From: Vishwanath Pai <vpai@akamai.com>
Date: Thu, 29 Sep 2016 17:39:50 +0000 (-0400)
Subject: netfilter: xt_hashlimit: Fix link error in 32bit arch because of 64bit division
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=1f827f5138292a6124430cdd37bcb68f30c05467;p=openwrt%2Fstaging%2Fblogic.git

netfilter: xt_hashlimit: Fix link error in 32bit arch because of 64bit division

Division of 64bit integers will cause linker error undefined reference
to `__udivdi3'. Fix this by replacing divisions with div64_64

Fixes: 11d5f15723c9 ("netfilter: xt_hashlimit: Create revision 2 to ...")
Signed-off-by: Vishwanath Pai <vpai@akamai.com>
Acked-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---

diff --git a/net/netfilter/xt_hashlimit.c b/net/netfilter/xt_hashlimit.c
index 44a095ecc7b7..2fab0c65aa94 100644
--- a/net/netfilter/xt_hashlimit.c
+++ b/net/netfilter/xt_hashlimit.c
@@ -467,17 +467,18 @@ static u64 user2credits(u64 user, int revision)
 		/* If multiplying would overflow... */
 		if (user > 0xFFFFFFFF / (HZ*CREDITS_PER_JIFFY_v1))
 			/* Divide first. */
-			return (user / XT_HASHLIMIT_SCALE) *\
-						HZ * CREDITS_PER_JIFFY_v1;
+			return div64_u64(user, XT_HASHLIMIT_SCALE)
+				* HZ * CREDITS_PER_JIFFY_v1;
 
-		return (user * HZ * CREDITS_PER_JIFFY_v1) \
-						/ XT_HASHLIMIT_SCALE;
+		return div64_u64(user * HZ * CREDITS_PER_JIFFY_v1,
+				 XT_HASHLIMIT_SCALE);
 	} else {
 		if (user > 0xFFFFFFFFFFFFFFFF / (HZ*CREDITS_PER_JIFFY))
-			return (user / XT_HASHLIMIT_SCALE_v2) *\
-						HZ * CREDITS_PER_JIFFY;
+			return div64_u64(user, XT_HASHLIMIT_SCALE_v2)
+				* HZ * CREDITS_PER_JIFFY;
 
-		return (user * HZ * CREDITS_PER_JIFFY) / XT_HASHLIMIT_SCALE_v2;
+		return div64_u64(user * HZ * CREDITS_PER_JIFFY,
+				 XT_HASHLIMIT_SCALE_v2);
 	}
 }