netdev - [PATCH net-next] net: neterion: replace ip_fast_csum with csum

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 18 Mar 2013 16:34:48 +0800
From:	roy.qing.li@...il.com
To:	netdev@...r.kernel.org
Subject: [PATCH net-next] net: neterion: replace ip_fast_csum with csum_replace2

From: Li RongQing <roy.qing.li@...il.com>

replace ip_fast_csum with csum_replace2 to save cpu cycles

Signed-off-by: Li RongQing <roy.qing.li@...il.com>
---
 drivers/net/ethernet/neterion/s2io.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/neterion/s2io.c b/drivers/net/ethernet/neterion/s2io.c
index bfd8873..3371ff4 100644
--- a/drivers/net/ethernet/neterion/s2io.c
+++ b/drivers/net/ethernet/neterion/s2io.c
@@ -80,6 +80,7 @@
 #include <linux/slab.h>
 #include <linux/prefetch.h>
 #include <net/tcp.h>
+#include <net/checksum.h>
 
 #include <asm/div64.h>
 #include <asm/irq.h>
@@ -8337,16 +8338,13 @@ static void update_L3L4_header(struct s2io_nic *sp, struct lro *lro)
 {
 	struct iphdr *ip = lro->iph;
 	struct tcphdr *tcp = lro->tcph;
-	__sum16 nchk;
 	struct swStat *swstats = &sp->mac_control.stats_info->sw_stat;
 
 	DBG_PRINT(INFO_DBG, "%s: Been here...\n", __func__);
 
 	/* Update L3 header */
+	csum_replace2(&ip->check, ip->tot_len, htons(lro->total_len));
 	ip->tot_len = htons(lro->total_len);
-	ip->check = 0;
-	nchk = ip_fast_csum((u8 *)lro->iph, ip->ihl);
-	ip->check = nchk;
 
 	/* Update L4 header */
 	tcp->ack_seq = lro->tcp_ack;
-- 
1.7.10.4

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html