On Tue, 2 Aug 2016, Eric Auger wrote:

Currently the MSI message is composed by directly calling
irq_chip_compose_msi_msg and erased by setting the memory to zero.

On some platforms, we will need to complexify this composition to
properly handle MSI emission through IOMMU. Also we will need to track
when the MSI message is erased.

I just can't find how you do that. After applying the series the

+	if (erase)
+		memset(msg, 0, sizeof(*msg));

branch is still just a memset(). The wrapper is fine for the compose side, but
having the extra argument just to wrap the memset() for no gain is silly.

Thanks,

	tglx