ipv4: compilation error fix with CONFIG_PROC_FS disabled

Fixes compilation errors while compiling the kernel with CONFIG_PROC_FS disabled.

---
 net/ipv4/fib_frontend.c |    7 +++++++
 1 file changed, 7 insertions(+)

Index: linux-2.6.24/net/ipv4/fib_frontend.c
===================================================================
@@ -1029,14 +1029,19 @@ static int __net_init fib_net_init(struc
 	error = nl_fib_lookup_init(net);
 	if (error < 0)
 		goto out_nlfl;
+#ifdef CONFIG_PROC_FS
 	error = fib_proc_init(net);
 	if (error < 0)
 		goto out_proc;
+#endif /* CONFIG_PROC_FS */
 out:
 	return error;
 
+#ifdef CONFIG_PROC_FS
 out_proc:
 	nl_fib_lookup_exit(net);
+#endif /* CONFIG_PROC_FS */
+
 out_nlfl:
 	ip_fib_net_exit(net);
 	goto out;

@@ -1044,7 +1049,9 @@ out_nlfl:
 
 static void __net_exit fib_net_exit(struct net *net)
 {
+#ifdef CONFIG_PROC_FS
 	fib_proc_exit(net);
+#endif /* CONFIG_PROC_FS */
 	nl_fib_lookup_exit(net);
 	ip_fib_net_exit(net);
 }

Please always include the compiler message when fixing compilation warnings or errors.

This one is already fixed differently in current -git:

commit cc8274f50f2ad9a97a837451f63a0a3e65f7f490

Author: Li Zefan <[email protected]>
Date:   Tue Feb 5 02:54:16 2008 -0800

[IPV4]: Fix compile error building without CONFIG_FS_PROC

compile error building without CONFIG_FS_PROC:

net/ipv4/fib_frontend.c: In function 'fib_net_init':
net/ipv4/fib_frontend.c:1032: error: implicit declaration of function 'fib_proc_ init'
net/ipv4/fib_frontend.c: In function 'fib_net_exit':
net/ipv4/fib_frontend.c:1047: error: implicit declaration of function 'fib_proc_ exit'

index 90d1175..8b12667 100644
@@ -266,6 +266,14 @@ static inline void fib_res_put(struct fib_result *res)
 #ifdef CONFIG_PROC_FS
 extern int __net_init  fib_proc_init(struct net *net);
 extern void __net_exit fib_proc_exit(struct net *net);
+#else
+static inline int fib_proc_init(struct net *net)
+{
+	return 0;
+}
+static inline void fib_proc_exit(struct net *net)
+{
+}
 #endif
 
 #endif  /* _NET_FIB_H */

From: Ram Pai <[email protected]>
Date: Mon, 10 Mar 2008 11:11:03 -0700

In the current tree, fib_proc_{init,exit}() are delcared as do-nothing inline functions in include/net/ip_fib.h

That was made by the following 2.6.25 changeset, which I'll queue up for 2.6.24-stable if necessary.

commit cc8274f50f2ad9a97a837451f63a0a3e65f7f490

Author: Li Zefan <[email protected]>
Date:   Tue Feb 5 02:54:16 2008 -0800

[IPV4]: Fix compile error building without CONFIG_FS_PROC

compile error building without CONFIG_FS_PROC:

net/ipv4/fib_frontend.c: In function 'fib_net_init':
net/ipv4/fib_frontend.c:1032: error: implicit declaration of function 'fib_proc_ init'
net/ipv4/fib_frontend.c: In function 'fib_net_exit':
net/ipv4/fib_frontend.c:1047: error: implicit declaration of function 'fib_proc_ exit'

index 90d1175..8b12667 100644
@@ -266,6 +266,14 @@ static inline void fib_res_put(struct fib_result *res)
 #ifdef CONFIG_PROC_FS
 extern int __net_init  fib_proc_init(struct net *net);
 extern void __net_exit fib_proc_exit(struct net *net);
+#else
+static inline int fib_proc_init(struct net *net)
+{
+	return 0;
+}
+static inline void fib_proc_exit(struct net *net)
+{
+}
 #endif
 
 #endif  /* _NET_FIB_H */