net: remove sock_poll_busy_loop
There is no point in hiding this logic in a helper. Also remove the
useless events != 0 check and only busy loop once we know we actually
have a poll method.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/socket.c b/net/socket.c
index 8563362..6744341 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -1132,9 +1132,12 @@ static __poll_t sock_poll(struct file *file, poll_table *wait)
struct socket *sock = file->private_data;
__poll_t events = poll_requested_events(wait);
- sock_poll_busy_loop(sock, events);
if (!sock->ops->poll)
return 0;
+
+ /* poll once if requested by the syscall */
+ if (sk_can_busy_loop(sock->sk) && (events & POLL_BUSY_LOOP))
+ sk_busy_loop(sock->sk, 1);
return sock->ops->poll(file, sock, wait) | sock_poll_busy_flag(sock);
}