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Add test validating that libbpf adjusts (and reflects adjusted) ringbuf size early, before bpf_object is loaded. Also make sure we can't successfully resize ringbuf map after bpf_object is loaded. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/r/20220715230952.2219271-2-andrii@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>