>>968
rpi-update
https://github.com/Hexxeh/rpi-update

This gets you the latest bleeding edge kernel/firmware. There is
always the possibility of regressions.
Bug fixes and improvements will eventually make their way into
new Raspbian releases and apt-get when they are considered
sufficiently well tested.
A good reason for using this would be if you like to help with the
testing effort, and are happy to risk breakages and submit bug reports.
These testers are welcome.

本当にそれ必要なのか？