Add a few positive/negative tests to test bpf_rcu_read_lock()
and its corresponding verifier support. The new test will fail
on s390x and aarch64, so an entry is added to each of their
respective deny lists.
Acked-by: NMartin KaFai Lau <martin.lau@kernel.org>
Signed-off-by: NYonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/r/20221124053222.2374650-1-yhs@fb.comSigned-off-by: NAlexei Starovoitov <ast@kernel.org>