linux-kernel - Re: [PATCH v3 0/3] selftests/hid: assorted fixes

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Date:   Thu, 05 Oct 2023 21:14:05 +0300
From:   Eduard Zingerman <eddyz87@...il.com>
To:     Benjamin Tissoires <bentiss@...nel.org>,
        Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Shuah Khan <shuah@...nel.org>,
        Justin Stitt <justinstitt@...gle.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     linux-input@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org, bpf@...r.kernel.org,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH v3 0/3] selftests/hid: assorted fixes

On Thu, 2023-10-05 at 17:55 +0200, Benjamin Tissoires wrote:
> > 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?

Hi Benjamin,

I think there is no need, I just took part in the discussion and that's all.
Feel free to ping me if there is anything BPF related that needs clarification.

Thanks,
Eduard

> > 
> > 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@...nel.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,