Merge branch 'broonie/spi-next' of git://git.kernel.org/pub/scm/linux/kernel/git...

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / ipv6 / netfilter / ip6t_NPT.c

diff --git a/net/ipv6/netfilter/ip6t_NPT.c b/net/ipv6/netfilter/ip6t_NPT.c
index e9486915eff6e9b8e71038e48e3bc85c483dee02..7302b0b7b642e91257b119c5b89938f4ac2846e6 100644 (file)
--- a/net/ipv6/netfilter/ip6t_NPT.c
+++ b/net/ipv6/netfilter/ip6t_NPT.c
@@ -14,42 +14,23 @@
 #include <linux/netfilter_ipv6/ip6t_NPT.h>
 #include <linux/netfilter/x_tables.h>
 
-static __sum16 csum16_complement(__sum16 a)
-{
-       return (__force __sum16)(0xffff - (__force u16)a);
-}
-
-static __sum16 csum16_add(__sum16 a, __sum16 b)
-{
-       u16 sum;
-
-       sum = (__force u16)a + (__force u16)b;
-       sum += (__force u16)a < (__force u16)b;
-       return (__force __sum16)sum;
-}
-
-static __sum16 csum16_sub(__sum16 a, __sum16 b)
-{
-       return csum16_add(a, csum16_complement(b));
-}
-
 static int ip6t_npt_checkentry(const struct xt_tgchk_param *par)
 {
        struct ip6t_npt_tginfo *npt = par->targinfo;
-       __sum16 src_sum = 0, dst_sum = 0;
+       __wsum src_sum = 0, dst_sum = 0;
        unsigned int i;
 
        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 = csum16_add(src_sum,
-                               (__force __sum16)npt->src_pfx.in6.s6_addr16[i]);
-               dst_sum = csum16_add(dst_sum,
-                               (__force __sum16)npt->dst_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]);
        }
 
-       npt->adjustment = csum16_sub(src_sum, dst_sum);
+       npt->adjustment = (__force __sum16) csum_sub(src_sum, dst_sum);
        return 0;
 }
 
@@ -85,7 +66,7 @@ static bool ip6t_npt_map_pfx(const struct ip6t_npt_tginfo *npt,
                        return false;
        }
 
-       sum = csum16_add((__force __sum16)addr->s6_addr16[idx],
+       sum = (__force __sum16) csum_add((__force __wsum)addr->s6_addr16[idx],
                         npt->adjustment);
        if (sum == CSUM_MANGLED_0)
                sum = 0;