Peter Zijlstra <pet...@infradead.org> wrote on 10/30/2013 01:25:26 PM:
> Also, I'm not entirely sure on C, that too seems like a dependency, we > simply cannot read the buffer @tail before we've read the tail itself, > now can we? Similarly we cannot compare tail to head without having the > head read completed. No, this one we cannot omit, because our problem on consumer side is not with @tail, which is written exclusively by consumer, but with @head. BTW, it is why you also don't need ACCESS_ONCE() around @tail, but only around @head read. -- Victor _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
