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Commit 35353c2b authored by Li RongQing's avatar Li RongQing Committed by David S. Miller
Browse files

ipv4: replace ip_fast_csum with csum_replace2 



replace ip_fast_csum with csum_replace2 to save cpu cycles

Signed-off-by: default avatarLi RongQing <roy.qing.li@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1bcac3b0

net/ipv4/inet_lro.c

+2 −3
Original line number Diff line number Diff line
@@ -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);