v4.19.13 snapshot.
diff --git a/Documentation/ioctl/00-INDEX b/Documentation/ioctl/00-INDEX
new file mode 100644
index 0000000..c1a9257
--- /dev/null
+++ b/Documentation/ioctl/00-INDEX
@@ -0,0 +1,12 @@
+00-INDEX
+ - this file
+botching-up-ioctls.txt
+ - how to avoid botching up ioctls
+cdrom.txt
+ - summary of CDROM ioctl calls
+hdio.txt
+ - summary of HDIO_ ioctl calls
+ioctl-decoding.txt
+ - how to decode the bits of an IOCTL code
+ioctl-number.txt
+ - how to implement and register device/driver ioctl calls