[IPV4] fib_trie: fix proc interface

Create one iterator for walking over FIB trie, and use it
for all the /proc functions. Add a /proc/net/route
output for backwards compatibility with old applications.

Make initialization of fib_trie same as fib_hash so no #ifdef
is needed in af_inet.c

Fixes: http://bugzilla.kernel.org/show_bug.cgi?id=5209

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/af_inet.c

@@ -1248,11 +1248,6 @@ module_init(inet_init);
 /* ------------------------------------------------------------------------ */
 
 #ifdef CONFIG_PROC_FS
-#ifdef CONFIG_IP_FIB_TRIE
-extern int  fib_stat_proc_init(void);
-extern void fib_stat_proc_exit(void);
-#endif
-
 static int __init ipv4_proc_init(void)
 {
 	int rc = 0;
@@ -1265,19 +1260,11 @@ static int __init ipv4_proc_init(void)
 		goto out_udp;
 	if (fib_proc_init())
 		goto out_fib;
-#ifdef CONFIG_IP_FIB_TRIE
-         if (fib_stat_proc_init())
-                 goto out_fib_stat;
-#endif
 	if (ip_misc_proc_init())
 		goto out_misc;
 out:
 	return rc;
 out_misc:
-#ifdef CONFIG_IP_FIB_TRIE
- 	fib_stat_proc_exit();
-out_fib_stat:
-#endif
 	fib_proc_exit();
 out_fib:
 	udp4_proc_exit();