Cc: linux-mm@xxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Michal Nazarewicz <mina86@xxxxxxxxxx>, Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>, Vlastimil Babka <vbabka@xxxxxxx>, Christoph Hellwig <hch@xxxxxx>, Michal Hocko <mhocko@xxxxxxxx>, Russell King <linux@xxxxxxxxxxxxxxx>, Catalin Marinas <catalin.marinas@xxxxxxx>, Will Deacon <will.deacon@xxxxxxx>, Paul Mackerras <paulus@xxxxxxxxxx>, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, Chris Zankel <chris@xxxxxxxxxx>, Martin Schwidefsky <schwidefsky@xxxxxxxxxx>, Joerg Roedel <joro@xxxxxxxxxx>, Sumit Semwal <sumit.semwal@xxxxxxxxxx>, Robin Murphy <robin.murphy@xxxxxxx>, Laura Abbott <labbott@xxxxxxxxxx>, linaro-mm-sig@xxxxxxxxxxxxxxxx