Working on a new project that's unfortunately going to require some changes to the linux kernel. Lived a lot of my life in the embedded world, haven't touched a *NIX kernel since 4.3BSD. Am writing a travelogue as I find my way around the code. Wasn't planning another book but this might end up being one. Anyway, a few questions... Was looking at the filesystem super_block structure. A large number of the members of the structure (but not all) begin with a s_ prefix, and some of the member names are in the 20 character long range. I recall that using prefixes was necessary before structures and unions had their own independent namespaces. But I also seem to recall that that was fixed before long identifier names happened. Does anybody remember the ordering for these two events? Also, anybody know where the term superblock originated? With what filesystem? Jon