1 files changed, 4 insertions, 3 deletions

diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c
index 4286fd3cc0e2..c1f4154552fc 100644
--- a/net/ipv4/ah4.c
+++ b/net/ipv4/ah4.c
@@ -73,7 +73,7 @@ static inline struct scatterlist *ah_req_sg(struct crypto_ahash *ahash,
  * into IP header for icv calculation. Options are already checked
  * for validity, so paranoia is not required. */
 
-static int ip_clear_mutable_options(struct iphdr *iph, __be32 *daddr)
+static int ip_clear_mutable_options(const struct iphdr *iph, __be32 *daddr)
 {
         unsigned char * optptr = (unsigned char*)(iph+1);
         int  l = iph->ihl*4 - sizeof(struct iphdr);
@@ -396,7 +396,7 @@ out:
 static void ah4_err(struct sk_buff *skb, u32 info)
 {
         struct net *net = dev_net(skb->dev);
-        struct iphdr *iph = (struct iphdr *)skb->data;
+        const struct iphdr *iph = (const struct iphdr *)skb->data;
         struct ip_auth_hdr *ah = (struct ip_auth_hdr *)(skb->data+(iph->ihl<<2));
         struct xfrm_state *x;
 
@@ -404,7 +404,8 @@ static void ah4_err(struct sk_buff *skb, u32 info)
             icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
                 return;
 
-        x = xfrm_state_lookup(net, skb->mark, (xfrm_address_t *)&iph->daddr, ah->spi, IPPROTO_AH, AF_INET);
+        x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
+                              ah->spi, IPPROTO_AH, AF_INET);
         if (!x)
                 return;
         printk(KERN_DEBUG "pmtu discovery on SA AH/%08x/%08x\n",