linux-kernel - Re: [PATCH bpf-next] bpf: Fix bpf-next builds without CONFIG_BPF

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Message-ID: <CAADnVQJFk5mgy1oFmz=6hBZHxjPvmQp81rWU_gY5MYi0tZoipg@mail.gmail.com>
Date:   Wed, 25 Aug 2021 19:45:45 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Daniel Xu <dxu@...uu.xyz>
Cc:     bpf <bpf@...r.kernel.org>, Alexei Starovoitov <ast@...nel.org>,
        Kernel Team <kernel-team@...com>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH bpf-next] bpf: Fix bpf-next builds without CONFIG_BPF_EVENTS

On Wed, Aug 25, 2021 at 6:48 PM Daniel Xu <dxu@...uu.xyz> wrote:
>
> This commit fixes linker errors along the lines of:
>
>     s390-linux-ld: task_iter.c:(.init.text+0xa4): undefined reference to `btf_task_struct_ids'`
>
> Fix by defining btf_task_struct_ids unconditionally in kernel/bpf/btf.c
> since there exists code that unconditionally uses btf_task_struct_ids.
>
> Reported-by: kernel test robot <lkp@...el.com>
> Signed-off-by: Daniel Xu <dxu@...uu.xyz>

Applied. Thanks