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[ Upstream commit0a8bb688aa] When unloading module, the tprobe events are not correctly cleaned up. Thus it becomes `fprobe-event` and never be enabled again even if loading the same module again. For example; # cd /sys/kernel/tracing # modprobe trace_events_sample # echo 't:my_tprobe foo_bar' >> dynamic_events # cat dynamic_events t:tracepoints/my_tprobe foo_bar # rmmod trace_events_sample # cat dynamic_events f:tracepoints/my_tprobe foo_bar As you can see, the second time my_tprobe starts with 'f' instead of 't'. This unregisters the fprobe and tracepoint callback when module is unloaded but marks the fprobe-event is tprobe-event. Link: https://lore.kernel.org/all/174158724946.189309.15826571379395619524.stgit@mhiramat.tok.corp.google.com/ Fixes:57a7e6de9e("tracing/fprobe: Support raw tracepoints on future loaded modules") Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>