linux-kernel - Re: [BUGFIX PATCH v3 2/4] selftests/ftrace: Fix ftrace test cases to check unsupported

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Date:   Mon, 25 Nov 2019 09:45:57 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     Shuah Khan <shuah@...nel.org>, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [BUGFIX PATCH v3 2/4] selftests/ftrace: Fix ftrace test cases
 to check unsupported

On Mon, 25 Nov 2019 15:57:09 +0900
Masami Hiramatsu <mhiramat@...nel.org> wrote:

> Since dynamic function tracer can be disabled, set_ftrace_filter
> can be disappeared. Test cases which depends on it, must check
> whether the set_ftrace_filter exists or not before testing
> and if not, return as unsupported.
> 
> Also, if the function tracer itself is disabled, we can not
> set "function" to current_tracer. Test cases must check it
> before testing, and return as unsupported.
> 
> Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>

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

-- Steve