net: merge cases where sock_efree and sock_edemux are the same function

Since sock_efree and sock_demux are essentially the same code for non-TCP
sockets and the case where CONFIG_INET is not defined we can combine the
code or replace the call to sock_edemux in several spots.  As a result we
can avoid a bit of unnecessary code or code duplication.

Signed-off-by: Alexander Duyck <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: Alexander Duyck

include/net/sock.h

@@ -1575,7 +1575,11 @@ void sock_wfree(struct sk_buff *skb);
 void skb_orphan_partial(struct sk_buff *skb);
 void sock_rfree(struct sk_buff *skb);
 void sock_efree(struct sk_buff *skb);
+#ifdef CONFIG_INET
 void sock_edemux(struct sk_buff *skb);
+#else
+#define sock_edemux(skb) sock_efree(skb)
+#endif
 
 int sock_setsockopt(struct socket *sock, int level, int op,
 		    char __user *optval, unsigned int optlen);

net/core/sock.c

@@ -1643,18 +1643,18 @@ void sock_efree(struct sk_buff *skb)
 }
 EXPORT_SYMBOL(sock_efree);
 
+#ifdef CONFIG_INET
 void sock_edemux(struct sk_buff *skb)
 {
 	struct sock *sk = skb->sk;
 
-#ifdef CONFIG_INET
 	if (sk->sk_state == TCP_TIME_WAIT)
 		inet_twsk_put(inet_twsk(sk));
 	else
-#endif
 		sock_put(sk);
 }
 EXPORT_SYMBOL(sock_edemux);
+#endif
 
 kuid_t sock_i_uid(struct sock *sk)
 {

net/ipv4/udp.c

@@ -1972,7 +1972,7 @@ void udp_v4_early_demux(struct sk_buff *skb)
 		return;
 
 	skb->sk = sk;
-	skb->destructor = sock_edemux;
+	skb->destructor = sock_efree;
 	dst = sk->sk_rx_dst;
 
 	if (dst)