stmicro: make local variables static

Make variables only used in one file static. Also avoids possible
namespace collisions.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/stmicro/stmmac/stmmac.h

@@ -108,8 +108,6 @@ struct stmmac_priv {
 	spinlock_t ptp_lock;
 };
 
-extern int phyaddr;
-
 int stmmac_mdio_unregister(struct net_device *ndev);
 int stmmac_mdio_register(struct net_device *ndev);
 void stmmac_set_ethtool_ops(struct net_device *netdev);

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

@@ -64,7 +64,7 @@ static int debug = -1;
 module_param(debug, int, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(debug, "Message Level (-1: default, 0: no output, 16: all)");
 
-int phyaddr = -1;
+static int phyaddr = -1;
 module_param(phyaddr, int, S_IRUGO);
 MODULE_PARM_DESC(phyaddr, "Physical device address");
 

drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c

@@ -26,9 +26,9 @@
 #include <linux/pci.h>
 #include "stmmac.h"
 
-struct plat_stmmacenet_data plat_dat;
-struct stmmac_mdio_bus_data mdio_data;
-struct stmmac_dma_cfg dma_cfg;
+static struct plat_stmmacenet_data plat_dat;
+static struct stmmac_mdio_bus_data mdio_data;
+static struct stmmac_dma_cfg dma_cfg;
 
 static void stmmac_default_data(void)
 {