__var_waitqueue
wait_queue_head_t *wq = __var_waitqueue(&whole->bd_claiming);
add_wait_queue(__var_waitqueue(ref), &wb->base);
return __var_waitqueue(bit_address);
extern wait_queue_head_t *__var_waitqueue(void *p);
struct wait_queue_head *__wq_head = __var_waitqueue(var); \
EXPORT_SYMBOL(__var_waitqueue);
__wake_up_bit(__var_waitqueue(var), var, -1);