[$] Running a mainline kernel on a cellphone

One of the biggest freedoms associated with free software is the ability toreplace a program with an updated or modified version. Even so, of themany millions of people using Linux-powered phones, few are able torun a mainline kernel on those phones, even if they have the technicalskills to do the replacement. The sad fact is that no mainstream phoneavailable runs mainline kernels. A session at the 2015 Kernel Summit, ledby Rob Herring, explored this problem and what might be done to address it.