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net: use skb_queue_empty_lockless() in poll() handlers

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[ Upstream commit 3ef7cf57c7 ]

Many poll() handlers are lockless. Using skb_queue_empty_lockless()
instead of skb_queue_empty() is more appropriate.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Eric Dumazet 2019-10-23 22:44:50 -07:00 committed by Greg Kroah-Hartman
parent 399c602993
commit 8e7bea4359
13 changed files with 21 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/isdn/capi/capi.c
View File

@ -743,7 +743,7 @@ capi_poll(struct file *file, poll_table *wait)
poll_wait(file, &(cdev->recvwait), wait);
mask = POLLOUT | POLLWRNORM;
if (!skb_queue_empty(&cdev->recvqueue))
if (!skb_queue_empty_lockless(&cdev->recvqueue))
mask |= POLLIN | POLLRDNORM;
return mask;
}

2
net/atm/common.c
View File

@ -667,7 +667,7 @@ unsigned int vcc_poll(struct file *file, struct socket *sock, poll_table *wait)
mask |= POLLHUP;
/* readable? */
if (!skb_queue_empty(&sk->sk_receive_queue))
if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
mask |= POLLIN | POLLRDNORM;
/* writable? */

4
net/bluetooth/af_bluetooth.c
View File

@ -460,7 +460,7 @@ unsigned int bt_sock_poll(struct file *file, struct socket *sock,
if (sk->sk_state == BT_LISTEN)
return bt_accept_poll(sk);
if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
mask |= POLLERR |
(sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0);
@ -470,7 +470,7 @@ unsigned int bt_sock_poll(struct file *file, struct socket *sock,
if (sk->sk_shutdown == SHUTDOWN_MASK)
mask |= POLLHUP;
if (!skb_queue_empty(&sk->sk_receive_queue))
if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
mask |= POLLIN | POLLRDNORM;
if (sk->sk_state == BT_CLOSED)

2
net/caif/caif_socket.c
View File

@ -953,7 +953,7 @@ static unsigned int caif_poll(struct file *file,
mask |= POLLRDHUP;
/* readable? */
if (!skb_queue_empty(&sk->sk_receive_queue) ||
if (!skb_queue_empty_lockless(&sk->sk_receive_queue) ||
(sk->sk_shutdown & RCV_SHUTDOWN))
mask |= POLLIN | POLLRDNORM;

4
net/core/datagram.c
View File

@ -844,7 +844,7 @@ unsigned int datagram_poll(struct file *file, struct socket *sock,
mask = 0;
/* exceptional events? */
if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
mask |= POLLERR |
(sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0);
@ -854,7 +854,7 @@ unsigned int datagram_poll(struct file *file, struct socket *sock,
mask |= POLLHUP;
/* readable? */
if (!skb_queue_empty(&sk->sk_receive_queue))
if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
mask |= POLLIN | POLLRDNORM;
/* Connection-based need to check for termination and startup */

2
net/ipv4/tcp.c
View File

@ -574,7 +574,7 @@ unsigned int tcp_poll(struct file *file, struct socket *sock, poll_table *wait)
}
/* This barrier is coupled with smp_wmb() in tcp_reset() */
smp_rmb();
if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
mask |= POLLERR;
return mask;

2
net/ipv4/udp.c
View File

@ -2550,7 +2550,7 @@ unsigned int udp_poll(struct file *file, struct socket *sock, poll_table *wait)
unsigned int mask = datagram_poll(file, sock, wait);
struct sock *sk = sock->sk;
if (!skb_queue_empty(&udp_sk(sk)->reader_queue))
if (!skb_queue_empty_lockless(&udp_sk(sk)->reader_queue))
mask |= POLLIN | POLLRDNORM;
sock_rps_record_flow(sk);

4
net/nfc/llcp_sock.c
View File

@ -567,11 +567,11 @@ static unsigned int llcp_sock_poll(struct file *file, struct socket *sock,
if (sk->sk_state == LLCP_LISTEN)
return llcp_accept_poll(sk);
if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
mask |= POLLERR |
(sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0);
if (!skb_queue_empty(&sk->sk_receive_queue))
if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
mask |= POLLIN | POLLRDNORM;
if (sk->sk_state == LLCP_CLOSED)

4
net/phonet/socket.c
View File

@ -352,9 +352,9 @@ static unsigned int pn_socket_poll(struct file *file, struct socket *sock,
if (sk->sk_state == TCP_CLOSE)
return POLLERR;
if (!skb_queue_empty(&sk->sk_receive_queue))
if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
mask |= POLLIN | POLLRDNORM;
if (!skb_queue_empty(&pn->ctrlreq_queue))
if (!skb_queue_empty_lockless(&pn->ctrlreq_queue))
mask |= POLLPRI;
if (!mask && sk->sk_state == TCP_CLOSE_WAIT)
return POLLHUP;

4
net/sctp/socket.c
View File

@ -7371,7 +7371,7 @@ unsigned int sctp_poll(struct file *file, struct socket *sock, poll_table *wait)
mask = 0;
/* Is there any exceptional events? */
if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
mask |= POLLERR |
(sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0);
if (sk->sk_shutdown & RCV_SHUTDOWN)
@ -7380,7 +7380,7 @@ unsigned int sctp_poll(struct file *file, struct socket *sock, poll_table *wait)
mask |= POLLHUP;
/* Is it readable? Reconsider this code with TCP-style support. */
if (!skb_queue_empty(&sk->sk_receive_queue))
if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
mask |= POLLIN | POLLRDNORM;
/* The association is either gone or not ready. */

4
net/tipc/socket.c
View File

@ -714,14 +714,14 @@ static unsigned int tipc_poll(struct file *file, struct socket *sock,
/* fall thru' */
case TIPC_LISTEN:
case TIPC_CONNECTING:
if (!skb_queue_empty(&sk->sk_receive_queue))
if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
mask |= (POLLIN | POLLRDNORM);
break;
case TIPC_OPEN:
if (!tsk->cong_link_cnt)
mask |= POLLOUT;
if (tipc_sk_type_connectionless(sk) &&
(!skb_queue_empty(&sk->sk_receive_queue)))
(!skb_queue_empty_lockless(&sk->sk_receive_queue)))
mask |= (POLLIN | POLLRDNORM);
break;
case TIPC_DISCONNECTING:

6
net/unix/af_unix.c
View File

@ -2665,7 +2665,7 @@ static unsigned int unix_poll(struct file *file, struct socket *sock, poll_table
mask |= POLLRDHUP | POLLIN | POLLRDNORM;
/* readable? */
if (!skb_queue_empty(&sk->sk_receive_queue))
if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
mask |= POLLIN | POLLRDNORM;
/* Connection-based need to check for termination and startup */
@ -2693,7 +2693,7 @@ static unsigned int unix_dgram_poll(struct file *file, struct socket *sock,
mask = 0;
/* exceptional events? */
if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
mask |= POLLERR |
(sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0);
@ -2703,7 +2703,7 @@ static unsigned int unix_dgram_poll(struct file *file, struct socket *sock,
mask |= POLLHUP;
/* readable? */
if (!skb_queue_empty(&sk->sk_receive_queue))
if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
mask |= POLLIN | POLLRDNORM;
/* Connection-based need to check for termination and startup */

2
net/vmw_vsock/af_vsock.c
View File

@ -880,7 +880,7 @@ static unsigned int vsock_poll(struct file *file, struct socket *sock,
* the queue and write as long as the socket isn't shutdown for
* sending.
*/
if (!skb_queue_empty(&sk->sk_receive_queue) ||
if (!skb_queue_empty_lockless(&sk->sk_receive_queue) ||
(sk->sk_shutdown & RCV_SHUTDOWN)) {
mask |= POLLIN | POLLRDNORM;
}