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mm: Update generic gup implementation to handle hugepage directory
authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Wed, 5 Nov 2014 16:27:40 +0000 (21:57 +0530)
committerMichael Ellerman <mpe@ellerman.id.au>
Fri, 14 Nov 2014 06:24:21 +0000 (17:24 +1100)
Update generic gup implementation with powerpc specific details.
On powerpc at pmd level we can have hugepte, normal pmd pointer
or a pointer to the hugepage directory.

Tested-by: Steve Capper <steve.capper@linaro.org>
Acked-by: Steve Capper <steve.capper@linaro.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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