powerpc/mm: Add comments to the vmemmap layout

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Add some explaination to the layout of vmemmap virtual address
space and how physical page mapping is only used for valid PFNs
present at any point on the system.

Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Anshuman Khandual 2017-04-06 19:44:49 +05:30 • committed by Michael Ellerman

parent c642af9c41

commit b0f36c10de

1 changed files with 75 additions and 0 deletions

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arch/powerpc/mm/pgtable-hash64.c

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