rpc_wake_up_first
if (rpc_wake_up_first(&tbl->slot_tbl_waitq, nfs41_assign_slot, slot))
struct rpc_task *rpc_wake_up_first(struct rpc_wait_queue *,
EXPORT_SYMBOL_GPL(rpc_wake_up_first);
return rpc_wake_up_first(queue, rpc_wake_up_next_func, NULL);
if (rpc_wake_up_first(&xprt->backlog, __xprt_set_rq, req) == NULL) {