From: "Aneesh Kumar K.V" <aneesh.ku...@linux.vnet.ibm.com>
Reviewed-by: David Gibson <da...@gibson.dropbear.id.au>
Signed-off-by: Aneesh Kumar K.V <aneesh.ku...@linux.vnet.ibm.com>
---
arch/powerpc/mm/gup.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/mm/gup.c b/arch/powerpc/mm/gup.c
index 4b921af..223a255 100644
--- a/arch/powerpc/mm/gup.c
+++ b/arch/powerpc/mm/gup.c
@@ -66,9 +66,15 @@ static int gup_pmd_range(pud_t pud, unsigned long addr,
unsigned long end,
pmd_t pmd = *pmdp;
next = pmd_addr_end(addr, end);
- if (pmd_none(pmd))
+ /*
+ * If we find a splitting transparent hugepage we
+ * return zero. That will result in taking the slow
+ * path which will call wait_split_huge_page()
+ * if the pmd is still in splitting state
+ */
+ if (pmd_none(pmd) || pmd_trans_splitting(pmd))
return 0;
- if (pmd_huge(pmd)) {
+ if (pmd_huge(pmd) || pmd_large(pmd)) {
if (!gup_hugepte((pte_t *)pmdp, PMD_SIZE, addr, next,
write, pages, nr))
return 0;
--
1.8.1.2
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