diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index 737e56d46f61950826419bbef2d9fb66d69abcc1..26a0bd893b86826663b22835c940b17dc1a7e80d 100644
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -45,7 +45,6 @@ MODULE_LICENSE("GPL");
 
 #define ACPI_WMI_CLASS "wmi"
 
-static DEFINE_MUTEX(wmi_data_lock);
 static LIST_HEAD(wmi_block_list);
 
 struct guid_block {