[RFC PATCH 2/4] netfilter: ip6t_NPT: Use csum_partial().

[YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>]

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
---
 net/ipv6/netfilter/ip6t_NPT.c |   11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/net/ipv6/netfilter/ip6t_NPT.c b/net/ipv6/netfilter/ip6t_NPT.c
index 3ff281b..b1bf3ed 100644
--- a/net/ipv6/netfilter/ip6t_NPT.c
+++ b/net/ipv6/netfilter/ip6t_NPT.c
@@ -17,18 +17,13 @@
 static int ip6t_npt_checkentry(const struct xt_tgchk_param *par)
 {
 	struct ip6t_npt_tginfo *npt = par->targinfo;
-	__wsum src_sum = 0, dst_sum = 0;
-	unsigned int i;
+	__wsum src_sum, dst_sum;
 
 	if (npt->src_pfx_len > 64 || npt->dst_pfx_len > 64)
 		return -EINVAL;
 
-	for (i = 0; i < ARRAY_SIZE(npt->src_pfx.in6.s6_addr16); i++) {
-		src_sum = csum_add(src_sum,
-				(__force __wsum)npt->src_pfx.in6.s6_addr16[i]);
-		dst_sum = csum_add(dst_sum,
-				(__force __wsum)npt->dst_pfx.in6.s6_addr16[i]);
-	}
+	src_sum = csum_partial(&npt->src_pfx.in6, sizeof(npt->src_pfx.in6), 0);
+	dst_sum = csum_partial(&npt->dst_pfx.in6, sizeof(npt->dst_pfx.in6), 0);
 
 	npt->adjustment = csum_fold(csum_sub(src_sum, dst_sum));
 	return 0;
-- 
1.7.9.5