On Mon, Jul 01, 2019 at 12:39:35PM +0200, John Ogness wrote: > Thanks. I overlooked that subtle detail. Can I assume NMIs do not exist > on architectures that need to implement locking for cmpxchg()? Or did I > just hit a major obstacle?
I think that is a fair assumption, I'm not aware of anybody having NMIs _and_ 'broken' atomics. Then again, we also have ARCH_HAVE_NMI_SAFE_CMPXCHG.
