find_trace_kprobe
tk = find_trace_kprobe(pevent, group);
tk = find_trace_kprobe("testprobe", KPROBE_EVENT_SYSTEM);
tk = find_trace_kprobe("testprobe2", KPROBE_EVENT_SYSTEM);
tk = find_trace_kprobe("testprobe", KPROBE_EVENT_SYSTEM);
tk = find_trace_kprobe("testprobe2", KPROBE_EVENT_SYSTEM);
old_tk = find_trace_kprobe(trace_probe_name(&tk->tp),