Make sure global arrays of bpf_rb_root and fields of bpf_rb_root in nested struct types work correctly. Signed-off-by: Kui-Feng Lee <thinker.li@gmail.com> Link: https://lore.kernel.org/r/20240523174202.461236-9-thinker.li@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>