bonding: simplify the slave_do_arp_validate_only()

The argument slave is not used for slave_do_arp_validate_only(), so no need
to keep it, make the function more simple.

Cc: Jay Vosburgh <j.vosburgh@gmail.com>
Cc: Veaceslav Falico <vfalico@gmail.com>
Cc: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bonding/bond_main.c

@@ -2291,8 +2291,8 @@ int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond,
 	int alen, is_arp = skb->protocol == __cpu_to_be16(ETH_P_ARP);
 
 	if (!slave_do_arp_validate(bond, slave)) {
-		if ((slave_do_arp_validate_only(bond, slave) && is_arp) ||
-		    !slave_do_arp_validate_only(bond, slave))
+		if ((slave_do_arp_validate_only(bond) && is_arp) ||
+		    !slave_do_arp_validate_only(bond))
 			slave->last_rx = jiffies;
 		return RX_HANDLER_ANOTHER;
 	} else if (!is_arp) {

drivers/net/bonding/bonding.h

@@ -396,8 +396,7 @@ static inline int slave_do_arp_validate(struct bonding *bond,
 	return bond->params.arp_validate & (1 << bond_slave_state(slave));
 }
 
-static inline int slave_do_arp_validate_only(struct bonding *bond,
-					     struct slave *slave)
+static inline int slave_do_arp_validate_only(struct bonding *bond)
 {
 	return bond->params.arp_validate & BOND_ARP_FILTER;
 }