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>

2 files changed, 4 insertions, 4 deletions

diff --git a/net/dccp/output.c b/net/dccp/output.c
index e98b65e9569f..2d3dcb39851f 100644
--- a/net/dccp/output.c
+++ b/net/dccp/output.c
@@ -198,7 +198,7 @@ void dccp_write_space(struct sock *sk)
         read_lock(&sk->sk_callback_lock);
 
         if (sk_has_sleeper(sk))
-                wake_up_interruptible(sk->sk_sleep);
+                wake_up_interruptible(sk_sleep(sk));
         /* Should agree with poll, otherwise some programs break */
         if (sock_writeable(sk))
                 sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
@@ -225,7 +225,7 @@ static int dccp_wait_for_ccid(struct sock *sk, struct sk_buff *skb, int delay)
                 dccp_pr_debug("delayed send by %d msec\n", delay);
                 jiffdelay = msecs_to_jiffies(delay);
 
-                prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+                prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 
                 sk->sk_write_pending++;
                 release_sock(sk);
@@ -241,7 +241,7 @@ static int dccp_wait_for_ccid(struct sock *sk, struct sk_buff *skb, int delay)
                 rc = ccid_hc_tx_send_packet(dp->dccps_hc_tx_ccid, sk, skb);
         } while ((delay = rc) > 0);
 out:
-        finish_wait(sk->sk_sleep, &wait);
+        finish_wait(sk_sleep(sk), &wait);
         return rc;
 
 do_error:
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index a0e38d8018f5..b03ecf6b2bb0 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -312,7 +312,7 @@ unsigned int dccp_poll(struct file *file, struct socket *sock,
         unsigned int mask;
         struct sock *sk = sock->sk;
 
-        sock_poll_wait(file, sk->sk_sleep, wait);
+        sock_poll_wait(file, sk_sleep(sk), wait);
         if (sk->sk_state == DCCP_LISTEN)
                 return inet_csk_listen_poll(sk);