diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 35bd284f7763..aa2d19db2b1d 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -66,8 +66,8 @@ static struct cpuidle_driver intel_idle_driver = {
 };
 /* intel_idle.max_cstate=0 disables driver */
 static int max_cstate = CPUIDLE_STATE_MAX - 1;
-static unsigned int disabled_states_mask;
-static unsigned int preferred_states_mask;
+static unsigned int disabled_states_mask __read_mostly;
+static unsigned int preferred_states_mask __read_mostly;
 static bool force_irq_on __read_mostly;
 
 static struct cpuidle_device __percpu *intel_idle_cpuidle_devices;