diff --git a/drivers/macintosh/windfarm_cpufreq_clamp.c b/drivers/macintosh/windfarm_cpufreq_clamp.c
index 72d1fdfe02a5..2626990331dc 100644
--- a/drivers/macintosh/windfarm_cpufreq_clamp.c
+++ b/drivers/macintosh/windfarm_cpufreq_clamp.c
@@ -63,7 +63,7 @@ static s32 clamp_max(struct wf_control *ct)
 	return 1;
 }
 
-static struct wf_control_ops clamp_ops = {
+static const struct wf_control_ops clamp_ops = {
 	.set_value	= clamp_set,
 	.get_value	= clamp_get,
 	.get_min	= clamp_min,
diff --git a/drivers/macintosh/windfarm_rm31.c b/drivers/macintosh/windfarm_rm31.c
index bdfcb8a8bfbb..a0cd9c7f9835 100644
--- a/drivers/macintosh/windfarm_rm31.c
+++ b/drivers/macintosh/windfarm_rm31.c
@@ -338,7 +338,7 @@ static int cpu_setup_pid(int cpu)
 }
 
 /* Backside/U3 fan */
-static struct wf_pid_param backside_param = {
+static const struct wf_pid_param backside_param = {
 	.interval	= 1,
 	.history_len	= 2,
 	.gd		= 0x00500000,
@@ -351,7 +351,7 @@ static struct wf_pid_param backside_param = {
 };
 
 /* DIMMs temperature (clamp the backside fan) */
-static struct wf_pid_param dimms_param = {
+static const struct wf_pid_param dimms_param = {
 	.interval	= 1,
 	.history_len	= 20,
 	.gd		= 0,
diff --git a/drivers/macintosh/windfarm_smu_controls.c b/drivers/macintosh/windfarm_smu_controls.c
index c155a54e8638..d174c7437337 100644
--- a/drivers/macintosh/windfarm_smu_controls.c
+++ b/drivers/macintosh/windfarm_smu_controls.c
@@ -145,7 +145,7 @@ static s32 smu_fan_max(struct wf_control *ct)
 	return fct->max;
 }
 
-static struct wf_control_ops smu_fan_ops = {
+static const struct wf_control_ops smu_fan_ops = {
 	.set_value	= smu_fan_set,
 	.get_value	= smu_fan_get,
 	.get_min	= smu_fan_min,