linux-kernel - Re: [FIX PATCH v2] selftests: tracing: Fix to unmount tracefs for recovering environment

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Message-ID: <20230911212453.58b9082a@gandalf.local.home>
Date:   Mon, 11 Sep 2023 21:24:53 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     "Masami Hiramatsu (Google)" <mhiramat@...nel.org>
Cc:     Shuah Khan <shuah@...nel.org>, Mark Brown <broonie@...nel.org>,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: Re: [FIX PATCH v2] selftests: tracing: Fix to unmount tracefs for
 recovering environment

On Tue, 12 Sep 2023 10:10:39 +0900
"Masami Hiramatsu (Google)" <mhiramat@...nel.org> wrote:

> From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
> 
> Fix to unmount the tracefs if the ftracetest mounted it for recovering
> system environment. If the tracefs is already mounted, this does nothing.
> 
> Suggested-by: Mark Brown <broonie@...nel.org>
> Link: https://lore.kernel.org/all/29fce076-746c-4650-8358-b4e0fa215cf7@sirena.org.uk/
> Fixes: cbd965bde74c ("ftrace/selftests: Return the skip code when tracing directory not configured in kernel")
> Signed-off-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>
> ---
>  Changes in v2:
>    - use -n option explictly for testing the string is non-zero.
> ---
>  tool

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

-- Steve