usleep_range_state
usleep_range_state(wait_in_micro_secs, wait_in_micro_secs, TASK_UNINTERRUPTIBLE);
void usleep_range_state(unsigned long min, unsigned long max,
usleep_range_state(min, max, TASK_UNINTERRUPTIBLE);
usleep_range_state(min, max, TASK_IDLE);
EXPORT_SYMBOL(usleep_range_state);