netdev - Re: [PATCH v2 bpf] selftests/bpf: fix bpf_target

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Date:   Wed, 10 Jul 2019 08:58:15 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Ilya Leoshkevich <iii@...ux.ibm.com>
Cc:     bpf <bpf@...r.kernel.org>, Networking <netdev@...r.kernel.org>
Subject: Re: [PATCH v2 bpf] selftests/bpf: fix bpf_target_sparc check

On Wed, Jul 10, 2019 at 4:57 AM Ilya Leoshkevich <iii@...ux.ibm.com> wrote:
>
> bpf_helpers.h fails to compile on sparc: the code should be checking
> for defined(bpf_target_sparc), but checks simply for bpf_target_sparc.
>
> Also change #ifdef bpf_target_powerpc to #if defined() for consistency.
>
> Signed-off-by: Ilya Leoshkevich <iii@...ux.ibm.com>
> ---

Thanks!

Acked-by: Andrii Nakryiko <andriin@...com>

>
> v1->v2: bpf_target_powerpc change
>
>  tools/testing/selftests/bpf/bpf_helpers.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/tools/testing/selftests/bpf/bpf_helpers.h b/tools/testing/selftests/bpf/bpf_helpers.h
> index 5f6f9e7aba2a..0214797518ce 100644
> --- a/tools/testing/selftests/bpf/bpf_helpers.h
> +++ b/tools/testing/selftests/bpf/bpf_helpers.h
> @@ -440,10 +440,10 @@ static int (*bpf_skb_adjust_room)(void *ctx, __s32 len_diff, __u32 mode,
>
>  #endif
>
> -#ifdef bpf_target_powerpc
> +#if defined(bpf_target_powerpc)

Oh, yeah, that mix of #ifdef and #if definitely threw me off. I prefer
consistency, so thanks for this update!

>  #define BPF_KPROBE_READ_RET_IP(ip, ctx)                ({ (ip) = (ctx)->link; })
>  #define BPF_KRETPROBE_READ_RET_IP              BPF_KPROBE_READ_RET_IP
> -#elif bpf_target_sparc
> +#elif defined(bpf_target_sparc)
>  #define BPF_KPROBE_READ_RET_IP(ip, ctx)                ({ (ip) = PT_REGS_RET(ctx); })
>  #define BPF_KRETPROBE_READ_RET_IP              BPF_KPROBE_READ_RET_IP
>  #else
> --
> 2.21.0
>