diff --git a/drivers/base/core.c b/drivers/base/core.c
index 9649d1c..8c2cc26 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -1327,6 +1327,11 @@
  * device_rename - renames a device
  * @dev: the pointer to the struct device to be renamed
  * @new_name: the new name of the device
+ *
+ * It is the responsibility of the caller to provide mutual
+ * exclusion between two different calls of device_rename
+ * on the same device to ensure that new_name is valid and
+ * won't conflict with other devices.
  */
 int device_rename(struct device *dev, char *new_name)
 {