diff --git a/drivers/net/sfc/efx.c b/drivers/net/sfc/efx.c
index fa6e0207de17747785b5f610d627481d95469a69..05df20e47976cb3965c59c5b227e67877bd2d0c4 100644
--- a/drivers/net/sfc/efx.c
+++ b/drivers/net/sfc/efx.c
@@ -68,14 +68,6 @@ const char *efx_loopback_mode_names[] = {
 	[LOOPBACK_PHYXS_WS]  	= "PHYXS_WS",
 };
 
-/* Interrupt mode names (see INT_MODE())) */
-const unsigned int efx_interrupt_mode_max = EFX_INT_MODE_MAX;
-const char *efx_interrupt_mode_names[] = {
-	[EFX_INT_MODE_MSIX]   = "MSI-X",
-	[EFX_INT_MODE_MSI]    = "MSI",
-	[EFX_INT_MODE_LEGACY] = "legacy",
-};
-
 const unsigned int efx_reset_type_max = RESET_TYPE_MAX;
 const char *efx_reset_type_names[] = {
 	[RESET_TYPE_INVISIBLE]     = "INVISIBLE",
@@ -128,7 +120,7 @@ static int napi_weight = 64;
  * - Check the on-board hardware monitor;
  * - Poll the link state and reconfigure the hardware as necessary.
  */
-unsigned int efx_monitor_interval = 1 * HZ;
+static unsigned int efx_monitor_interval = 1 * HZ;
 
 /* This controls whether or not the driver will initialise devices
  * with invalid MAC addresses stored in the EEPROM or flash.  If true,
@@ -2180,10 +2172,8 @@ int efx_port_dummy_op_int(struct efx_nic *efx)
 	return 0;
 }
 void efx_port_dummy_op_void(struct efx_nic *efx) {}
-void efx_port_dummy_op_set_id_led(struct efx_nic *efx, enum efx_led_mode mode)
-{
-}
-bool efx_port_dummy_op_poll(struct efx_nic *efx)
+
+static bool efx_port_dummy_op_poll(struct efx_nic *efx)
 {
 	return false;
 }
diff --git a/drivers/net/sfc/efx.h b/drivers/net/sfc/efx.h
index f502b14eb22c8c98685bd25b68d08e05a16a3c65..10a1bf40da962e729c3c8e3312a24cb7af08f8b5 100644
--- a/drivers/net/sfc/efx.h
+++ b/drivers/net/sfc/efx.h
@@ -88,10 +88,6 @@ extern int efx_reconfigure_port(struct efx_nic *efx);
 extern int __efx_reconfigure_port(struct efx_nic *efx);
 
 /* Ethtool support */
-extern int efx_ethtool_get_settings(struct net_device *net_dev,
-				    struct ethtool_cmd *ecmd);
-extern int efx_ethtool_set_settings(struct net_device *net_dev,
-				    struct ethtool_cmd *ecmd);
 extern const struct ethtool_ops efx_ethtool_ops;
 
 /* Reset handling */
@@ -107,9 +103,7 @@ extern void efx_init_irq_moderation(struct efx_nic *efx, int tx_usecs,
 /* Dummy PHY ops for PHY drivers */
 extern int efx_port_dummy_op_int(struct efx_nic *efx);
 extern void efx_port_dummy_op_void(struct efx_nic *efx);
-extern void
-efx_port_dummy_op_set_id_led(struct efx_nic *efx, enum efx_led_mode mode);
-extern bool efx_port_dummy_op_poll(struct efx_nic *efx);
+
 
 /* MTD */
 #ifdef CONFIG_SFC_MTD
@@ -122,8 +116,6 @@ static inline void efx_mtd_rename(struct efx_nic *efx) {}
 static inline void efx_mtd_remove(struct efx_nic *efx) {}
 #endif
 
-extern unsigned int efx_monitor_interval;
-
 static inline void efx_schedule_channel(struct efx_channel *channel)
 {
 	netif_vdbg(channel->efx, intr, channel->efx->net_dev,
diff --git a/drivers/net/sfc/ethtool.c b/drivers/net/sfc/ethtool.c
index c95328fa3ee84ae2a0d37b9ed69e9bb48c6df1e5..edb9d16b8b47b0f81f622bfd91b6e9fbf3a70f6a 100644
--- a/drivers/net/sfc/ethtool.c
+++ b/drivers/net/sfc/ethtool.c
@@ -187,8 +187,8 @@ static int efx_ethtool_phys_id(struct net_device *net_dev, u32 count)
 }
 
 /* This must be called with rtnl_lock held. */
-int efx_ethtool_get_settings(struct net_device *net_dev,
-			     struct ethtool_cmd *ecmd)
+static int efx_ethtool_get_settings(struct net_device *net_dev,
+				    struct ethtool_cmd *ecmd)
 {
 	struct efx_nic *efx = netdev_priv(net_dev);
 	struct efx_link_state *link_state = &efx->link_state;
@@ -211,8 +211,8 @@ int efx_ethtool_get_settings(struct net_device *net_dev,
 }
 
 /* This must be called with rtnl_lock held. */
-int efx_ethtool_set_settings(struct net_device *net_dev,
-			     struct ethtool_cmd *ecmd)
+static int efx_ethtool_set_settings(struct net_device *net_dev,
+				    struct ethtool_cmd *ecmd)
 {
 	struct efx_nic *efx = netdev_priv(net_dev);
 	int rc;
@@ -891,7 +891,7 @@ static int efx_ethtool_set_wol(struct net_device *net_dev,
 	return efx->type->set_wol(efx, wol->wolopts);
 }
 
-extern int efx_ethtool_reset(struct net_device *net_dev, u32 *flags)
+static int efx_ethtool_reset(struct net_device *net_dev, u32 *flags)
 {
 	struct efx_nic *efx = netdev_priv(net_dev);
 	enum reset_type method;
diff --git a/drivers/net/sfc/falcon_xmac.c b/drivers/net/sfc/falcon_xmac.c
index bae656dd2c4ee800d161caf3d47255aca07dae40..b31f595ebb5b6c3426e968d7d790cd1409f8518d 100644
--- a/drivers/net/sfc/falcon_xmac.c
+++ b/drivers/net/sfc/falcon_xmac.c
@@ -143,7 +143,7 @@ static bool falcon_xmac_link_ok(struct efx_nic *efx)
 		 efx_mdio_phyxgxs_lane_sync(efx));
 }
 
-void falcon_reconfigure_xmac_core(struct efx_nic *efx)
+static void falcon_reconfigure_xmac_core(struct efx_nic *efx)
 {
 	unsigned int max_frame_len;
 	efx_oword_t reg;
diff --git a/drivers/net/sfc/mac.h b/drivers/net/sfc/mac.h
index 7a6e5ca0290e8a48bab35880d10a2303a3200214..6886cdf87c127c911aa63024a86826adc4da94b1 100644
--- a/drivers/net/sfc/mac.h
+++ b/drivers/net/sfc/mac.h
@@ -15,7 +15,6 @@
 
 extern struct efx_mac_operations falcon_xmac_operations;
 extern struct efx_mac_operations efx_mcdi_mac_operations;
-extern void falcon_reconfigure_xmac_core(struct efx_nic *efx);
 extern int efx_mcdi_mac_stats(struct efx_nic *efx, dma_addr_t dma_addr,
 			      u32 dma_len, int enable, int clear);
 
diff --git a/drivers/net/sfc/mcdi.c b/drivers/net/sfc/mcdi.c
index 3912b8fed912d5f2bb488acc4bdccf439b0c5fe7..12cf910c2ce712f72dc5b960695700395b516d59 100644
--- a/drivers/net/sfc/mcdi.c
+++ b/drivers/net/sfc/mcdi.c
@@ -1093,8 +1093,8 @@ int efx_mcdi_reset_mc(struct efx_nic *efx)
 	return rc;
 }
 
-int efx_mcdi_wol_filter_set(struct efx_nic *efx, u32 type,
-			    const u8 *mac, int *id_out)
+static int efx_mcdi_wol_filter_set(struct efx_nic *efx, u32 type,
+				   const u8 *mac, int *id_out)
 {
 	u8 inbuf[MC_CMD_WOL_FILTER_SET_IN_LEN];
 	u8 outbuf[MC_CMD_WOL_FILTER_SET_OUT_LEN];
diff --git a/drivers/net/sfc/mcdi.h b/drivers/net/sfc/mcdi.h
index f1f89ad4075ac2750623a840dc66812217fa0ad9..c792f1d65e4880d84e85a136289e945e1ca863f1 100644
--- a/drivers/net/sfc/mcdi.h
+++ b/drivers/net/sfc/mcdi.h
@@ -121,8 +121,6 @@ extern int efx_mcdi_handle_assertion(struct efx_nic *efx);
 extern void efx_mcdi_set_id_led(struct efx_nic *efx, enum efx_led_mode mode);
 extern int efx_mcdi_reset_port(struct efx_nic *efx);
 extern int efx_mcdi_reset_mc(struct efx_nic *efx);
-extern int efx_mcdi_wol_filter_set(struct efx_nic *efx, u32 type,
-				   const u8 *mac, int *id_out);
 extern int efx_mcdi_wol_filter_set_magic(struct efx_nic *efx,
 					 const u8 *mac, int *id_out);
 extern int efx_mcdi_wol_filter_get_magic(struct efx_nic *efx, int *id_out);
diff --git a/drivers/net/sfc/mcdi_phy.c b/drivers/net/sfc/mcdi_phy.c
index 0121e71702bf9a5183ece1870c544f409d44b05f..c992742446b167d2a660665bda43eced3445fcab 100644
--- a/drivers/net/sfc/mcdi_phy.c
+++ b/drivers/net/sfc/mcdi_phy.c
@@ -713,7 +713,8 @@ static int efx_mcdi_phy_run_tests(struct efx_nic *efx, int *results,
 	return 0;
 }
 
-const char *efx_mcdi_phy_test_name(struct efx_nic *efx, unsigned int index)
+static const char *efx_mcdi_phy_test_name(struct efx_nic *efx,
+					  unsigned int index)
 {
 	struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
 
diff --git a/drivers/net/sfc/net_driver.h b/drivers/net/sfc/net_driver.h
index 44f4d58a39a68d829795e22c389bc7dec46ff42b..0a7e26d73b525b13aba1fc9e234d38a699322f2a 100644
--- a/drivers/net/sfc/net_driver.h
+++ b/drivers/net/sfc/net_driver.h
@@ -387,11 +387,6 @@ extern const unsigned int efx_loopback_mode_max;
 #define LOOPBACK_MODE(efx) \
 	STRING_TABLE_LOOKUP((efx)->loopback_mode, efx_loopback_mode)
 
-extern const char *efx_interrupt_mode_names[];
-extern const unsigned int efx_interrupt_mode_max;
-#define INT_MODE(efx) \
-	STRING_TABLE_LOOKUP(efx->interrupt_mode, efx_interrupt_mode)
-
 extern const char *efx_reset_type_names[];
 extern const unsigned int efx_reset_type_max;
 #define RESET_TYPE(type) \
diff --git a/drivers/net/sfc/nic.c b/drivers/net/sfc/nic.c
index 394dd929fee75bd91f12d9dbdd889f4b1058f302..41c36b9a4244b907907936b0a6abeaf8f2a301d1 100644
--- a/drivers/net/sfc/nic.c
+++ b/drivers/net/sfc/nic.c
@@ -653,7 +653,7 @@ void efx_nic_eventq_read_ack(struct efx_channel *channel)
 }
 
 /* Use HW to insert a SW defined event */
-void efx_generate_event(struct efx_channel *channel, efx_qword_t *event)
+static void efx_generate_event(struct efx_channel *channel, efx_qword_t *event)
 {
 	efx_oword_t drv_ev_reg;
 
diff --git a/drivers/net/sfc/selftest.c b/drivers/net/sfc/selftest.c
index da4473b71058ee7ed217276f1ed55e1c0abf6931..0ebfb99f12991fc0e4a7bfe3b17799c736834798 100644
--- a/drivers/net/sfc/selftest.c
+++ b/drivers/net/sfc/selftest.c
@@ -48,6 +48,16 @@ static const unsigned char payload_source[ETH_ALEN] = {
 static const char payload_msg[] =
 	"Hello world! This is an Efx loopback test in progress!";
 
+/* Interrupt mode names */
+static const unsigned int efx_interrupt_mode_max = EFX_INT_MODE_MAX;
+static const char *efx_interrupt_mode_names[] = {
+	[EFX_INT_MODE_MSIX]   = "MSI-X",
+	[EFX_INT_MODE_MSI]    = "MSI",
+	[EFX_INT_MODE_LEGACY] = "legacy",
+};
+#define INT_MODE(efx) \
+	STRING_TABLE_LOOKUP(efx->interrupt_mode, efx_interrupt_mode)
+
 /**
  * efx_loopback_state - persistent state during a loopback selftest
  * @flush:		Drop all packets in efx_loopback_rx_packet
diff --git a/drivers/net/sfc/siena.c b/drivers/net/sfc/siena.c
index 2115f95ddc88b7337a892e97a4407f43d73c79f8..45236f58a25849e6bf49f63a9e1207725a245834 100644
--- a/drivers/net/sfc/siena.c
+++ b/drivers/net/sfc/siena.c
@@ -129,7 +129,7 @@ static int siena_probe_port(struct efx_nic *efx)
 	return 0;
 }
 
-void siena_remove_port(struct efx_nic *efx)
+static void siena_remove_port(struct efx_nic *efx)
 {
 	efx->phy_op->remove(efx);
 	efx_nic_free_buffer(efx, &efx->stats_buffer);