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powerpc/mm/hugetlb: Use pte_access_permitted for hugetlb access check 

No functional change in this patch. This update gup_hugepte to use the
helper. This will help later when we add memory keys.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Aneesh Kumar K.V 2017-12-04 07:49:10 +05:30 committed by Michael Ellerman
parent 7e4363550c
commit 5fa5b16be5
1 changed files with 1 additions and 3 deletions
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4
arch/powerpc/mm/hugetlbpage.c
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@ -855,9 +855,7 @@ int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr,
pte = READ_ONCE(*ptep);
if (!pte_present(pte) || !pte_read(pte))
return 0;
if (write && !pte_write(pte))
if (!pte_access_permitted(pte, write))
return 0;
/* hugepages are never "special" */