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selftests/ftrace: Return unsupported if no error_log file

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commit 619ee76f5c9f6a1d601d1a056a454d62bf676ae4 upstream.

Check whether error_log file exists in tracing/error_log testcase
and return UNSUPPORTED if no error_log file.

This can happen if we run the ftracetest on the older stable
kernel.

Fixes: 4eab1cc461 ("selftests/ftrace: Add tracing/error_log testcase")
Cc: stable@vger.kernel.org
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Masami Hiramatsu 2020-05-25 19:20:57 +09:00 • committed by Greg Kroah-Hartman
commit fe09572546
1 changed files with 2 additions and 0 deletions
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2
tools/testing/selftests/ftrace/test.d/ftrace/tracing-error-log.tc
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@ -14,6 +14,8 @@ if [ ! -f set_event ]; then
exit_unsupported
fi
[ -f error_log ] || exit_unsupported
ftrace_errlog_check 'event filter parse error' '((sig >= 10 && sig < 15) || dsig ^== 17) && comm != bash' 'events/signal/signal_generate/filter'
exit 0