DEFINE_WRITEBACK_EVENT  223 include/trace/events/writeback.h DEFINE_WRITEBACK_EVENT(writeback_nowork);
DEFINE_WRITEBACK_EVENT  224 include/trace/events/writeback.h DEFINE_WRITEBACK_EVENT(writeback_wake_background);
DEFINE_WRITEBACK_EVENT  225 include/trace/events/writeback.h DEFINE_WRITEBACK_EVENT(writeback_bdi_register);
DEFINE_WRITEBACK_EVENT  226 include/trace/events/writeback.h DEFINE_WRITEBACK_EVENT(writeback_bdi_unregister);