linux-kernel - Re: linux-next: build failure after merge of the bpf-next tree

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Date:   Tue, 19 Jul 2022 20:42:09 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Andrii Nakryiko <andrii@...nel.org>, bpf <bpf@...r.kernel.org>,
        Networking <netdev@...r.kernel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the bpf-next tree

On Tue, Jul 19, 2022 at 7:00 PM Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> Hi all,
>
> After merging the bpf-next tree, today's linux-next build (powerpc
> ppc64_defconfig) failed like this:
>
> ld: warning: discarding dynamic section .glink
> ld: warning: discarding dynamic section .plt
> ld: linkage table error against `bpf_trampoline_unlink_cgroup_shim'
> ld: stubs don't match calculated size
> ld: can not build stubs: bad value
> ld: kernel/bpf/cgroup.o: in function `.bpf_cgroup_link_release.part.0':
> cgroup.c:(.text+0x2fc4): undefined reference to `.bpf_trampoline_unlink_cgroup_shim'
> ld: kernel/bpf/cgroup.o: in function `.cgroup_bpf_release':
> cgroup.c:(.text+0x33b0): undefined reference to `.bpf_trampoline_unlink_cgroup_shim'
> ld: cgroup.c:(.text+0x33c0): undefined reference to `.bpf_trampoline_unlink_cgroup_shim'
>
> Caused by commit
>
>   3908fcddc65d ("bpf: fix lsm_cgroup build errors on esoteric configs")
>
> I have reverted that commit for today.

Argh.

Stan,

please take a look.