diff options
| author | Sage Weil <sage@inktank.com> | 2013-08-15 11:11:45 -0700 |
|---|---|---|
| committer | Sage Weil <sage@inktank.com> | 2013-08-15 11:11:45 -0700 |
| commit | ee3e542fec6e69bc9fb668698889a37d93950ddf (patch) | |
| tree | e74ee766a4764769ef1d3d45d266b4dea64101d3 /net/socket.c | |
| parent | fe2a801b50c0bb8039d627e5ae1fec249d10ff39 (diff) | |
| parent | f1d6e17f540af37bb1891480143669ba7636c4cf (diff) | |
Merge remote-tracking branch 'linus/master' into testing
Diffstat (limited to 'net/socket.c')
| -rw-r--r-- | net/socket.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/net/socket.c b/net/socket.c index 4ca1526db75..b2d7c629eeb 100644 --- a/net/socket.c +++ b/net/socket.c @@ -104,6 +104,12 @@ #include <linux/route.h> #include <linux/sockios.h> #include <linux/atalk.h> +#include <net/busy_poll.h> + +#ifdef CONFIG_NET_RX_BUSY_POLL +unsigned int sysctl_net_busy_read __read_mostly; +unsigned int sysctl_net_busy_poll __read_mostly; +#endif static int sock_no_open(struct inode *irrelevant, struct file *dontcare); static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, @@ -1142,13 +1148,24 @@ EXPORT_SYMBOL(sock_create_lite); /* No kernel lock held - perfect */ static unsigned int sock_poll(struct file *file, poll_table *wait) { + unsigned int busy_flag = 0; struct socket *sock; /* * We can't return errors to poll, so it's either yes or no. */ sock = file->private_data; - return sock->ops->poll(file, sock, wait); + + 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); + } + + return busy_flag | sock->ops->poll(file, sock, wait); } static int sock_mmap(struct file *file, struct vm_area_struct *vma) @@ -2635,7 +2652,9 @@ static int __init sock_init(void) */ #ifdef CONFIG_NETFILTER - netfilter_init(); + err = netfilter_init(); + if (err) + goto out; #endif #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING |