From fe19a8fea7cb59f202ddd30ec2fa9f5bd907b3d2 Mon Sep 17 00:00:00 2001
From: Matteo Croce <mcroce@redhat.com>
Date: Sat, 19 Jan 2019 15:22:38 +0100
Subject: ipvs: avoid indirect calls when calculating checksums

The function pointer ip_vs_protocol->csum_check is only used in protocol
specific code, and never in the generic one.
Remove the function pointer from struct ip_vs_protocol and call the
checksum functions directly.
This reduces the performance impact of the Spectre mitigation, and
should give a small improvement even with RETPOLINES disabled.

Signed-off-by: Matteo Croce <mcroce@redhat.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Acked-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 include/net/ip_vs.h | 3 ---
 1 file changed, 3 deletions(-)

(limited to 'include/net/ip_vs.h')

diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index a0d2e0bb9a94..047f9a5ccaad 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -453,9 +453,6 @@ struct ip_vs_protocol {
 	int (*dnat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp,
 			    struct ip_vs_conn *cp, struct ip_vs_iphdr *iph);
 
-	int (*csum_check)(int af, struct sk_buff *skb,
-			  struct ip_vs_protocol *pp);
-
 	const char *(*state_name)(int state);
 
 	void (*state_transition)(struct ip_vs_conn *cp, int direction,
-- 
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