__wait_on_bit
int __wait_on_bit(struct wait_queue_head *wq_head, struct wait_bit_queue_entry *wbq_entry, wait_bit_action_f *action, unsigned int mode);
EXPORT_SYMBOL(__wait_on_bit);
return __wait_on_bit(wq_head, &wq_entry, action, mode);
return __wait_on_bit(wq_head, &wq_entry, action, mode);