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selftests/ftrace: Do not trace do_softirq because of PREEMPT_RT

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[ Upstream commit 6fec1ab67f ]

The PREEMPT_RT patchset does not use do_softirq() function thus trying
to filter for do_softirq fails for such kernel:

  echo do_softirq
  ftracetest: 81: echo: echo: I/O error

Choose some other visible function for the test.  The function does not
have to be actually executed during the test, because it is only testing
filter API interface.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Krzysztof Kozlowski 2022-02-14 09:36:57 +01:00 committed by Greg Kroah-Hartman
parent 4543426cd7
commit 7d0214c38d
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/ftrace/test.d/ftrace/func_set_ftrace_file.tc
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@ -19,7 +19,7 @@ fail() { # mesg
FILTER=set_ftrace_filter
FUNC1="schedule"
FUNC2="do_softirq"
FUNC2="scheduler_tick"
ALL_FUNCS="#### all functions enabled ####"