On Mon, May 21, 2018 at 03:35:34PM -0700, Dan Williams wrote: > Commit e8d513483300 "memremap: change devm_memremap_pages interface to > use struct dev_pagemap" refactored devm_memremap_pages() to allow a > dev_pagemap instance to be supplied. Passing in a dev_pagemap interface > simplifies the design of pgmap type drivers in that they can rely on > container_of() to lookup any private data associated with the given > dev_pagemap instance. > > In addition to the cleanups this also gives hmm users multi-order-radix > improvements that arrived with commit ab1b597ee0e4 "mm, > devm_memremap_pages: use multi-order radix for ZONE_DEVICE lookups" None of them has any caller despite being in the tree for 9 month. I think it's time to simply drop the whole hmm code instead instead of carrying this dead weight around.
