trace_save_cmdline
int trace_save_cmdline(struct task_struct *tsk);
done = !(flags & TRACE_RECORD_CMDLINE) || trace_save_cmdline(task);
done = !(flags & TRACE_RECORD_CMDLINE) || trace_save_cmdline(prev);
done &= !(flags & TRACE_RECORD_CMDLINE) || trace_save_cmdline(next);