diff --git a/drivers/devfreq/event/exynos-ppmu.c b/drivers/devfreq/event/exynos-ppmu.c
index 958285d5d64b..107eb91a9415 100644
--- a/drivers/devfreq/event/exynos-ppmu.c
+++ b/drivers/devfreq/event/exynos-ppmu.c
@@ -15,7 +15,6 @@
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/mutex.h>
 #include <linux/of_address.h>
 #include <linux/platform_device.h>
 #include <linux/suspend.h>
@@ -34,7 +33,6 @@ struct exynos_ppmu {
 	unsigned int num_events;
 
 	struct device *dev;
-	struct mutex lock;
 
 	struct exynos_ppmu_data ppmu;
 };
@@ -462,7 +460,6 @@ static int exynos_ppmu_probe(struct platform_device *pdev)
 	if (!info)
 		return -ENOMEM;
 
-	mutex_init(&info->lock);
 	info->dev = &pdev->dev;
 
 	/* Parse dt data to get resource */