kernel/trace/trace_events.c:1141: warning: No description found for return value of 'trace_set_clr_event'
kernel/trace/trace_events.c:1166: warning: No description found for return value of 'trace_array_set_clr_event'
kernel/trace/trace_events.c:3930: warning: No description found for return value of 'event_trace_add_tracer'
kernel/trace/trace_events.c:1145: warning: No description found for return value of 'trace_set_clr_event'
kernel/trace/trace_events.c:1170: warning: No description found for return value of 'trace_array_set_clr_event'
kernel/trace/trace_events.c:3934: warning: No description found for return value of 'event_trace_add_tracer'