--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
      cant_sleep();
--- a/kernel/tracepoint.c
+++ b/kernel/tracepoint.c
 {
      if (!tp_funcs)
            return TP_FUNC_0;
+     if (!tp_funcs[0].func)
+           return TP_FUNC_0;
      if (!tp_funcs[1].func)
            return TP_FUNC_1;
      if (!tp_funcs[2].func)