[NET]: Export sockfd_lookup.

include/linux/net.h

@@ -144,6 +144,9 @@ extern int	sock_readv_writev(int type, struct inode * inode, struct file * file,
 				  const struct iovec * iov, long count, long size);
 extern int 	sock_map_fd(struct socket *sock);
 
+extern struct socket *sockfd_lookup(int fd, int *err);
+#define         sockfd_put(sock) fput(sock->file)
+
 extern int	net_ratelimit(void);
 extern unsigned long net_random(void);
 extern void net_srandom(unsigned long);

net/netsyms.c

@@ -161,6 +161,7 @@ EXPORT_SYMBOL(put_cmsg);
 EXPORT_SYMBOL(sock_kmalloc);
 EXPORT_SYMBOL(sock_kfree_s);
 EXPORT_SYMBOL(sock_map_fd);
+EXPORT_SYMBOL(sockfd_lookup);
 
 #ifdef CONFIG_FILTER
 EXPORT_SYMBOL(sk_run_filter);

net/socket.c

@@ -447,11 +447,6 @@ struct socket *sockfd_lookup(int fd, int *err)
 	return sock;
 }
 
-extern __inline__ void sockfd_put(struct socket *sock)
-{
-	fput(sock->file);
-}
-
 /**
  *	sock_alloc	-	allocate a socket
  *