[$] An end to uniprocessor configurations

The Linux kernel famously scales from the smallest of systems to massiveservers with thousands of CPUs. It was not always that way, though; theinitial version of the kernel could only manage a single processor. Thatlimitation was lifted, obviously, but single-processor machines have alwaysbeen treated specially in the scheduler. That longstanding situation maysoon come to an end, though, if this patchseries from Ingo Molnar makes it upstream.