I am looking for information on any kernel interfaces (e.g. /sys paths, /proc paths, anything else I can grep for) that will not be supported anymore on the Neo900 for whatever reason

I intend to use this information to identify any binaries on the stock Fremantle system that use these no-longer-supported interfaces and produce a list so we know which ones we need to clone-and-rewrite, which ones we need to change the source of and which ones we need to hack directly (e.g. binary patching, LD_PRELOAD etc)