From: Krzysztof Kozlowski krzysztof.kozlowski@canonical.com

[ Upstream commit 6fec1ab67f8d60704cc7de64abcfd389ab131542 ]

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 --- .../selftests/ftrace/test.d/ftrace/func_set_ftrace_file.tc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/func_set_ftrace_file.tc b/tools/testing/selftests/ftrace/test.d/ftrace/func_set_ftrace_file.tc index 51f6e6146bd93..951b4311930c5 100644 --- a/tools/testing/selftests/ftrace/test.d/ftrace/func_set_ftrace_file.tc +++ b/tools/testing/selftests/ftrace/test.d/ftrace/func_set_ftrace_file.tc @@ -22,7 +22,7 @@ fail() { # mesg

FILTER=set_ftrace_filter FUNC1="schedule" -FUNC2="do_softirq" +FUNC2="scheduler_tick"

ALL_FUNCS="#### all functions enabled ####"