mptcp: drop unused sk in mptcp_push_release

Since mptcp_set_timeout() had removed from mptcp_push_release() in
commit 33d41c9c ("mptcp: more accurate timeout"), the argument
sk in mptcp_push_release() became useless. Let's drop it.

Fixes: 33d41c9c ("mptcp: more accurate timeout")
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

net/mptcp/protocol.c

@@ -1469,8 +1469,7 @@ static struct sock *mptcp_subflow_get_send(struct mptcp_sock *msk)
 	return NULL;
 }
 
-static void mptcp_push_release(struct sock *sk, struct sock *ssk,
-			       struct mptcp_sendmsg_info *info)
+static void mptcp_push_release(struct sock *ssk, struct mptcp_sendmsg_info *info)
 {
 	tcp_push(ssk, 0, info->mss_now, tcp_sk(ssk)->nonagle, info->size_goal);
 	release_sock(ssk);
@@ -1533,7 +1532,7 @@ void __mptcp_push_pending(struct sock *sk, unsigned int flags)
 			 * the last round, release prev_ssk
 			 */
 			if (ssk != prev_ssk && prev_ssk)
-				mptcp_push_release(sk, prev_ssk, &info);
+				mptcp_push_release(prev_ssk, &info);
 			if (!ssk)
 				goto out;
 
@@ -1546,7 +1545,7 @@ void __mptcp_push_pending(struct sock *sk, unsigned int flags)
 
 			ret = mptcp_sendmsg_frag(sk, ssk, dfrag, &info);
 			if (ret <= 0) {
-				mptcp_push_release(sk, ssk, &info);
+				mptcp_push_release(ssk, &info);
 				goto out;
 			}
 
@@ -1561,7 +1560,7 @@ void __mptcp_push_pending(struct sock *sk, unsigned int flags)
 
 	/* at this point we held the socket lock for the last subflow we used */
 	if (ssk)
-		mptcp_push_release(sk, ssk, &info);
+		mptcp_push_release(ssk, &info);
 
 out:
 	/* ensure the rtx timer is running */