23:54 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Tom Zanussi <tom.zanussi@...ux.intel.com>,
        linux-rt-users@...r.kernel.org, linux-trace-users@...r.kernel.org,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Clark Williams <williams@...hat.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Jonathan Corbet <corbet@....net>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        kernel-team@....com
Subject: Re: [PATCH 17/18] tracing: Add indirect to indirect access for
 function based events

On Mon, 12 Feb 2018 11:15:34 +0900
Namhyung Kim <namhyung@...nel.org> wrote:

> > It should have been:
> > 
> > 		return process_redirects(arg, val, buf);  
> 
> But I think you need to consider data type of the arg when
> dereferencing the last redirect.

What for?

Also this code has also changed. I haven't posted new patches but my
latest is in my git tree in the branch ftrace/dynamic-ftrace-events.

-- Steve