netfilter: nat: make symbol nat_hook static

Fixes the following sparse warning:

net/netfilter/nf_nat_core.c:1039:20: warning:
 symbol 'nat_hook' was not declared. Should it be static?

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/netfilter/nf_nat_core.c b/net/netfilter/nf_nat_core.c
index 821f8d8..b7df32a 100644 (file)
--- a/net/netfilter/nf_nat_core.c
+++ b/net/netfilter/nf_nat_core.c
@@ -1036,7 +1036,7 @@ static struct pernet_operations nat_net_ops = {
        .size = sizeof(struct nat_net),
 };
 
-struct nf_nat_hook nat_hook = {
+static struct nf_nat_hook nat_hook = {
        .parse_nat_setup        = nfnetlink_parse_nat_setup,
 #ifdef CONFIG_XFRM
        .decode_session         = __nf_nat_decode_session,