1 files changed, 19 insertions, 0 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index ed9938014cf9..b17fafc56241 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -541,6 +541,25 @@ ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
         *ifap = ifp;
 }
 
+/*
+ *      Hash function taken from net_alias.c
+ */
+static u8 ipv6_addr_hash(const struct in6_addr *addr)
+{
+        __u32 word;
+
+        /*
+         * We perform the hash function over the last 64 bits of the address
+         * This will include the IEEE address token on links that support it.
+         */
+
+        word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
+        word ^= (word >> 16);
+        word ^= (word >> 8);
+
+        return ((word ^ (word >> 4)) & 0x0f);
+}
+
 /* On success it returns ifp with increased reference count */
 
 static struct inet6_ifaddr *