bpf_event_output_nest_level 506 kernel/trace/bpf_trace.c static DEFINE_PER_CPU(int, bpf_event_output_nest_level); bpf_event_output_nest_level 516 kernel/trace/bpf_trace.c int nest_level = this_cpu_inc_return(bpf_event_output_nest_level); bpf_event_output_nest_level 548 kernel/trace/bpf_trace.c this_cpu_dec(bpf_event_output_nest_level);