mm/hugetlb: add migration entry check in __unmap_hugepage_range

[pandora-kernel.git] / mm / hugetlb.c

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index dcc6780..26922da 100644 (file)
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2418,9 +2418,10 @@ void __unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start,
                        continue;
 
                /*
-                * HWPoisoned hugepage is already unmapped and dropped reference
+                * Migrating hugepage or HWPoisoned hugepage is already
+                * unmapped and its refcount is dropped
                 */
-               if (unlikely(is_hugetlb_entry_hwpoisoned(pte)))
+               if (unlikely(!pte_present(pte)))
                        continue;
 
                page = pte_page(pte);