On Thu, Dec 17, 2015 at 04:34:57PM +0200, Michael S. Tsirkin wrote: > On Thu, Dec 17, 2015 at 03:02:12PM +0100, Peter Zijlstra wrote:
> > > commit 9e1a27ea42691429e31f158cce6fc61bc79bb2e9 > > > Author: Alexander Duyck <alexander.h.du...@redhat.com> > > > Date: Mon Apr 13 21:03:49 2015 +0930 > > > > > > virtio_ring: Update weak barriers to use dma_wmb/rmb > > > > That commit doesn't make any sense. dma_*mb() explicitly does _NOT_ > > cover the smp_*mb() part. > > > > Again, look at the ARM definitions, the smp_*mb() primitives use the > > inner coherence stuff, while the dma_*mb() primitives use the outer > > coherent stuff. > > Does outer coherent imply inner coherent? > > > the *mb() primitives cover both. I do not think so, but lets add Will, he dreams this stuff. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
