On Wed, Oct 04, 2017 at 07:17:45AM -0700, Paul E. McKenney wrote: > If you use READ_ONCE(), then all architectures I know of enforce > full ordering for accesses to a single variable. (If you don't use > READ_ONCE(), then in theory Itanium can reorder reads.) Me, I would > argue for WRITE_ONCE() as well to prevent store tearing.
Note that the stores are either cmpxchg() or smp_store_release() both of which imply a WRITE_ONCE().
