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

From: Stephen Rothwell <[email-masked]>
Date: Wed, 15 Sep 2021 09:38:02 +1000

Hi Andrii,

On Tue, 14 Sep 2021 16:25:55 -0700 Andrii Nakryiko <[email-masked]> wrote:
>
> On Mon, Sep 13, 2021 at 6:37 PM Stephen Rothwell <[email-masked]> wrote:
> >
> > 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/[email-masked]/

That really needs to be applied to the bpf-next tree (presumably with
the appropriate Acks).

-- 
Cheers,
Stephen Rothwell