net/af_iucv: clean up some forward declarations

The forward declarations for the iucv_handler callbacks are causing
various compile warnings with gcc-11. Reshuffle the code to get rid
of these prototypes.
Reported-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/iucv/af_iucv.c

@@ -44,6 +44,7 @@ static struct proto iucv_proto = {
 };
 
 static struct iucv_interface *pr_iucv;
+static struct iucv_handler af_iucv_handler;
 
 /* special AF_IUCV IPRM messages */
 static const u8 iprm_shutdown[8] =
@@ -91,28 +92,11 @@ static void iucv_sock_close(struct sock *sk);
 
 static void afiucv_hs_callback_txnotify(struct sock *sk, enum iucv_tx_notify);
 
-/* Call Back functions */
-static void iucv_callback_rx(struct iucv_path *, struct iucv_message *);
-static void iucv_callback_txdone(struct iucv_path *, struct iucv_message *);
-static void iucv_callback_connack(struct iucv_path *, u8 *);
-static int iucv_callback_connreq(struct iucv_path *, u8 *, u8 *);
-static void iucv_callback_connrej(struct iucv_path *, u8 *);
-static void iucv_callback_shutdown(struct iucv_path *, u8 *);
-
 static struct iucv_sock_list iucv_sk_list = {
 	.lock = __RW_LOCK_UNLOCKED(iucv_sk_list.lock),
 	.autobind_name = ATOMIC_INIT(0)
 };
 
-static struct iucv_handler af_iucv_handler = {
-	.path_pending	  = iucv_callback_connreq,
-	.path_complete	  = iucv_callback_connack,
-	.path_severed	  = iucv_callback_connrej,
-	.message_pending  = iucv_callback_rx,
-	.message_complete = iucv_callback_txdone,
-	.path_quiesced	  = iucv_callback_shutdown,
-};
-
 static inline void high_nmcpy(unsigned char *dst, char *src)
 {
        memcpy(dst, src, 8);
@@ -1817,6 +1801,15 @@ static void iucv_callback_shutdown(struct iucv_path *path, u8 ipuser[16])
 	bh_unlock_sock(sk);
 }
 
+static struct iucv_handler af_iucv_handler = {
+	.path_pending		= iucv_callback_connreq,
+	.path_complete		= iucv_callback_connack,
+	.path_severed		= iucv_callback_connrej,
+	.message_pending	= iucv_callback_rx,
+	.message_complete	= iucv_callback_txdone,
+	.path_quiesced		= iucv_callback_shutdown,
+};
+
 /***************** HiperSockets transport callbacks ********************/
 static void afiucv_swap_src_dest(struct sk_buff *skb)
 {