netfilter: xtables: move extension arguments into compound structure (2/6)

This patch does this for match extensions' checkentry functions.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/net/ipv6/netfilter/ip6t_rt.c b/net/ipv6/netfilter/ip6t_rt.c
index 9cf4b8a..356b8d6 100644
--- a/net/ipv6/netfilter/ip6t_rt.c
+++ b/net/ipv6/netfilter/ip6t_rt.c
@@ -186,13 +186,9 @@
 	return false;
 }
 
-/* Called when user tries to insert an entry of this type. */
-static bool
-rt_mt6_check(const char *tablename, const void *entry,
-             const struct xt_match *match, void *matchinfo,
-             unsigned int hook_mask)
+static bool rt_mt6_check(const struct xt_mtchk_param *par)
 {
-	const struct ip6t_rt *rtinfo = matchinfo;
+	const struct ip6t_rt *rtinfo = par->matchinfo;
 
 	if (rtinfo->invflags & ~IP6T_RT_INV_MASK) {
 		pr_debug("ip6t_rt: unknown flags %X\n", rtinfo->invflags);