After commit 4f36c2d8 ("tracing: Increase tracing map KEYS_MAX size"),
'keys' supports up to three fields.
Signed-off-by: Zheng Yejian <zhengyejian1@huawei.com>
Cc: stable@vger.kernel.org
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Link: https://lore.kernel.org/r/20221017103806.2479139-1-zhengyejian1@huawei.comSigned-off-by: Jonathan Corbet <corbet@lwn.net>