libbpf: Initialize err in probe_map_create
GCC-11 warns about the possibly unitialized err variable in
probe_map_create:
libbpf_probes.c: In function 'probe_map_create':
libbpf_probes.c:361:38: error: 'err' may be used uninitialized in this function [-Werror=maybe-uninitialized]
361 | return fd < 0 && err == exp_err ? 1 : 0;
| ~~~~^~~~~~~~~~
Fixes: 878d8def06
("libbpf: Rework feature-probing APIs")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/bpf/20220801025109.1206633-1-f.fainelli@gmail.com
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@ -193,7 +193,7 @@ static int probe_map_create(enum bpf_map_type map_type)
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LIBBPF_OPTS(bpf_map_create_opts, opts);
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int key_size, value_size, max_entries;
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__u32 btf_key_type_id = 0, btf_value_type_id = 0;
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int fd = -1, btf_fd = -1, fd_inner = -1, exp_err = 0, err;
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int fd = -1, btf_fd = -1, fd_inner = -1, exp_err = 0, err = 0;
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key_size = sizeof(__u32);
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value_size = sizeof(__u32);
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