From: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Date: Mon, 22 Oct 2012 23:35:06 +0000 (+0000)
Subject: ipv6: fix sparse warnings in rt6_info_hash_nhsfn()
X-Git-Tag: master-2012-12-14~5^2~578
X-Git-Url: http://pileus.org/git/?p=~andy%2Flinux;a=commitdiff_plain;h=b3ce5ae1fb6ba45c70e7c4d144182d38f0b0aef7

ipv6: fix sparse warnings in rt6_info_hash_nhsfn()

Adding by commit 51ebd3181572 which adds the support of ECMP for IPv6.

Spotted-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 126da562d3e..c42650cf8d4 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -397,32 +397,32 @@ static int rt6_info_hash_nhsfn(unsigned int candidate_count,
 {
 	unsigned int val = fl6->flowi6_proto;
 
-	val ^= fl6->daddr.s6_addr32[0];
-	val ^= fl6->daddr.s6_addr32[1];
-	val ^= fl6->daddr.s6_addr32[2];
-	val ^= fl6->daddr.s6_addr32[3];
+	val ^= (__force u32)fl6->daddr.s6_addr32[0];
+	val ^= (__force u32)fl6->daddr.s6_addr32[1];
+	val ^= (__force u32)fl6->daddr.s6_addr32[2];
+	val ^= (__force u32)fl6->daddr.s6_addr32[3];
 
-	val ^= fl6->saddr.s6_addr32[0];
-	val ^= fl6->saddr.s6_addr32[1];
-	val ^= fl6->saddr.s6_addr32[2];
-	val ^= fl6->saddr.s6_addr32[3];
+	val ^= (__force u32)fl6->saddr.s6_addr32[0];
+	val ^= (__force u32)fl6->saddr.s6_addr32[1];
+	val ^= (__force u32)fl6->saddr.s6_addr32[2];
+	val ^= (__force u32)fl6->saddr.s6_addr32[3];
 
 	/* Work only if this not encapsulated */
 	switch (fl6->flowi6_proto) {
 	case IPPROTO_UDP:
 	case IPPROTO_TCP:
 	case IPPROTO_SCTP:
-		val ^= fl6->fl6_sport;
-		val ^= fl6->fl6_dport;
+		val ^= (__force u16)fl6->fl6_sport;
+		val ^= (__force u16)fl6->fl6_dport;
 		break;
 
 	case IPPROTO_ICMPV6:
-		val ^= fl6->fl6_icmp_type;
-		val ^= fl6->fl6_icmp_code;
+		val ^= (__force u16)fl6->fl6_icmp_type;
+		val ^= (__force u16)fl6->fl6_icmp_code;
 		break;
 	}
 	/* RFC6438 recommands to use flowlabel */
-	val ^= fl6->flowlabel;
+	val ^= (__force u32)fl6->flowlabel;
 
 	/* Perhaps, we need to tune, this function? */
 	val = val ^ (val >> 7) ^ (val >> 12);