net: don not detour through struct sock to find the poll waitqueue
For any open socket file descriptor sock->sk->sk_wq->wait will always point to sock->wq->wait. That means we can do the shorter dereference and removal a NULL check and don't have to not worry about any RCU protection. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -2064,10 +2064,9 @@ static inline bool skwq_has_sleeper(struct socket_wq *wq)
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static inline void sock_poll_wait(struct file *filp, poll_table *p)
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static inline void sock_poll_wait(struct file *filp, poll_table *p)
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{
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{
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struct socket *sock = filp->private_data;
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struct socket *sock = filp->private_data;
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wait_queue_head_t *wq = sk_sleep(sock->sk);
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if (!poll_does_not_wait(p) && wq) {
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if (!poll_does_not_wait(p)) {
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poll_wait(filp, wq, p);
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poll_wait(filp, &sock->wq->wait, p);
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/* We need to be sure we are in sync with the
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/* We need to be sure we are in sync with the
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* socket flags modification.
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* socket flags modification.
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*
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*
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