linux-kernel - Re: [BUGFIX PATCH 2/3] selftests/ftrace: Fix ftrace test cases to check unsupported

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Date:   Mon, 25 Nov 2019 08:36:14 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Shuah Khan <shuah@...nel.org>, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [BUGFIX PATCH 2/3] selftests/ftrace: Fix ftrace test cases to
 check unsupported

On Sun, 24 Nov 2019 16:39:57 -0500
Steven Rostedt <rostedt@...dmis.org> wrote:

> On Sun, 24 Nov 2019 13:55:48 +0900
> Masami Hiramatsu <mhiramat@...nel.org> wrote:
> 
> > Since function tracer can be disabled, set_ftrace_filter can be
> > disappeared. The test cases must check whether the set_ftrace_filter
> > exists or not before testing and if not, return it as unsupported.
> > 
> > Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
> > ---
> >  .../ftrace/test.d/ftrace/func-filter-stacktrace.tc |    2 ++
> >  .../selftests/ftrace/test.d/ftrace/func_cpumask.tc |    5 +++++
> >  2 files changed, 7 insertions(+)
> > 
> > diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/func-filter-stacktrace.tc b/tools/testing/selftests/ftrace/test.d/ftrace/func-filter-stacktrace.tc
> > index 36fb59f886ea..1a52f2883fe0 100644
> > --- a/tools/testing/selftests/ftrace/test.d/ftrace/func-filter-stacktrace.tc
> > +++ b/tools/testing/selftests/ftrace/test.d/ftrace/func-filter-stacktrace.tc
> > @@ -3,6 +3,8 @@
> >  # description: ftrace - stacktrace filter command
> >  # flags: instance
> >  
> > +[ ! -f set_ftrace_filter ] && exit_unsupported
> > +
> >  echo _do_fork:stacktrace >> set_ftrace_filter
> >  
> >  grep -q "_do_fork:stacktrace:unlimited" set_ftrace_filter
> > diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/func_cpumask.tc b/tools/testing/selftests/ftrace/test.d/ftrace/func_cpumask.tc
> > index 86a1f07ef2ca..7757b549f0b6 100644
> > --- a/tools/testing/selftests/ftrace/test.d/ftrace/func_cpumask.tc
> > +++ b/tools/testing/selftests/ftrace/test.d/ftrace/func_cpumask.tc
> > @@ -15,6 +15,11 @@ if [ $NP -eq 1 ] ;then
> >    exit_unresolved
> >  fi
> >  
> > +if ! grep -q function available_tracers ; then
> > +  echo "Function trace is not enabled"
> > +  exit_unsupported
> > +fi
> 
> This change is not described in the change log.

Oops, my mistake. Thanks!

> 
> -- Steve
> 
> > +
> >  ORIG_CPUMASK=`cat tracing_cpumask`
> >  
> >  do_reset() {
> 


-- 
Masami Hiramatsu <mhiramat@...nel.org>