net: sk_sleep() helper

Define a new function to return the waitqueue of a "struct sock".

static inline wait_queue_head_t *sk_sleep(struct sock *sk)
{
	return sk->sk_sleep;
}

Change all read occurrences of sk_sleep by a call to this function.

Needed for a future RCU conversion. sk_sleep wont be a field directly
available.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 10 insertions, 10 deletions

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index c1941276f6e3..f34adcca8a8c 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -5702,7 +5702,7 @@ unsigned int sctp_poll(struct file *file, struct socket *sock, poll_table *wait)
         struct sctp_sock *sp = sctp_sk(sk);
         unsigned int mask;
 
-        poll_wait(file, sk->sk_sleep, wait);
+        poll_wait(file, sk_sleep(sk), wait);
 
         /* A TCP-style listening socket becomes readable when the accept queue
          * is not empty.
@@ -5943,7 +5943,7 @@ static int sctp_wait_for_packet(struct sock * sk, int *err, long *timeo_p)
         int error;
         DEFINE_WAIT(wait);
 
-        prepare_to_wait_exclusive(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+        prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 
         /* Socket errors? */
         error = sock_error(sk);
@@ -5980,14 +5980,14 @@ static int sctp_wait_for_packet(struct sock * sk, int *err, long *timeo_p)
         sctp_lock_sock(sk);
 
 ready:
-        finish_wait(sk->sk_sleep, &wait);
+        finish_wait(sk_sleep(sk), &wait);
         return 0;
 
 interrupted:
         error = sock_intr_errno(*timeo_p);
 
 out:
-        finish_wait(sk->sk_sleep, &wait);
+        finish_wait(sk_sleep(sk), &wait);
         *err = error;
         return error;
 }
@@ -6061,8 +6061,8 @@ static void __sctp_write_space(struct sctp_association *asoc)
                         wake_up_interruptible(&asoc->wait);
 
                 if (sctp_writeable(sk)) {
-                        if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
-                                wake_up_interruptible(sk->sk_sleep);
+                        if (sk_sleep(sk) && waitqueue_active(sk_sleep(sk)))
+                                wake_up_interruptible(sk_sleep(sk));
 
                         /* Note that we try to include the Async I/O support
                          * here by modeling from the current TCP/UDP code.
@@ -6296,7 +6296,7 @@ static int sctp_wait_for_accept(struct sock *sk, long timeo)
 
 
         for (;;) {
-                prepare_to_wait_exclusive(sk->sk_sleep, &wait,
+                prepare_to_wait_exclusive(sk_sleep(sk), &wait,
                                           TASK_INTERRUPTIBLE);
 
                 if (list_empty(&ep->asocs)) {
@@ -6322,7 +6322,7 @@ static int sctp_wait_for_accept(struct sock *sk, long timeo)
                         break;
         }
 
-        finish_wait(sk->sk_sleep, &wait);
+        finish_wait(sk_sleep(sk), &wait);
 
         return err;
 }
@@ -6332,7 +6332,7 @@ static void sctp_wait_for_close(struct sock *sk, long timeout)
         DEFINE_WAIT(wait);
 
         do {
-                prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+                prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
                 if (list_empty(&sctp_sk(sk)->ep->asocs))
                         break;
                 sctp_release_sock(sk);
@@ -6340,7 +6340,7 @@ static void sctp_wait_for_close(struct sock *sk, long timeout)
                 sctp_lock_sock(sk);
         } while (!signal_pending(current) && timeout);
 
-        finish_wait(sk->sk_sleep, &wait);
+        finish_wait(sk_sleep(sk), &wait);
 }
 
 static void sctp_skb_set_owner_r_frag(struct sk_buff *skb, struct sock *sk)