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61779ce0a1
Recent versions of sphinx will emit messages like:
doc/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.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Rebased for U-Boot
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>