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[ Upstream commit41f37c852a] kprobe_args_{char,string}.tc are using available_filter_functions file which is provided by function tracer. Thus if function tracer is disabled, these tests are failed on recent kernels because tracefs_create_dir is not raised events by adding a dynamic event. Add available_filter_functions to requires line. Fixes:7c1130ea5c("test: ftrace: Fix kprobe test for eventfs") Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>