On Tue, 2014-11-18 at 17:24 -0800, Alexander Duyck wrote: > There are a number of situations where the mandatory barriers rmb() and > wmb() are used to order memory/memory operations in the device drivers > and those barriers are much heavier than they actually need to be. For > example in the case of PowerPC wmb() calls the heavy-weight sync > instruction when for coherent memory operations all that is really needed > is an lsync or eieio instruction. > .../... For powerpc: Acked-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> -- 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
