mm/hugetlb: separate path for hwpoison entry in copy_hugetlb_page_range()

[linux-2.6-microblaze.git] / mm / hugetlb.c

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index a57e1be..baf7f6b 100644 (file)
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -4788,8 +4788,13 @@ again:
                         * sharing with another vma.
                         */
                        ;
-               } else if (unlikely(is_hugetlb_entry_migration(entry) ||
-                                   is_hugetlb_entry_hwpoisoned(entry))) {
+               } else if (unlikely(is_hugetlb_entry_hwpoisoned(entry))) {
+                       bool uffd_wp = huge_pte_uffd_wp(entry);
+
+                       if (!userfaultfd_wp(dst_vma) && uffd_wp)
+                               entry = huge_pte_clear_uffd_wp(entry);
+                       set_huge_pte_at(dst, addr, dst_pte, entry);
+               } else if (unlikely(is_hugetlb_entry_migration(entry))) {
                        swp_entry_t swp_entry = pte_to_swp_entry(entry);
                        bool uffd_wp = huge_pte_uffd_wp(entry);