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Subject[PATCH v3 0/8] mm: Rework hmm to use devm_memremap_pages and other fixes
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Date
Changes since v2 [1]:
* Rebased on v4.18-rc1
* Collect Logan's reviewed-by for "mm, devm_memremap_pages: Add
MEMORY_DEVICE_PRIVATE support"
* Convert __put_devmap_managed_page and devmap_managed_key to
EXPORT_SYMBOL otherwise put_page() becomes limited to GPL-only
modules.
* Clarify some of the changelogs.

[1]: https://lkml.org/lkml/2018/5/23/24

---

Hi Andrew, here's v3 to replace these 5 currently in mm:

mm-devm_memremap_pages-mark-devm_memremap_pages-export_symbol_gpl.patch
mm-devm_memremap_pages-handle-errors-allocating-final-devres-action.patch
mm-hmm-use-devm-semantics-for-hmm_devmem_add-remove.patch
mm-hmm-replace-hmm_devmem_pages_create-with-devm_memremap_pages.patch
mm-hmm-mark-hmm_devmem_add-add_resource-export_symbol_gpl.patch

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 v4.18-rc1 where there are no upstream consumers of the
HMM functionality.

---

Dan Williams (8):
mm, devm_memremap_pages: Mark devm_memremap_pages() EXPORT_SYMBOL_GPL
mm, devm_memremap_pages: Kill mapping "System RAM" support
mm, devm_memremap_pages: Fix shutdown handling
mm, devm_memremap_pages: Add MEMORY_DEVICE_PRIVATE support
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
mm: Fix exports that inadvertently make put_page() EXPORT_SYMBOL_GPL


drivers/dax/pmem.c | 10 -
drivers/nvdimm/pmem.c | 18 +-
include/linux/hmm.h | 4
include/linux/memremap.h | 7 +
kernel/memremap.c | 89 +++++++----
mm/hmm.c | 307 +++++--------------------------------
tools/testing/nvdimm/test/iomap.c | 21 ++-
7 files changed, 132 insertions(+), 324 deletions(-)

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