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

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On Mon, Sep 13, 2021 at 6:37 PM Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
>
> Hi all,
>
> After merging the bpf-next tree, today's linux-next build (perf) failed
> like this:
>
> util/bpf-event.c: In function 'btf__load_from_kernel_by_id':
> util/bpf-event.c:27:8: error: 'btf__get_from_id' is deprecated: libbpf v0.6+: use btf__load_from_kernel_by_id instead [-Werror=deprecated-declarations]
>    27 |        int err = btf__get_from_id(id, &btf);
>       |        ^~~
> In file included from util/bpf-event.c:5:
> /home/sfr/next/next/tools/lib/bpf/btf.h:54:16: note: declared here
>    54 | LIBBPF_API int btf__get_from_id(__u32 id, struct btf **btf);
>       |                ^~~~~~~~~~~~~~~~
> cc1: all warnings being treated as errors
>
> Caused by commit
>
>   0b46b7550560 ("libbpf: Add LIBBPF_DEPRECATED_SINCE macro for scheduling API deprecations")

Should be fixed by [0], when applied to perf tree. Thanks for reporting!

  [0] https://patchwork.kernel.org/project/netdevbpf/patch/20210914170004.4185659-1-andrii@xxxxxxxxxx/

>
> I have used the bpf-next tree from next-20210913 for today.
>
> --
> Cheers,
> Stephen Rothwell



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