From: Eric Dumazet <edumazet@google.com>
Date: Mon, 4 Nov 2019 02:24:16 +0000 (-0800)
Subject: ipv6: use jhash2() in rt6_exception_hash()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b6b556afd21b48a372be8ed0c0f79428022e1b7c;p=linux.git

ipv6: use jhash2() in rt6_exception_hash()

Faster jhash2() can be used instead of jhash(), since
IPv6 addresses have the needed alignment requirement.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index a63ff85fe1419..c7a2022e64eb9 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1475,11 +1475,11 @@ static u32 rt6_exception_hash(const struct in6_addr *dst,
 	u32 val;
 
 	net_get_random_once(&seed, sizeof(seed));
-	val = jhash(dst, sizeof(*dst), seed);
+	val = jhash2((const u32 *)dst, sizeof(*dst)/sizeof(u32), seed);
 
 #ifdef CONFIG_IPV6_SUBTREES
 	if (src)
-		val = jhash(src, sizeof(*src), val);
+		val = jhash2((const u32 *)src, sizeof(*src)/sizeof(u32), val);
 #endif
 	return hash_32(val, FIB6_EXCEPTION_BUCKET_SIZE_SHIFT);
 }