On Mon, Mar 19, 2018 at 03:19:04PM +0000, Robin Murphy wrote: > As a heads-up, I've just realised there's now a silent (but build-breaking) > conflict with the current arm64 queue brewing here, as we've unfortunately > had to reintroduce ARCH_HAS_PHYS_TO_DMA as a means of being safe against an > ugly architectural corner case - currently commit 1f85b42a691c ("arm64: > Revert L1_CACHE_SHIFT back to 6 (64-byte cache line size)") in -next.
Please revert that arm64 commit. This condition should be handled in common code as it is not arm specific. And next time please CC the iommu list and dma-mapping maintainers before doing such a change.