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Date:   Tue, 8 Sep 2020 10:54:12 -0700
From:   Andrii Nakryiko <andriin@...com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Networking <netdev@...r.kernel.org>
CC:     Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the bpf-next tree

On 9/7/20 8:08 PM, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the bpf-next tree, today's linux-next build (powerpcle perf)
> failed like this:
> 
> util/bpf-loader.c: In function 'config_bpf_program':
> util/bpf-loader.c:331:2: error: 'bpf_program__title' is deprecated: BPF program title is confusing term; please use bpf_program__section_name() instead [-Werror=deprecated-declarations]
>    331 |  config_str = bpf_program__title(prog, false);
>        |  ^~~~~~~~~~
> In file included from util/bpf-loader.c:10:
> tools/lib/bpf/libbpf.h:203:13: note: declared here
>    203 | const char *bpf_program__title(const struct bpf_program *prog, bool needs_copy);
>        |             ^~~~~~~~~~~~~~~~~~
> util/bpf-loader.c: In function 'preproc_gen_prologue':
> util/bpf-loader.c:457:3: error: 'bpf_program__title' is deprecated: BPF program title is confusing term; please use bpf_program__section_name() instead [-Werror=deprecated-declarations]
>    457 |   title = bpf_program__title(prog, false);
>        |   ^~~~~
> In file included from util/bpf-loader.c:10:
> tools/lib/bpf/libbpf.h:203:13: note: declared here
>    203 | const char *bpf_program__title(const struct bpf_program *prog, bool needs_copy);
>        |             ^~~~~~~~~~~~~~~~~~
> cc1: all warnings being treated as errors
> 
> Caused or exposed by commit
> 
>    521095842027 ("libbpf: Deprecate notion of BPF program "title" in favor of "section name"")
> 
> I have used the bpf-next tree from next-20200903 for today.
> 

perf code is using deprecated bpf_program__title() API. I'll send a 
patch for bpf-next to replace it with bpf_program__section_name(). 
Thanks for letting me know about build warning!

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