DB64460: Fix GCC 4.6 build warnings

Fix:
db64460.c: In function 'debug_led':
db64460.c:413:6: warning: variable 'dummy' set but not used [-Wunused-but-set-variable]
mv_eth.c: In function 'mv64460_eth_real_open':
mv_eth.c:423:6: warning: variable 'port_status' set but not used [-Wunused-but-set-variable]
mv_eth.c: In function 'mv64460_eth_stop':
mv_eth.c:641:15: warning: variable 'port_num' set but not used [-Wunused-but-set-variable]
mv_eth.c: In function 'mv64460_eth_xmit':
mv_eth.c:717:15: warning: variable 'port_num' set but not used [-Wunused-but-set-variable]
mv_eth.c: In function 'mv64460_eth_receive':
mv_eth.c:802:15: warning: variable 'port_num' set but not used [-Wunused-but-set-variable]
mv_eth.c: In function 'mv64460_eth_get_stats':
mv_eth.c:901:15: warning: variable 'port_num' set but not used [-Wunused-but-set-variable]
mv_eth.c: In function 'mv64460_eth_update_stat':
mv_eth.c:929:24: warning: variable 'dummy' set but not used [-Wunused-but-set-variable]
mv_eth.c:928:15: warning: variable 'port_num' set but not used [-Wunused-but-set-variable]
mv_eth.c: In function 'mv64460_eth_print_stat':
mv_eth.c:1010:15: warning: variable 'port_num' set but not used [-Wunused-but-set-variable]
mv_eth.c: In function 'eth_clear_mib_counters':
mv_eth.c:2067:15: warning: variable 'dummy' set but not used [-Wunused-but-set-variable]
sdram_init.c: In function 'check_dimm':
sdram_init.c:289:50: warning: variable 'trrd_clocks' set but not used [-Wunused-but-set-variable]
sdram_init.c:289:37: warning: variable 'tras_clocks' set but not used [-Wunused-but-set-variable]
sdram_init.c:289:24: warning: variable 'trcd_clocks' set but not used [-Wunused-but-set-variable]
sdram_init.c:289:8: warning: variable 'trp_clocks' set but not used [-Wunused-but-set-variable]
sdram_init.c:279:34: warning: variable 'devicesForErrCheck' set but not used [-Wunused-but-set-variable]
sdram_init.c: In function 'setup_sdram':
sdram_init.c:1255:13: warning: variable 'check' set but not used [-Wunused-but-set-variable]
sdram_init.c: In function 'initdram':
sdram_init.c:1744:25: warning: variable 'check' set but not used [-Wunused-but-set-variable]
sdram_init.c:1742:14: warning: variable 's1' set but not used [-Wunused-but-set-variable]
sdram_init.c:1742:6: warning: variable 's0' set but not used [-Wunused-but-set-variable]

Note: no attempt was make to clean up the mess coding style and
other issues in sdram_init.c

Signed-off-by: Wolfgang Denk <wd@denx.de>

board/Marvell/db64460/db64460.c

@@ -34,6 +34,7 @@
 #include "../include/mv_gen_reg.h"
 #include <net.h>
 #include <netdev.h>
+#include <linux/compiler.h>
 
 #include "eth.h"
 #include "mpsc.h"
@@ -410,7 +411,7 @@ int checkboard (void)
 void debug_led (int led, int mode)
 {
 	volatile int *addr = 0;
-	int dummy;
+	__maybe_unused int dummy;
 
 	if (mode == 1) {
 		switch (led) {

board/Marvell/db64460/mv_eth.c

@@ -420,7 +420,7 @@ static int mv64460_eth_real_open (struct eth_device *dev)
 	ETH_PORT_INFO *ethernet_private;
 	struct mv64460_eth_priv *port_private;
 	unsigned int port_num;
-	u32 port_status, phy_reg_data;
+	u32 phy_reg_data;
 
 	ethernet_private = (ETH_PORT_INFO *) dev->priv;
 	/* ronen - when we update the MAC env params we only update dev->enetaddr
@@ -518,7 +518,7 @@ static int mv64460_eth_real_open (struct eth_device *dev)
 	 */
 
 	MV_REG_WRITE (MV64460_ETH_MAXIMUM_TRANSMIT_UNIT (port_num), 0);
-	port_status = MV_REG_READ (MV64460_ETH_PORT_STATUS_REG (port_num));
+	MV_REG_READ (MV64460_ETH_PORT_STATUS_REG (port_num));
 
 	/* Check Link status on phy */
 	eth_port_read_smi_reg (port_num, 1, &phy_reg_data);
@@ -636,15 +636,6 @@ static int mv64460_eth_free_rx_rings (struct eth_device *dev)
 
 int mv64460_eth_stop (struct eth_device *dev)
 {
-	ETH_PORT_INFO *ethernet_private;
-	struct mv64460_eth_priv *port_private;
-	unsigned int port_num;
-
-	ethernet_private = (ETH_PORT_INFO *) dev->priv;
-	port_private =
-		(struct mv64460_eth_priv *) ethernet_private->port_private;
-	port_num = port_private->port_num;
-
 	/* Disable all gigE address decoder */
 	MV_REG_WRITE (MV64460_ETH_BASE_ADDR_ENABLE_REG, 0x3f);
 	DP (printf ("%s Ethernet stop called ... \n", __FUNCTION__));
@@ -714,7 +705,6 @@ int mv64460_eth_xmit (struct eth_device *dev, volatile void *dataPtr,
 {
 	ETH_PORT_INFO *ethernet_private;
 	struct mv64460_eth_priv *port_private;
-	unsigned int port_num;
 	PKT_INFO pkt_info;
 	ETH_FUNC_RET_STATUS status;
 	struct net_device_stats *stats;
@@ -723,7 +713,6 @@ int mv64460_eth_xmit (struct eth_device *dev, volatile void *dataPtr,
 	ethernet_private = (ETH_PORT_INFO *) dev->priv;
 	port_private =
 		(struct mv64460_eth_priv *) ethernet_private->port_private;
-	port_num = port_private->port_num;
 
 	stats = port_private->stats;
 
@@ -799,15 +788,12 @@ int mv64460_eth_receive (struct eth_device *dev)
 {
 	ETH_PORT_INFO *ethernet_private;
 	struct mv64460_eth_priv *port_private;
-	unsigned int port_num;
 	PKT_INFO pkt_info;
 	struct net_device_stats *stats;
 
-
 	ethernet_private = (ETH_PORT_INFO *) dev->priv;
 	port_private =
 		(struct mv64460_eth_priv *) ethernet_private->port_private;
-	port_num = port_private->port_num;
 	stats = port_private->stats;
 
 	while ((eth_port_receive (ethernet_private, ETH_Q0, &pkt_info) ==
@@ -898,12 +884,10 @@ static struct net_device_stats *mv64460_eth_get_stats (struct eth_device *dev)
 {
 	ETH_PORT_INFO *ethernet_private;
 	struct mv64460_eth_priv *port_private;
-	unsigned int port_num;
 
 	ethernet_private = (ETH_PORT_INFO *) dev->priv;
 	port_private =
 		(struct mv64460_eth_priv *) ethernet_private->port_private;
-	port_num = port_private->port_num;
 
 	mv64460_eth_update_stat (dev);
 
@@ -925,13 +909,10 @@ static void mv64460_eth_update_stat (struct eth_device *dev)
 	ETH_PORT_INFO *ethernet_private;
 	struct mv64460_eth_priv *port_private;
 	struct net_device_stats *stats;
-	unsigned int port_num;
-	volatile unsigned int dummy;
 
 	ethernet_private = (ETH_PORT_INFO *) dev->priv;
 	port_private =
 		(struct mv64460_eth_priv *) ethernet_private->port_private;
-	port_num = port_private->port_num;
 	stats = port_private->stats;
 
 	/* These are false updates */
@@ -954,12 +935,12 @@ static void mv64460_eth_update_stat (struct eth_device *dev)
 	 * But the unsigned long in PowerPC and MIPS are 32bit. So the next read
 	 * is just a dummy read for proper work of the GigE port
 	 */
-	dummy = eth_read_mib_counter (ethernet_private->port_num,
+	eth_read_mib_counter (ethernet_private->port_num,
 				      ETH_MIB_GOOD_OCTETS_RECEIVED_HIGH);
 	stats->tx_bytes += (unsigned long)
 		eth_read_mib_counter (ethernet_private->port_num,
 				      ETH_MIB_GOOD_OCTETS_SENT_LOW);
-	dummy = eth_read_mib_counter (ethernet_private->port_num,
+	eth_read_mib_counter (ethernet_private->port_num,
 				      ETH_MIB_GOOD_OCTETS_SENT_HIGH);
 	stats->rx_errors += (unsigned long)
 		eth_read_mib_counter (ethernet_private->port_num,
@@ -1007,12 +988,10 @@ static void mv64460_eth_print_stat (struct eth_device *dev)
 	ETH_PORT_INFO *ethernet_private;
 	struct mv64460_eth_priv *port_private;
 	struct net_device_stats *stats;
-	unsigned int port_num;
 
 	ethernet_private = (ETH_PORT_INFO *) dev->priv;
 	port_private =
 		(struct mv64460_eth_priv *) ethernet_private->port_private;
-	port_num = port_private->port_num;
 	stats = port_private->stats;
 
 	/* These are false updates */
@@ -2064,13 +2043,11 @@ static void eth_port_init_mac_tables (ETH_PORT eth_port_num)
 static void eth_clear_mib_counters (ETH_PORT eth_port_num)
 {
 	int i;
-	unsigned int dummy;
 
 	/* Perform dummy reads from MIB counters */
 	for (i = ETH_MIB_GOOD_OCTETS_RECEIVED_LOW; i < ETH_MIB_LATE_COLLISION;
 	     i += 4)
-		dummy = MV_REG_READ ((MV64460_ETH_MIB_COUNTERS_BASE
-				      (eth_port_num) + i));
+		MV_REG_READ((MV64460_ETH_MIB_COUNTERS_BASE(eth_port_num) + i));
 
 	return;
 }