[PATCH] docs: add rtla documentation kernel docs index

[Shuah Khan <skhan@linuxfoundation.org>]

Link rtla documentation to kernel docs. This patch adds index files under
tools and rtla directories linking them to the kernel docs index.

This patch doesn't make any changes to the rtla Makefile and rtla files,
hence no changes to rtla doc build and install.

Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
---
 Documentation/index.rst            | 10 ++++++++++
 Documentation/tools/index.rst      | 17 +++++++++++++++++
 Documentation/tools/rtla/index.rst | 19 +++++++++++++++++++
 3 files changed, 46 insertions(+)
 create mode 100644 Documentation/tools/index.rst
 create mode 100644 Documentation/tools/rtla/index.rst

diff --git a/Documentation/index.rst b/Documentation/index.rst
index 2b4de3926858..3852b419fd68 100644
--- a/Documentation/index.rst
+++ b/Documentation/index.rst
@@ -155,6 +155,16 @@ Architecture-specific documentation
 
    arch
 
+Linux kernel Tools documentation
+--------------------------------
+
+This is a collection user doucmentation for kernel tools that reside under
+the *tools* directory.
+
+.. toctree::
+   :maxdepth: 2
+
+   tools/index
 
 Other documentation
 -------------------
diff --git a/Documentation/tools/index.rst b/Documentation/tools/index.rst
new file mode 100644
index 000000000000..3352ec693596
--- /dev/null
+++ b/Documentation/tools/index.rst
@@ -0,0 +1,17 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+================================
+RTLA documentation and man-pages
+================================
+
+.. toctree::
+   :maxdepth: 2
+
+   rtla/index
+
+.. only::  subproject and html
+
+   Indices
+   =======
+
+   * :ref:`genindex`
diff --git a/Documentation/tools/rtla/index.rst b/Documentation/tools/rtla/index.rst
new file mode 100644
index 000000000000..5aacc2e8113d
--- /dev/null
+++ b/Documentation/tools/rtla/index.rst
@@ -0,0 +1,19 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+.. toctree::
+   :maxdepth: 1
+
+   rtla
+   rtla-osnoise
+   rtla-osnoise-hist
+   rtla-osnoise-top
+   rtla-timerlat
+   rtla-timerlat-hist
+   rtla-timerlat-top
+
+.. only::  subproject and html
+
+   Indices
+   =======
+
+   * :ref:`genindex`
-- 
2.32.0