On Tue, Nov 25, 2014 at 04:26:28PM +0000, Alexander Duyck wrote: > On 11/25/2014 06:01 AM, Will Deacon wrote: > > If we ever see platforms using Linux/dma_alloc_coherent with devices > > mastering from a different outer-shareable domain that the one containing > > the CPUs, then we'll need to revisit this. > > Would we just need a system wide memory barrier in that case instead of > an outer shareable memory barrier, or would we need to look as something > like a sync barrier? I think dmb(sy) would do the trick, but let's cross that bridge if/when we have to. Will -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
