A (nearly) mainline kernel running on the Nexus 7

As was discussed at the 2015 Kernel Summit,there are essentially no commercial Android devices running mainlinekernels. At the recently concluded Linaro Connect event, though, JohnStultz demonstrateda Nexus 7 tablet running mainline with just a few patches. Iteven has accelerated graphics via the freedreno driver."This is really great, because we now have a very-close to mainlinetest bed on a actual consumer device. So we can make sure upstream doesn'tintroduce any regressions (just recently, two ABI breaks that affectedandroid were recently caught) and allows us to make sure when we pushAndroid functionality upstream, that any interface changes required bymaintainers can be properly tested to make sure what lands upstream reallyworks."