Re: [PATCH bpf-next] selftests/bpf: Fix building error when using userspace pt_regs

[Andrii Nakryiko]

On Tue, Dec 14, 2021 at 5:54 AM Pu Lehui <pulehui@xxxxxxxxxx> wrote:
>
> When building bpf selftests on arm64, the following error will occur:
>
> progs/loop2.c:20:7: error: incomplete definition of type 'struct
> user_pt_regs'
>
> Some archs, like arm64 and riscv, use userspace pt_regs in
> bpf_tracing.h, which causes build failure when bpf prog use
> macro in bpf_tracing.h. So let's use vmlinux.h directly.

We could probably also extend bpf_tracing.h to work with
kernel-defined pt_regs, just like we do for x86 (see __KERNEL__ and
__VMLINUX_H__ checks). It's more work, but will benefit other end
users, not just selftests.

>
> Signed-off-by: Pu Lehui <pulehui@xxxxxxxxxx>
> ---
>  tools/testing/selftests/bpf/progs/loop1.c     |  8 ++------
>  tools/testing/selftests/bpf/progs/loop2.c     |  8 ++------
>  tools/testing/selftests/bpf/progs/loop3.c     |  8 ++------
>  tools/testing/selftests/bpf/progs/loop6.c     | 20 ++++++-------------
>  .../selftests/bpf/progs/test_overhead.c       |  8 ++------
>  .../selftests/bpf/progs/test_probe_user.c     |  6 +-----
>  6 files changed, 15 insertions(+), 43 deletions(-)
>

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