[PATCH 4/3] selftests/hid: more fixes to build with older kernel

[Justin Stitt]

On Fri, Aug 25, 2023 at 10:36:30AM +0200, Benjamin Tissoires wrote:
> 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@xxxxxxxxxx/T/#t
>
> Signed-off-by: Benjamin Tissoires <bentiss@xxxxxxxxxx>
> ---
> 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 ---
>  tools/testing/selftests/hid/progs/hid_bpf_helpers.h | 20 ++++++++++++++++++++
>  3 files changed, 24 insertions(+), 9 deletions(-)
> ---
> base-commit: 1d7546042f8fdc4bc39ab91ec966203e2d64f8bd
> change-id: 20230825-wip-selftests-9a7502b56542
>
> Best regards,
> --
> Benjamin Tissoires <bentiss@xxxxxxxxxx>
>

Benjamin, thanks for the work here. Your series fixed up _some_ of the
errors I had while building on my 6.3.11 kernel. I'm proposing a single
patch that should be applied on top of your series that fully fixes
_all_ of the build errors I'm experiencing.

Can you let me know if it works and potentially formulate a new series
so that `b4 shazam` applies it cleanly?

PATCH BELOW
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