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authorChristoph Hellwig <hch@lst.de>2018-07-30 09:42:12 +0200
committerDavid S. Miller <davem@davemloft.net>2018-07-30 09:10:25 -0700
commitf641f13b992979b97e595b761a9ba1a64fed7c4e (patch)
tree23ab66f8ce6811a02afb80d3bc0e71663e044a8a /net/socket.c
parentd8bbd13beeaacd6494954bf5b945b54ccb2af309 (diff)
downloadlinux-f641f13b992979b97e595b761a9ba1a64fed7c4e.tar.bz2
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>
Diffstat (limited to 'net/socket.c')
-rw-r--r--net/socket.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/net/socket.c b/net/socket.c
index 85633622c94d..674434127b3a 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);
}