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powerpc/mm/thp: Return pte address if we find trans_splitting.

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For THP that is marked trans splitting, we return the pte.
This require the callers to handle the pmd_trans_splitting scenario,
if they care. All the current callers are either looking at pfn or
write_ok, hence we don't need to update them.

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
2015-03-30 10:41:04 +05:30
committed by Michael Ellerman
parent 691e95fd73
commit 7d6e7f7ffa
4 changed files with 10 additions and 22 deletions
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9
arch/powerpc/mm/hugetlbpage.c
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@@ -1014,12 +1014,11 @@ pte_t *__find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea,
* A hugepage collapse is captured by pmd_none, because
* it mark the pmd none and do a hpte invalidate.
*
* A hugepage split is captured by pmd_trans_splitting
* because we mark the pmd trans splitting and do a
* hpte invalidate
*
* We don't worry about pmd_trans_splitting here, The
* caller if it needs to handle the splitting case
* should check for that.
*/
if (pmd_none(pmd) || pmd_trans_splitting(pmd))
if (pmd_none(pmd))
return NULL;
if (pmd_huge(pmd) || pmd_large(pmd)) {