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For PR_SPEC_STORE_BYPASS and PR_SPEC_INDIRECT_BRANCH, PR_SPEC_DISABLE means "disable the speculation bug" i.e. "enable the mitigation". For PR_SPEC_L1D_FLUSH, PR_SPEC_DISABLE means "disable the mitigation". This is not obvious, so document it. Signed-off-by: Brendan Jackman <jackmanb@google.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Message-ID: <20251015-l1d-flush-doc-v1-1-f8cefea3f2f2@google.com>