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authorChristoph Hellwig <hch@lst.de>2018-01-09 16:07:34 +0100
committerChristoph Hellwig <hch@lst.de>2018-05-26 09:16:44 +0200
commit3cafb37633a1230011c5415e6f394b05260d21ad (patch)
tree4bb789ef23b3e6e8a9ed3295a1a1ddb674dd250d /net/socket.c
parentaio: try to complete poll iocbs without context switch (diff)
downloadlinux-3cafb37633a1230011c5415e6f394b05260d21ad.tar.xz
linux-3cafb37633a1230011c5415e6f394b05260d21ad.zip
net: refactor socket_poll
Factor out two busy poll related helpers for late reuse, and remove a command that isn't very helpful, especially with the __poll_t annotations in place. Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'net/socket.c')
-rw-r--r--net/socket.c21
1 files changed, 4 insertions, 17 deletions
diff --git a/net/socket.c b/net/socket.c
index f10f1d947c78..571ee4005192 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -1117,24 +1117,11 @@ EXPORT_SYMBOL(sock_create_lite);
/* No kernel lock held - perfect */
static __poll_t sock_poll(struct file *file, poll_table *wait)
{
- __poll_t busy_flag = 0;
- struct socket *sock;
-
- /*
- * We can't return errors to poll, so it's either yes or no.
- */
- sock = file->private_data;
-
- if (sk_can_busy_loop(sock->sk)) {
- /* this socket can poll_ll so tell the system call */
- busy_flag = POLL_BUSY_LOOP;
-
- /* once, only if requested by syscall */
- if (wait && (wait->_key & POLL_BUSY_LOOP))
- sk_busy_loop(sock->sk, 1);
- }
+ struct socket *sock = file->private_data;
+ __poll_t events = poll_requested_events(wait);
- return busy_flag | sock->ops->poll(file, sock, wait);
+ sock_poll_busy_loop(sock, events);
+ return sock->ops->poll(file, sock, wait) | sock_poll_busy_flag(sock);
}
static int sock_mmap(struct file *file, struct vm_area_struct *vma)