1 files changed, 16 insertions, 20 deletions

diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index c7ba3149633..7b954e2539d 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -104,26 +104,22 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
 unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
 			     const struct in6_addr *daddr, u32 rnd)
 {
-	u32 a, b, c;
+	u32 c;
 
-	a = (__force u32)saddr->s6_addr32[0];
-	b = (__force u32)saddr->s6_addr32[1];
-	c = (__force u32)saddr->s6_addr32[2];
+	c = jhash_3words((__force u32)saddr->s6_addr32[0],
+			 (__force u32)saddr->s6_addr32[1],
+			 (__force u32)saddr->s6_addr32[2],
+			 rnd);
 
-	a += JHASH_GOLDEN_RATIO;
-	b += JHASH_GOLDEN_RATIO;
-	c += rnd;
-	__jhash_mix(a, b, c);
+	c = jhash_3words((__force u32)saddr->s6_addr32[3],
+			 (__force u32)daddr->s6_addr32[0],
+			 (__force u32)daddr->s6_addr32[1],
+			 c);
 
-	a += (__force u32)saddr->s6_addr32[3];
-	b += (__force u32)daddr->s6_addr32[0];
-	c += (__force u32)daddr->s6_addr32[1];
-	__jhash_mix(a, b, c);
-
-	a += (__force u32)daddr->s6_addr32[2];
-	b += (__force u32)daddr->s6_addr32[3];
-	c += (__force u32)id;
-	__jhash_mix(a, b, c);
+	c =  jhash_3words((__force u32)daddr->s6_addr32[2],
+			  (__force u32)daddr->s6_addr32[3],
+			  (__force u32)id,
+			  c);
 
 	return c & (INETFRAGS_HASHSZ - 1);
 }
@@ -228,7 +224,7 @@ out:
 }
 
 static __inline__ struct frag_queue *
-fq_find(struct net *net, __be32 id, struct in6_addr *src, struct in6_addr *dst)
+fq_find(struct net *net, __be32 id, const struct in6_addr *src, const struct in6_addr *dst)
 {
 	struct inet_frag_queue *q;
 	struct ip6_create_arg arg;
@@ -349,7 +345,7 @@ found:
 
 	/* Check for overlap with preceding fragment. */
 	if (prev &&
-	    (FRAG6_CB(prev)->offset + prev->len) - offset > 0)
+	    (FRAG6_CB(prev)->offset + prev->len) > offset)
 		goto discard_fq;
 
 	/* Look for overlap with succeeding segment. */
@@ -539,7 +535,7 @@ static int ipv6_frag_rcv(struct sk_buff *skb)
 {
 	struct frag_hdr *fhdr;
 	struct frag_queue *fq;
-	struct ipv6hdr *hdr = ipv6_hdr(skb);
+	const struct ipv6hdr *hdr = ipv6_hdr(skb);
 	struct net *net = dev_net(skb_dst(skb)->dev);
 
 	IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_REASMREQDS);