doc: Cope with Sphinx logging deprecations
commit 096ea522e84ea68f8e6c41e5e7294731a81e29bc upstream. Recent versions of sphinx will emit messages like: Documentation/sphinx/kerneldoc.py:103: RemovedInSphinx20Warning: app.warning() is now deprecated. Use sphinx.util.logging instead. Switch to sphinx.util.logging to make this unsightly message go away. Alas, that interface was only added in version 1.6, so we have to add a version check to keep things working with older sphinxes. Cc: stable@vger.kernel.org Signed-off-by: NJonathan Corbet <corbet@lwn.net> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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Documentation/sphinx/kernellog.py
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