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Date:   Tue, 18 Aug 2020 10:04:29 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Andrii Nakryiko <andriin@...com>
Cc:     bpf <bpf@...r.kernel.org>,
        Network Development <netdev@...r.kernel.org>,
        Alexei Starovoitov <ast@...com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii.nakryiko@...il.com>,
        Kernel Team <kernel-team@...com>
Subject: Re: [PATCH bpf] libbpf: fix build on ppc64le architecture

On Tue, Aug 18, 2020 at 9:47 AM Andrii Nakryiko <andriin@...com> wrote:
>
> On ppc64le we get the following warning:
>
>   In file included from btf_dump.c:16:0:
>   btf_dump.c: In function ‘btf_dump_emit_struct_def’:
>   ../include/linux/kernel.h:20:17: error: comparison of distinct pointer types lacks a cast [-Werror]
>     (void) (&_max1 == &_max2);  \
>                    ^
>   btf_dump.c:882:11: note: in expansion of macro ‘max’
>       m_sz = max(0LL, btf__resolve_size(d->btf, m->type));
>              ^~~
>
> Fix by explicitly casting to __s64, which is a return type from
> btf__resolve_size().
>
> Fixes: 702eddc77a90 ("libbpf: Handle GCC built-in types for Arm NEON")
> Signed-off-by: Andrii Nakryiko <andriin@...com>

Applied. Thanks

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