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__ro_after_init is no longer new and under development. Update the document to reflect the correct status. Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> Link: https://lore.kernel.org/r/20211208164051.8783-1-skhan@linuxfoundation.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>