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--- a/ath/if_athvar.h
+++ b/ath/if_athvar.h
@@ -974,7 +974,7 @@ typedef void (*ath_callback) (struct ath
#endif
/* Protects the device from concurrent accesses */
-#define ATH_LOCK_INIT(_sc) init_MUTEX(&(_sc)->sc_lock)
+#define ATH_LOCK_INIT(_sc) sema_init(&(_sc)->sc_lock, 1)
#define ATH_LOCK_DESTROY(_sc)
#define ATH_LOCK(_sc) down(&(_sc)->sc_lock)
#define ATH_UNLOCK(_sc) up(&(_sc)->sc_lock)
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