diff --git a/[refs] b/[refs]
index efc0797ef86e..d8270800e23b 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: be871b7e54711479d3b9d3617d49898770830db2
+refs/heads/master: 8f46baaa7ec6cd0851794020b31958e64679dd26
diff --git a/trunk/drivers/base/core.c b/trunk/drivers/base/core.c
index 56536f4b0f6b..a7391a30cb29 100644
--- a/trunk/drivers/base/core.c
+++ b/trunk/drivers/base/core.c
@@ -563,8 +563,15 @@ int device_create_file(struct device *dev,
 		       const struct device_attribute *attr)
 {
 	int error = 0;
-	if (dev)
+
+	if (dev) {
+		WARN(((attr->attr.mode & S_IWUGO) && !attr->store),
+				"Write permission without 'store'\n");
+		WARN(((attr->attr.mode & S_IRUGO) && !attr->show),
+				"Read permission without 'show'\n");
 		error = sysfs_create_file(&dev->kobj, &attr->attr);
+	}
+
 	return error;
 }