We get 1 warning when building kernel with W=1:
drivers/net/ethernet/intel/igb/igb_ethtool.c:2707:5: warning: no previous 
prototype for 'igb_rxnfc_write_vlan_prio_filter' [-Wmissing-prototypes]

In fact, this function is only used in the file in which it is
declared and don't need a declaration, but can be made static.
so this patch marks this function with 'static'.

Signed-off-by: Baoyou Xie <baoyou....@linaro.org>
---
 drivers/net/ethernet/intel/igb/igb_ethtool.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c 
b/drivers/net/ethernet/intel/igb/igb_ethtool.c
index 0c33eca..737b664 100644
--- a/drivers/net/ethernet/intel/igb/igb_ethtool.c
+++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c
@@ -2704,8 +2704,8 @@ static int igb_rxnfc_write_etype_filter(struct 
igb_adapter *adapter,
        return 0;
 }
 
-int igb_rxnfc_write_vlan_prio_filter(struct igb_adapter *adapter,
-                                    struct igb_nfc_filter *input)
+static int igb_rxnfc_write_vlan_prio_filter(struct igb_adapter *adapter,
+                                           struct igb_nfc_filter *input)
 {
        struct e1000_hw *hw = &adapter->hw;
        u8 vlan_priority;
-- 
2.7.4

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