[LTP] doc: Add missing API references to api_c_tests.rst

[linuxtestproject.agent@gmail.com]

Hi Andrea,

On Thu, 04 Jun 2026 10:45:08 +0200, Andrea Cervesato wrote:
> doc: Add missing API references to api_c_tests.rst

--- [PATCH 1/3] ---

> +/**
> + * struct tst_device - Block device used by a test.
>   ...
>  */
>  struct tst_device {
>  ...
>  /*
> - * Automatically initialized if test.needs_device is set.
> + * tst_device - Pointer to the test block device.
> + *
> + * Automatically initialized if tst_test.needs_device is set.
>   */
>  extern struct tst_device *tst_device;

The tst_device variable comment body was updated to kernel-doc format
(starting with "tst_device - ..."), but the opening delimiter was left
as "/*" instead of "/**". kernel-doc ignores "/*" blocks, so this
variable will not appear in the generated documentation. Every other
function in this file was converted with "/**" in the same commit.

> +Filesystems
> +-----------
> +.. kernel-doc:: ../../include/tst_fs.h
>
> ...
>
> +Memory
> +------
> +.. kernel-doc:: ../../include/tst_memutils.h

tst_fs.h and tst_memutils.h were not converted to kernel-doc format in
this commit. tst_fs.h has a single "/**" comment for tst_path_exists(),
and tst_memutils.h has one for tst_mapping_in_range(). The primary APIs
in each header -- tst_fs_type(), tst_fs_has_free(), tst_pollute_memory(),
tst_available_mem(), tst_available_swap() -- all use plain "/*" comments
and will not be extracted.

The resulting "Filesystems" and "Memory" sections under LTP C API will
each document only one function, neither of which is the main API the
section title implies.

Was the intent to convert these headers in a follow-up, or should they
be converted here to avoid publishing sparse documentation sections?

Verdict: Needs revision

---
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