diff options
| author | Ingo Molnar <mingo@kernel.org> | 2013-07-23 11:48:17 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-07-23 11:48:17 +0200 |
| commit | b59f2b4d30c187160df597bae41cabe497b6acf4 (patch) | |
| tree | e29ed9e3cbaf777cc1a10c99c4542985002d2c88 /net/socket.c | |
| parent | 1e40c2edef2537f87f94d0baf80aeaeb7d51cc23 (diff) | |
| parent | 3b2f64d00c46e1e4e9bd0bb9bb12619adac27a4b (diff) | |
Merge tag 'v3.11-rc2' into core/locking
Merge in Linux 3.11-rc2 before moving on with new work.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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 4ca1526db756..829b460acb87 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_LL_RX_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 |