libbpf: Fix build on ppc64le architecture
authorAndrii Nakryiko <andriin@fb.com>
Tue, 18 Aug 2020 16:44:56 +0000 (09:44 -0700)
committerAlexei Starovoitov <ast@kernel.org>
Tue, 18 Aug 2020 17:02:52 +0000 (10:02 -0700)
commit3fb1a96a91120877488071a167d26d76be4be977
treebe7f1711c23b8fab9b1b0acd22b2e12bc542c35e
parentcf28f3bbfca097d956f9021cb710dfad56adcc62
libbpf: Fix build on ppc64le architecture

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@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200818164456.1181661-1-andriin@fb.com
tools/lib/bpf/btf_dump.c