disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

 kernel/Documentation/admin-guide/hw-vuln/tsx_async_abort.rst
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 The mitigation can be controlled at boot time via a kernel command line option.
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 See :ref:`taa_mitigation_control_command_line`.
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-.. _virt_mechanism:
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-
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 Virtualization mitigation
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 ^^^^^^^^^^^^^^^^^^^^^^^^^
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