Linux kernel documentation switched to ReStructuredText
In the end, Sphinx and reStructuredText are emerging as the future of Linux kernel documentation, with far more ambitious goals than the original AsciiDoc support patches ever had. [..] "Honestly, in the end I think we could make either tool do what is needed of it. However, my impression after trying to do a document that needs to have nice publishable output with both tools is that Sphinx is easier to work with, simpler to extend, better supported." In the end, Jonathan's verdict was to go with Sphinx. The patches have been merged, and the first Sphinx-based documentation will appear in the 4.8 kernel. (Jul. 2016)