[PATCH v1 0/3] powerpc/mm/radix: Memory unplug fixes

[Bharata B Rao]

This is the next version of the fixes for memory unplug on radix.
The issues and the fix are described in the actual patches.

Changes in v1:
==============
- Rebased to latest kernel.
- Took care of p4d changes.
- Addressed Aneesh's review feedback:
 - Added comments.
 - Indentation fixed.
- Dropped the 1st patch (setting DRCONF_MEM_HOTREMOVABLE lmb flags) as
  it is debatable if this flag should be set in the device tree by OS
  and not by platform in case of hotplug. This can be looked at separately.
  (The fixes in this patchset remain valid without the dropped patch)
- Dropped the last patch that removed split_kernel_mapping() to ensure
  that spilitting code is available for any radix guest running on
  platforms that don't set DRCONF_MEM_HOTREMOVABLE.

v0: https://lore.kernel.org/linuxppc-dev/20200406034925.22586-1-bharata@linux.ibm.com/

Bharata B Rao (3):
  powerpc/mm/radix: Create separate mappings for hot-plugged memory
  powerpc/mm/radix: Fix PTE/PMD fragment count for early page table
    mappings
  powerpc/mm/radix: Free PUD table when freeing pagetable

 arch/powerpc/include/asm/book3s/64/pgalloc.h |  11 +-
 arch/powerpc/include/asm/book3s/64/radix.h   |   1 +
 arch/powerpc/include/asm/sparsemem.h         |   1 +
 arch/powerpc/mm/book3s64/pgtable.c           |  31 +++++-
 arch/powerpc/mm/book3s64/radix_pgtable.c     | 111 +++++++++++++++++--
 arch/powerpc/mm/mem.c                        |   5 +
 arch/powerpc/mm/pgtable-frag.c               |   9 +-
 7 files changed, 157 insertions(+), 12 deletions(-)

-- 
2.21.3