trace_pid_write 6632 kernel/trace/ftrace.c ret = trace_pid_write(filtered_pids, &pid_list, ubuf, cnt); trace_pid_write 778 kernel/trace/trace.h int trace_pid_write(struct trace_pid_list *filtered_pids, trace_pid_write 1597 kernel/trace/trace_events.c ret = trace_pid_write(filtered_pids, &pid_list, ubuf, cnt);