net: add fib_rules_ops to flush_cache method

This is required to pass namespace context into rt_cache_flush called from
->flush_cache.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index e3e9ab0..1c2943a 100644
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -69,7 +69,7 @@
 static void flush_route_cache(struct fib_rules_ops *ops)
 {
 	if (ops->flush_cache)
-		ops->flush_cache();
+		ops->flush_cache(ops);
 }
 
 int fib_rules_register(struct fib_rules_ops *ops)