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-rw-r--r--mm/hugetlb.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 54d42b009dbe..b61d2db9f34e 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2349,11 +2349,17 @@ retry_avoidcopy:
ptep = huge_pte_offset(mm, address & huge_page_mask(h));
if (likely(pte_same(huge_ptep_get(ptep), pte))) {
/* Break COW */
+ mmu_notifier_invalidate_range_start(mm,
+ address & huge_page_mask(h),
+ (address & huge_page_mask(h)) + huge_page_size(h));
huge_ptep_clear_flush(vma, address, ptep);
set_huge_pte_at(mm, address, ptep,
make_huge_pte(vma, new_page, 1));
/* Make the old page be freed below */
new_page = old_page;
+ mmu_notifier_invalidate_range_end(mm,
+ address & huge_page_mask(h),
+ (address & huge_page_mask(h)) + huge_page_size(h));
}
page_cache_release(new_page);
page_cache_release(old_page);