ath: Remove extern from function prototypes
There are a mix of function prototypes with and without extern
in the kernel sources. Standardize on not using extern for
function prototypes.
Function prototypes don't need to be written with extern.
extern is assumed by the compiler. Its use is as unnecessary as
using auto to declare automatic/local variables in a block.
Signed-off-by: Joe Perches <joe@perches.com>
diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index 2ee35f6..da24ba2 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -952,7 +952,7 @@
u8 ath_txchainmask_reduction(struct ath_softc *sc, u8 chainmask, u32 rate);
void ath_start_rfkill_poll(struct ath_softc *sc);
-extern void ath9k_rfkill_poll_state(struct ieee80211_hw *hw);
+void ath9k_rfkill_poll_state(struct ieee80211_hw *hw);
void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ath9k_vif_iter_data *iter_data);