[RFC PATCH v0 0/5] powerpc/mm/radix: Memory unplug fixes

[Bharata B Rao <bharata@linux.ibm.com>]

Memory unplug has a few bugs which I had attempted to fix ealier
at https://lists.ozlabs.org/pipermail/linuxppc-dev/2019-July/194087.html

Now with Leonardo's patch for PAPR changes that add a separate flag bit
to LMB flags for explicitly identifying hot-removable memory
(https://lore.kernel.org/linuxppc-dev/f55a7b65a43cc9dc7b22385cf9960f8b11d5ce2e.camel@linux.ibm.com/T/#t),
a few other issues around memory unplug on radix can be fixed. This
series is a combination of those fixes.

This series works on top of above mentioned Leonardo's patch.

Bharata B Rao (5):
  powerpc/pseries/hotplug-memory: Set DRCONF_MEM_HOTREMOVABLE for
    hot-plugged mem
  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
  powerpc/mm/radix: Remove split_kernel_mapping()

 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      | 186 +++++++++++-------
 arch/powerpc/mm/mem.c                         |   5 +
 arch/powerpc/mm/pgtable-frag.c                |   9 +-
 .../platforms/pseries/hotplug-memory.c        |   6 +-
 8 files changed, 167 insertions(+), 83 deletions(-)

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2.21.0