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, 2 insertions, 2 deletions

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 43265207d463..20a17938c62b 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -868,8 +868,8 @@ static void tun_sock_write_space(struct sock *sk)
         if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags))
                 return;
 
-        if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
-                wake_up_interruptible_sync_poll(sk->sk_sleep, POLLOUT |
+        if (sk_sleep(sk) && waitqueue_active(sk_sleep(sk)))
+                wake_up_interruptible_sync_poll(sk_sleep(sk), POLLOUT |
                                                 POLLWRNORM | POLLWRBAND);
 
         tun = tun_sk(sk)->tun;