Re: [PATCH 12/14] dma-direct: handle the memory encryption bit in common code

[Christoph Hellwig]

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.