Le 04/12/2017 à 03:19, Aneesh Kumar K.V a écrit :
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.ku...@linux.vnet.ibm.com>
---
arch/powerpc/mm/hugetlbpage.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c
index a9b9083c5e49..c7e5afe5e118 100644
--- a/arch/powerpc/mm/hugetlbpage.c
+++ b/arch/powerpc/mm/hugetlbpage.c
@@ -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))
Seems like pte_access_permitted() doesn't check _PAGE_RO whereas
pte_write() does.
Christophe
return 0;
/* hugepages are never "special" */
