Hi Andrew, please consider this series for 4.18.
For maintainability, as ZONE_DEVICE continues to attract new users, it is useful to keep all users consolidated on devm_memremap_pages() as the interface for create "device pages".
The devm_memremap_pages() implementation was recently reworked to make it more generic for arbitrary users, like the proposed peer-to-peer PCI-E enabling. HMM pre-dated this rework and opted to duplicate devm_memremap_pages() as hmm_devmem_pages_create().
Rework HMM to be a consumer of devm_memremap_pages() directly and fix up the licensing on the exports given the deep dependencies on the mm.
Patches based on v4.17-rc6 where there are no upstream consumers of the HMM functionality.
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Dan Williams (5): mm, devm_memremap_pages: mark devm_memremap_pages() EXPORT_SYMBOL_GPL mm, devm_memremap_pages: handle errors allocating final devres action mm, hmm: use devm semantics for hmm_devmem_{add,remove} mm, hmm: replace hmm_devmem_pages_create() with devm_memremap_pages() mm, hmm: mark hmm_devmem_{add,add_resource} EXPORT_SYMBOL_GPL
Documentation/vm/hmm.txt | 1 include/linux/hmm.h | 4 - include/linux/memremap.h | 1 kernel/memremap.c | 39 +++++- mm/hmm.c | 297 +++++++--------------------------------------- 5 files changed, 77 insertions(+), 265 deletions(-)