linux-kernel - Re: [PATCH] visl: use canonical ftrace path

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Message-ID: <20230831093900.1ba0bc82@rorschach.local.home>
Date:   Thu, 31 Aug 2023 09:39:00 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Ross Zwisler <zwisler@...nel.org>
Cc:     linux-kernel@...r.kernel.org, Ross Zwisler <zwisler@...gle.com>,
        Mark Rutland <mark.rutland@....com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
        Daniel Almeida <daniel.almeida@...labora.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>
Subject: Re: [PATCH] visl: use canonical ftrace path

On Tue, 29 Aug 2023 14:46:01 -0600
Ross Zwisler <zwisler@...nel.org> wrote:

> From: Ross Zwisler <zwisler@...gle.com>
> 
> The canonical location for the tracefs filesystem is at /sys/kernel/tracing.
> 
> But, from Documentation/trace/ftrace.rst:
> 
>   Before 4.1, all ftrace tracing control files were within the debugfs
>   file system, which is typically located at /sys/kernel/debug/tracing.
>   For backward compatibility, when mounting the debugfs file system,
>   the tracefs file system will be automatically mounted at:
> 
>   /sys/kernel/debug/tracing
> 
> Update the visl decoder driver documentation to use this tracefs path.
> 
> Signed-off-by: Ross Zwisler <zwisler@...gle.com>

Reviewed-by: Steven Rostedt (Google) <rostedt@...dmis.org>

Thanks Ross!

-- Steve