diff --git a/drivers/cpuidle/coupled.c b/drivers/cpuidle/coupled.c
index 344058f8501a2c2ee888189950b79f615e815a02..d5657d50ac4044d5da886050e822517fe1134b6f 100644
--- a/drivers/cpuidle/coupled.c
+++ b/drivers/cpuidle/coupled.c
@@ -119,7 +119,6 @@ struct cpuidle_coupled {
 
 #define CPUIDLE_COUPLED_NOT_IDLE	(-1)
 
-static DEFINE_MUTEX(cpuidle_coupled_lock);
 static DEFINE_PER_CPU(struct call_single_data, cpuidle_coupled_poke_cb);
 
 /*