>From da8432aafd231e7cdcda9d15484829def4663cb0 Mon Sep 17 00:00:00 2001
From: Zhigang Lu <zlu@xxxxxxxxxx>
Date: Mon, 21 Jan 2013 11:23:26 +0800
Subject: [PATCH 1/1] mm/hugetlb: Set PTE as huge in hugetlb_change_protection
When setting a huge PTE, besides calling pte_mkhuge(), we also need
to call arch_make_huge_pte(), which we indeed do in make_huge_pte(),
but we forget to do in hugetlb_change_protection().
Signed-off-by: Zhigang Lu <zlu@xxxxxxxxxx>
Signed-off-by: Chris Metcalf <cmetcalf@xxxxxxxxxx>
---
mm/hugetlb.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 4f3ea0b..546db81 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -3033,6 +3033,7 @@ unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
if (!huge_pte_none(huge_ptep_get(ptep))) {
pte = huge_ptep_get_and_clear(mm, address, ptep);
pte = pte_mkhuge(pte_modify(pte, newprot));
+ pte = arch_make_huge_pte(pte, vma, NULL, 0);
set_huge_pte_at(mm, address, ptep, pte);
pages++;
}
--
1.7.10.3
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