[PATCH v3 0/2] Add DAX ABI for memmap_on_memory

[Vishal Verma]

The DAX drivers were missing sysfs ABI documentation entirely.  Add this
missing documentation for the sysfs ABI for DAX regions and Dax devices
in patch 1. Add a new ABI for toggling memmap_on_memory semantics in
patch 2.

The missing ABI was spotted in [1], this series is a split of the new
ABI additions behind the initial documentation creation.

[1]: https://lore.kernel.org/linux-cxl/651f27b728fef_ae7e7294b3@xxxxxxxxxxxxxxxxxxxxxxxxx.notmuch/

Changes in v3:
- Fix typo in ABI docs (Zhijian Li)
- Add kernel config and module parameter dependencies to the ABI docs
  entry (David Hildenbrand)
- Ensure kmem isn't active when setting the sysfs attribute (Ying
  Huang)
- Simplify returning from memmap_on_memory_store()
- Link to v2: https://lore.kernel.org/r/20231206-vv-dax_abi-v2-0-f4f4f2336d08@xxxxxxxxx

Changes in v2:
- Fix CC lists, patch 1/2 didn't get sent correctly in v1
- Link to v1: https://lore.kernel.org/r/20231206-vv-dax_abi-v1-0-474eb88e201c@xxxxxxxxx

---
Vishal Verma (2):
      Documentatiion/ABI: Add ABI documentation for sys-bus-dax
      dax: add a sysfs knob to control memmap_on_memory behavior

 drivers/dax/bus.c                       |  47 +++++++++
 Documentation/ABI/testing/sysfs-bus-dax | 168 ++++++++++++++++++++++++++++++++
 2 files changed, 215 insertions(+)
---
base-commit: c4e1ccfad42352918810802095a8ace8d1c744c9
change-id: 20231025-vv-dax_abi-17a219c46076

Best regards,
-- 
Vishal Verma <vishal.l.verma@xxxxxxxxx>