selftests: ftrace: Initialize ftrace before each test
Reset ftrace to initial state before running each test. This fixes some test cases to enable tracing before starting trace test. This can avoid false-positive failure when previous testcase fails while disabling tracing. Link: http://lkml.kernel.org/r/147928398192.22982.7767460638302113002.stgit@devboxSigned-off-by: NMasami Hiramatsu <mhiramat@kernel.org> Suggested-by: NSteven Rostedt <rostedt@goodmis.org> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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