diff --git a/arch/arm/mach-rockchip/rk_pm_tests/cpu_usage.c b/arch/arm/mach-rockchip/rk_pm_tests/cpu_usage.c
index 91e445ab3d2a..78a643d5e036 100644
--- a/arch/arm/mach-rockchip/rk_pm_tests/cpu_usage.c
+++ b/arch/arm/mach-rockchip/rk_pm_tests/cpu_usage.c
@@ -129,7 +129,7 @@ static int __init cpu_usage_init(void)
 		INIT_WORK(work, handler_cpu_usage);
 	}
 
-	setup_timer(&arm_mode_timer, arm_mode_timer_handler, (unsigned int)NULL);
+	setup_timer(&arm_mode_timer, arm_mode_timer_handler, 0);
 	return 0;
 }
 late_initcall(cpu_usage_init);