powerpc: split hugepage when using subpage protection

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We find all the overlapping vma and mark them such that we don't allocate
hugepage in that range. Also we split existing huge page so that the
normal page hash can be invalidated and new page faulted in with new
protection bits.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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Aneesh Kumar K.V 2013-06-20 14:30:25 +05:30 • committed by Benjamin Herrenschmidt

parent a00e7bea0d

commit d8e355a20f

1 changed files with 48 additions and 0 deletions

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arch/powerpc/mm/subpage-prot.c

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