__tracefs_write
__tracefs_write(TRACEFS_ROOT"/events/sched/sched_switch/trigger",
ASSERT_EQ(__tracefs_write(TRACEFS_ROOT"/events/sched/sched_switch/trigger",
ASSERT_EQ(__tracefs_write(TRACEFS_ROOT"/snapshot",
ret = __tracefs_write(path, str);
ASSERT_EQ(__tracefs_write((path), (value)), 0)
if (__tracefs_write(TRACEFS_ROOT"/trace", ""))
if (__tracefs_write(TRACEFS_ROOT"/set_event", ""))
if (__tracefs_write(TRACEFS_ROOT"/current_tracer", "nop"))