[NETFILTER]: annotate xtables targets with const and remove casts

Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>

3 files changed, 6 insertions, 3 deletions

diff --git a/net/ipv6/netfilter/ip6t_REJECT.c b/net/ipv6/netfilter/ip6t_REJECT.c
index baf829075f6f..44c8d65a2431 100644
--- a/net/ipv6/netfilter/ip6t_REJECT.c
+++ b/net/ipv6/netfilter/ip6t_REJECT.c
@@ -41,7 +41,8 @@ static void send_reset(struct sk_buff *oldskb)
         struct tcphdr otcph, *tcph;
         unsigned int otcplen, hh_len;
         int tcphoff, needs_ack;
-        struct ipv6hdr *oip6h = ipv6_hdr(oldskb), *ip6h;
+        const struct ipv6hdr *oip6h = ipv6_hdr(oldskb);
+        struct ipv6hdr *ip6h;
         struct dst_entry *dst = NULL;
         u8 proto;
         struct flowi fl;
diff --git a/net/ipv6/netfilter/ip6t_ipv6header.c b/net/ipv6/netfilter/ip6t_ipv6header.c
index 3a940171f829..317a8960a757 100644
--- a/net/ipv6/netfilter/ip6t_ipv6header.c
+++ b/net/ipv6/netfilter/ip6t_ipv6header.c
@@ -49,7 +49,8 @@ ipv6header_mt6(const struct sk_buff *skb, const struct net_device *in,
         temp = 0;
 
         while (ip6t_ext_hdr(nexthdr)) {
-                struct ipv6_opt_hdr _hdr, *hp;
+                const struct ipv6_opt_hdr *hp;
+                struct ipv6_opt_hdr _hdr;
                 int hdrlen;
 
                 /* Is there enough space for the next ext header? */
diff --git a/net/ipv6/netfilter/ip6t_rt.c b/net/ipv6/netfilter/ip6t_rt.c
index 12a9efe9886e..81aaf7aaaabf 100644
--- a/net/ipv6/netfilter/ip6t_rt.c
+++ b/net/ipv6/netfilter/ip6t_rt.c
@@ -110,7 +110,8 @@ rt_mt6(const struct sk_buff *skb, const struct net_device *in,
                 !!(rtinfo->invflags & IP6T_RT_INV_TYP)));
 
         if (ret && (rtinfo->flags & IP6T_RT_RES)) {
-                u_int32_t *rp, _reserved;
+                const u_int32_t *rp;
+                u_int32_t _reserved;
                 rp = skb_header_pointer(skb,
                                         ptr + offsetof(struct rt0_hdr,
                                                        reserved),