netdev - [PATCH net-next] ipv6: optimize inet6_hash

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Date:	Fri, 15 Feb 2013 20:14:48 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev <netdev@...r.kernel.org>
Subject: [PATCH net-next] ipv6: optimize inet6_hash_frag()

From: Eric Dumazet <edumazet@...gle.com>

Use ipv6_addr_hash() and a single jhash invocation.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 net/ipv6/reassembly.c |   15 +--------------
 1 file changed, 1 insertion(+), 14 deletions(-)

diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index e354743..9a6428a 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -79,20 +79,7 @@ unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
 {
 	u32 c;
 
-	c = jhash_3words((__force u32)saddr->s6_addr32[0],
-			 (__force u32)saddr->s6_addr32[1],
-			 (__force u32)saddr->s6_addr32[2],
-			 rnd);
-
-	c = jhash_3words((__force u32)saddr->s6_addr32[3],
-			 (__force u32)daddr->s6_addr32[0],
-			 (__force u32)daddr->s6_addr32[1],
-			 c);
-
-	c =  jhash_3words((__force u32)daddr->s6_addr32[2],
-			  (__force u32)daddr->s6_addr32[3],
-			  (__force u32)id,
-			  c);
+	c = jhash_3words(ipv6_addr_hash(saddr), ipv6_addr_hash(daddr), id, rnd);
 
 	return c & (INETFRAGS_HASHSZ - 1);
 }


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