Name
sk_wait_data —
wait for data to arrive at sk_receive_queue
Synopsis
int sk_wait_data (struct sock * sk, long * timeo);
Arguments
sk
sock to wait on
timeo
for how long
Description
Now socket state including sk->sk_err is changed only under lock,
hence we may omit checks after joining wait queue.
We check receive queue before schedule only as optimization;
it is very likely that release_sock added new data.