[PATCH v3 0/3] selftests/hid: assorted fixes

[Benjamin Tissoires <bentiss@kernel.org>]

And this is the last(?) revision of this series which should now compile
with or without CONFIG_HID_BPF set.

I had to do changes because [1] was failing

Nick, I kept your Tested-by, even if I made small changes in 1/3. Feel
free to shout if you don't want me to keep it.

Eduard, You helped us a lot in the review of v1 but never sent your
Reviewed-by or Acked-by. Do you want me to add one?

Cheers,
Benjamin

[1] https://gitlab.freedesktop.org/bentiss/hid/-/jobs/49754306

For reference, the v2 cover letter:

| Hi, I am sending this series on behalf of myself and Benjamin Tissoires. There
| existed an initial n=3 patch series which was later expanded to n=4 and
| is now back to n=3 with some fixes added in and rebased against
| mainline.
|
| This patch series aims to ensure that the hid/bpf selftests can be built
| without errors.
|
| Here's Benjamin's initial cover letter for context:
| |  These fixes have been triggered by [0]:
| |  basically, if you do not recompile the kernel first, and are
| |  running on an old kernel, vmlinux.h doesn't have the required
| |  symbols and the compilation fails.
| |
| |  The tests will fail if you run them on that very same machine,
| |  of course, but the binary should compile.
| |
| |  And while I was sorting out why it was failing, I realized I
| |  could do a couple of improvements on the Makefile.
| |
| |  [0] https://lore.kernel.org/linux-input/56ba8125-2c6f-a9c9-d498-0ca1c153dcb2@redhat.com/T/#t

Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
---
Changes in v3:
- Also overwrite all of the enum symbols in patch 1/3
- Link to v2: https://lore.kernel.org/r/20230908-kselftest-09-08-v2-0-0def978a4c1b@google.com

Changes in v2:
- roll Justin's fix into patch 1/3
- add __attribute__((preserve_access_index)) (thanks Eduard)
- rebased onto mainline (2dde18cd1d8fac735875f2e4987f11817cc0bc2c)
- Link to v1: https://lore.kernel.org/r/20230825-wip-selftests-v1-0-c862769020a8@kernel.org

Link: https://github.com/ClangBuiltLinux/linux/issues/1698
Link: https://github.com/ClangBuiltLinux/continuous-integration2/issues/61

---
Benjamin Tissoires (3):
      selftests/hid: ensure we can compile the tests on kernels pre-6.3
      selftests/hid: do not manually call headers_install
      selftests/hid: force using our compiled libbpf headers

 tools/testing/selftests/hid/Makefile               | 10 ++-
 tools/testing/selftests/hid/progs/hid.c            |  3 -
 .../testing/selftests/hid/progs/hid_bpf_helpers.h  | 77 ++++++++++++++++++++++
 3 files changed, 81 insertions(+), 9 deletions(-)
---
base-commit: 29aa98d0fe013e2ab62aae4266231b7fb05d47a2
change-id: 20230825-wip-selftests-9a7502b56542

Best regards,
-- 
Benjamin Tissoires <bentiss@kernel.org>