[PATCH v2 0/3] Fix and enable pmem as RAM device on arm64

[Jia He]

This fix a few issues when I tried to enable pmem as RAM device on arm64.

Tested on ThunderX2 host/qemu "-M virt" guest with a nvdimm device. The 
memblocks from the dax pmem device can be either hot-added or hot-removed
on arm64 guest.

Changes:
v2: - Drop unneccessary patch to harden try_offline_node
    - Use new solution(by David) to fix dev->target_node=-1 during probing
    - Refine the mem_hotplug_begin/done patch

v1: https://lkml.org/lkml/2020/7/5/381

Jia He (3):
  arm64/numa: export memory_add_physaddr_to_nid as EXPORT_SYMBOL_GPL
  device-dax: use fallback nid when numa_node is invalid
  mm/memory_hotplug: fix unpaired mem_hotplug_begin/done

 arch/arm64/mm/numa.c |  5 +++--
 drivers/dax/kmem.c   | 22 ++++++++++++++--------
 mm/memory_hotplug.c  |  5 ++---
 3 files changed, 19 insertions(+), 13 deletions(-)

-- 
2.17.1