[PATCH v3 hmm 0/9] Small hmm_range_fault() cleanups

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From: Jason Gunthorpe <jgg@xxxxxxxxxxxx>

This is v3 with some minor adjustments made.

We are at the end of the dev cycle, and as nothing major has come up I'll push
this toward linux-next to get some coverage and decide next week what goes
this cycle.

v3 changes:
 - Keep NEED_WRITE_FAULT and NEED_FAULT separate (CH)
 - Use CH's vesion of hmm_can_fault and drop the inline
v2: https://lore.kernel.org/r/20200324011457.2817-1-jgg@xxxxxxxx
v1: https://lore.kernel.org/r/20200320164905.21722-1-jgg@xxxxxxxx

Thanks to everyone who looked on this,
Jason

Jason Gunthorpe (9):
  mm/hmm: remove pgmap checking for devmap pages
  mm/hmm: return the fault type from hmm_pte_need_fault()
  mm/hmm: remove unused code and tidy comments
  mm/hmm: remove HMM_FAULT_SNAPSHOT
  mm/hmm: remove the CONFIG_TRANSPARENT_HUGEPAGE #ifdef
  mm/hmm: use device_private_entry_to_pfn()
  mm/hmm: do not unconditionally set pfns when returning EBUSY
  mm/hmm: do not set pfns when returning an error code
  mm/hmm: return error for non-vma snapshots

 Documentation/vm/hmm.rst                |  12 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c |   2 +-
 drivers/gpu/drm/nouveau/nouveau_svm.c   |   2 +-
 include/linux/hmm.h                     | 109 +--------
 mm/hmm.c                                | 307 +++++++++---------------
 5 files changed, 128 insertions(+), 304 deletions(-)

-- 
2.25.2

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