ipv4: compat_ioctl is local to af_inet.c, make it static

ipv4: compat_ioctl is local to af_inet.c, make it static
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/af_inet.c

@@ -893,7 +893,7 @@ int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 EXPORT_SYMBOL(inet_ioctl);
 
 #ifdef CONFIG_COMPAT
-int inet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+static int inet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 {
 	struct sock *sk = sock->sk;
 	int err = -ENOIOCTLCMD;