From c367714ce807faff3f0c48064cda158d5117b419 Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Thu, 20 Jun 2013 14:30:20 +0530 Subject: [PATCH] powerpc: Update gup_pmd_range to handle transparent hugepages Reviewed-by: David Gibson Signed-off-by: Aneesh Kumar K.V Signed-off-by: Benjamin Herrenschmidt --- 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; -- 2.7.4