On Mon, Nov 20, 2017 at 06:05:55PM +0000, Will Deacon wrote: > This is a thorny issue, but RCU (specifically rcu_dereference but probably > also some READ_ONCEs) relies on being able to utilise syntactic dependency > chains to order local accesses to shared variables. Well, we used to have READ_ONCE() and smp_read_barrier_depends(), but we recently munged them together, in the process getting rid of lockless_dereference(). So for sure, READ_ONCE() must be able to do the address dependency thing, otherwise tons of code comes apart. -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
