Now that kernel 3.8.0 is officially released, 'tis the season for Linus to start breaking all of the third-party kernel modules he can, and virtualbox- modules is the first (nvidia.ko and other kernel modules to follow, probably ;)
Virtualbox-modules fails to build against today's kernel.git update from Linus, with an error message that "MAX_PRIO is undefined" in thread2-r0drv-linux.c. The fix is happily very simple because he moved the definition of MAX_PRIO into <linux/init_task.h>, so all you need to do is to add that include near the top of thread2-r0drv-linux.c.
