netfilter: nfnetlink: constify message attributes and headers

Signed-off-by: Patrick McHardy <kaber@trash.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/net/netfilter/nf_nat_core.h b/include/net/netfilter/nf_nat_core.h
index 58684066388c..33602ab66190 100644
--- a/include/net/netfilter/nf_nat_core.h
+++ b/include/net/netfilter/nf_nat_core.h
@@ -31,6 +31,6 @@ struct nlattr;
 extern int
 (*nfnetlink_parse_nat_setup_hook)(struct nf_conn *ct,
                                   enum nf_nat_manip_type manip,
-                                  struct nlattr *attr);
+                                  const struct nlattr *attr);
 
 #endif /* _NF_NAT_CORE_H */