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Test cases we care about and ensure improper usage is caught and
rejected by the verifier.
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20220721134245.2450-13-memxor@gmail.com

Signed-off-by: Alexei Starovoitov <ast@kernel.org>