powerpc/mm: Fix memory hotplug BUG() on radix

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[ Upstream commit 32b53c012e ]

Memory hotplug is leading to hash page table calls, even on radix:

  arch_add_memory
    create_section_mapping
      htab_bolt_mapping
        BUG_ON(!ppc_md.hpte_insert);

To fix, refactor {create,remove}_section_mapping() into hash__ and
radix__ variants. Leave the radix versions stubbed for now.

Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Reza Arbab <arbab@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Reza Arbab 2017-01-03 14:39:51 -06:00 • committed by Greg Kroah-Hartman

parent a88ff235e8

commit 57e76dbbc5

3 changed files with 24 additions and 2 deletions

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4

arch/powerpc/include/asm/book3s/64/hash.h

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4

arch/powerpc/mm/hash_utils_64.c

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18

arch/powerpc/mm/pgtable-book3s64.c

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