[$] Kernel code on the chopping block

Code that is added to the kernel can stay there for a long time; there iscode in current kernels that has been present for over 30 years.Nothing is forever, though. The kernel development community is currentlydiscussing the removal of two architectures and one filesystem, all ofwhich seem to have mostly fallen out of use. But, as we will see, removalof code from the kernel is not easy and is subject to reconsideration evenafter it happens.