[$] Lockless patterns: some final topics

So far, this series has covered five common lockless patterns in the Linuxkernel; those are probably the five that you will most likely encounterwhen working on Linux. Throughout this series, some details have been left out and somesimplifications were made in the name of clarity. In this finalinstallment, I will sort out some of these loose ends and try to answerwhat is arguably themost important question of all: when should you use the locklesspatterns that have been described here?