net_sched: remove unused tcf_idr_check()

[linux.git] / net / socket.c

diff --git a/net/socket.c b/net/socket.c
index 792f0313ea9171971ffdea3bcae7893b18fad9ae..e6945e318f0285441c0095903e099cb272fa78ec 100644 (file)
--- a/net/socket.c
+++ b/net/socket.c
@@ -252,7 +252,7 @@ static struct inode *sock_alloc_inode(struct super_block *sb)
        init_waitqueue_head(&wq->wait);
        wq->fasync_list = NULL;
        wq->flags = 0;
-       RCU_INIT_POINTER(ei->socket.wq, wq);
+       ei->socket.wq = wq;
 
        ei->socket.state = SS_UNCONNECTED;
        ei->socket.flags = 0;
@@ -266,11 +266,9 @@ static struct inode *sock_alloc_inode(struct super_block *sb)
 static void sock_destroy_inode(struct inode *inode)
 {
        struct socket_alloc *ei;
-       struct socket_wq *wq;
 
        ei = container_of(inode, struct socket_alloc, vfs_inode);
-       wq = rcu_dereference_protected(ei->socket.wq, 1);
-       kfree_rcu(wq, rcu);
+       kfree_rcu(ei->socket.wq, rcu);
        kmem_cache_free(sock_inode_cachep, ei);
 }
 
@@ -585,7 +583,7 @@ static void __sock_release(struct socket *sock, struct inode *inode)
                module_put(owner);
        }
 
-       if (rcu_dereference_protected(sock->wq, 1)->fasync_list)
+       if (sock->wq->fasync_list)
                pr_err("%s: fasync list not empty!\n", __func__);
 
        if (!sock->file) {
@@ -1112,12 +1110,21 @@ EXPORT_SYMBOL(sock_create_lite);
 static __poll_t sock_poll(struct file *file, poll_table *wait)
 {
        struct socket *sock = file->private_data;
-       __poll_t events = poll_requested_events(wait);
+       __poll_t events = poll_requested_events(wait), flag = 0;
 
-       sock_poll_busy_loop(sock, events);
        if (!sock->ops->poll)
                return 0;
-       return sock->ops->poll(file, sock, wait) | sock_poll_busy_flag(sock);
+
+       if (sk_can_busy_loop(sock->sk)) {
+               /* poll once if requested by the syscall */
+               if (events & POLL_BUSY_LOOP)
+                       sk_busy_loop(sock->sk, 1);
+
+               /* if this socket can poll_ll, tell the system call */
+               flag = POLL_BUSY_LOOP;
+       }
+
+       return sock->ops->poll(file, sock, wait) | flag;
 }
 
 static int sock_mmap(struct file *file, struct vm_area_struct *vma)
@@ -1154,7 +1161,7 @@ static int sock_fasync(int fd, struct file *filp, int on)
                return -EINVAL;
 
        lock_sock(sk);
-       wq = rcu_dereference_protected(sock->wq, lockdep_sock_is_held(sk));
+       wq = sock->wq;
        fasync_helper(fd, filp, on, &wq->fasync_list);
 
        if (!wq->fasync_list)
@@ -2671,8 +2678,7 @@ EXPORT_SYMBOL(sock_unregister);
 
 bool sock_is_registered(int family)
 {
-       return family < NPROTO &&
-               rcu_access_pointer(net_families[array_index_nospec(family, NPROTO)]);
+       return family < NPROTO && rcu_access_pointer(net_families[family]);
 }
 
 static int __init sock_init(void)