[PATCH nf-next] nfilter: nf_hooks: fix build failure with NF_TABLES=n

[Florian Westphal <fw@strlen.de>]

nfnetlink_hook.c: In function 'nfnl_hook_put_nft_chain_info':
nfnetlink_hook.c:76:7: error: implicit declaration of 'nft_is_active'

This macro is only defined when NF_TABLES is enabled.
Add IS_ENABLED guards for this.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 252956528caa ("netfilter: add new hook nfnl subsystem")
Signed-off-by: Florian Westphal <fw@strlen.de>
---
 net/netfilter/nfnetlink_hook.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/net/netfilter/nfnetlink_hook.c b/net/netfilter/nfnetlink_hook.c
index 04586dfa2acd..d624805e977c 100644
--- a/net/netfilter/nfnetlink_hook.c
+++ b/net/netfilter/nfnetlink_hook.c
@@ -61,6 +61,7 @@ static int nfnl_hook_put_nft_chain_info(struct sk_buff *nlskb,
 					unsigned int seq,
 					const struct nf_hook_ops *ops)
 {
+#if IS_ENABLED(CONFIG_NF_TABLES)
 	struct net *net = sock_net(nlskb->sk);
 	struct nlattr *nest, *nest2;
 	struct nft_chain *chain;
@@ -104,6 +105,9 @@ static int nfnl_hook_put_nft_chain_info(struct sk_buff *nlskb,
 cancel_nest:
 	nla_nest_cancel(nlskb, nest);
 	return -EMSGSIZE;
+#else
+	return 0;
+#endif
 }
 
 static int nfnl_hook_dump_one(struct sk_buff *nlskb,
-- 
2.31.1