Commit eb386617be4bdf ("bcachefs: Errcode tracepoint, documentation")
adds initial bcachefs documentation (private error codes) but without
any table of contents tree for the filesystem docs, hence Sphinx warns:

Documentation/filesystems/bcachefs/errorcodes.rst: WARNING: document isn't included in any toctree

Add bcachefs toctree to fix above warning.

Fixes: eb386617be4b ("bcachefs: Errcode tracepoint, documentation")
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
---
 Documentation/filesystems/bcachefs/index.rst | 11 +++++++++++
 Documentation/filesystems/index.rst          |  1 +
 2 files changed, 12 insertions(+)
 create mode 100644 Documentation/filesystems/bcachefs/index.rst

diff --git a/Documentation/filesystems/bcachefs/index.rst b/Documentation/filesystems/bcachefs/index.rst
new file mode 100644
index 00000000000000..e2bd61ccd96fff
--- /dev/null
+++ b/Documentation/filesystems/bcachefs/index.rst
@@ -0,0 +1,11 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+======================
+bcachefs Documentation
+======================
+
+.. toctree::
+   :maxdepth: 2
+   :numbered:
+
+   errorcodes
diff --git a/Documentation/filesystems/index.rst b/Documentation/filesystems/index.rst
index 0ea1e44fa02823..1f9b4c905a6a7c 100644
--- a/Documentation/filesystems/index.rst
+++ b/Documentation/filesystems/index.rst
@@ -69,6 +69,7 @@ Documentation for filesystem implementations.
    afs
    autofs
    autofs-mount-control
+   bcachefs/index
    befs
    bfs
    btrfs
-- 
An old man doll... just what I always wanted! - Clara