Files
linux/Documentation/userspace-api/index.rst
Jani Nikula a592a36e49 Documentation: use a source-read extension for the index link boilerplate
The root document usually has a special :ref:`genindex` link to the
generated index. This is also the case for Documentation/index.rst. The
other index.rst files deeper in the directory hierarchy usually don't.

For SPHINXDIRS builds, the root document isn't Documentation/index.rst,
but some other index.rst in the hierarchy. Currently they have a
".. only::" block to add the index link when doing SPHINXDIRS html
builds.

This is obviously very tedious and repetitive. The link is also added to
all index.rst files in the hierarchy for SPHINXDIRS builds, not just the
root document.

Put the boilerplate in a sphinx-includes/subproject-index.rst file, and
include it at the end of the root document for subproject builds in an
ad-hoc source-read extension defined in conf.py.

For now, keep having the boilerplate in translations, because this
approach currently doesn't cover translated index link headers.

Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Tested-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
[jc: did s/doctree/kern_doc_dir/ ]
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260123143149.2024303-1-jani.nikula@intel.com>
2026-01-23 11:59:34 -07:00

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=====================================
The Linux kernel user-space API guide
=====================================
.. _man-pages: https://www.kernel.org/doc/man-pages/
While much of the kernel's user-space API is documented elsewhere
(particularly in the man-pages_ project), some user-space information can
also be found in the kernel tree itself. This manual is intended to be the
place where this information is gathered.
System calls
============
.. toctree::
:maxdepth: 1
unshare
futex2
ebpf/index
ioctl/index
mseal
Security-related interfaces
===========================
.. toctree::
:maxdepth: 1
no_new_privs
seccomp_filter
landlock
lsm
mfd_noexec
spec_ctrl
tee
check_exec
Devices and I/O
===============
.. toctree::
:maxdepth: 1
accelerators/ocxl
dma-buf-heaps
dma-buf-alloc-exchange
fwctl/index
gpio/index
iommufd
media/index
dcdbas
vduse
isapnp
Everything else
===============
.. toctree::
:maxdepth: 1
ELF
liveupdate
netlink/index
sysfs-platform_profile
vduse
futex2
perf_ring_buffer
ntsync