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ipv4: replace ip_fast_csum with csum_replace2 

replace ip_fast_csum with csum_replace2 to save cpu cycles

Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Li RongQing 2013-03-14 22:50:18 +00:00 committed by David S. Miller
parent 1bcac3b08e
commit 35353c2b42
1 changed files with 2 additions and 3 deletions
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5
net/ipv4/inet_lro.c
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@ -29,6 +29,7 @@
#include <linux/module.h>
#include <linux/if_vlan.h>
#include <linux/inet_lro.h>
#include <net/checksum.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jan-Bernd Themann <themann@de.ibm.com>");
@ -114,11 +115,9 @@ static void lro_update_tcp_ip_header(struct net_lro_desc *lro_desc)
*(p+2) = lro_desc->tcp_rcv_tsecr;
}
csum_replace2(&iph->check, iph->tot_len, htons(lro_desc->ip_tot_len));
iph->tot_len = htons(lro_desc->ip_tot_len);
iph->check = 0;
iph->check = ip_fast_csum((u8 *)lro_desc->iph, iph->ihl);
tcph->check = 0;
tcp_hdr_csum = csum_partial(tcph, TCP_HDR_LEN(tcph), 0);
lro_desc->data_csum = csum_add(lro_desc->data_csum, tcp_hdr_csum);