inet: constify ip headers and in6_addr

Add const qualifiers to structs iphdr, ipv6hdr and in6_addr pointers
where possible, to make code intention more obvious.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 3 deletions

diff --git a/net/ipv6/xfrm6_mode_tunnel.c b/net/ipv6/xfrm6_mode_tunnel.c
index 645cb968d450..4d6edff0498f 100644
--- a/net/ipv6/xfrm6_mode_tunnel.c
+++ b/net/ipv6/xfrm6_mode_tunnel.c
@@ -20,7 +20,7 @@
 
 static inline void ipip6_ecn_decapsulate(struct sk_buff *skb)
 {
-        struct ipv6hdr *outer_iph = ipv6_hdr(skb);
+        const struct ipv6hdr *outer_iph = ipv6_hdr(skb);
         struct ipv6hdr *inner_iph = ipipv6_hdr(skb);
 
         if (INET_ECN_is_ce(ipv6_get_dsfield(outer_iph)))
@@ -55,8 +55,8 @@ static int xfrm6_mode_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
                 dsfield &= ~INET_ECN_MASK;
         ipv6_change_dsfield(top_iph, 0, dsfield);
         top_iph->hop_limit = ip6_dst_hoplimit(dst->child);
-        ipv6_addr_copy(&top_iph->saddr, (struct in6_addr *)&x->props.saddr);
-        ipv6_addr_copy(&top_iph->daddr, (struct in6_addr *)&x->id.daddr);
+        ipv6_addr_copy(&top_iph->saddr, (const struct in6_addr *)&x->props.saddr);
+        ipv6_addr_copy(&top_iph->daddr, (const struct in6_addr *)&x->id.daddr);
         return 0;
 }