1 files changed, 9 insertions, 0 deletions

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 7dcd2a250495..3efa7253523e 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -409,6 +409,9 @@ static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
         } else {
                 spin_unlock(&walk->mm->page_table_lock);
         }
+
+        if (pmd_trans_unstable(pmd))
+                return 0;
         /*
          * The mmap_sem held all the way back in m_start() is what
          * keeps khugepaged out of here and from collapsing things
@@ -507,6 +510,8 @@ static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
         struct page *page;
 
         split_huge_page_pmd(walk->mm, pmd);
+        if (pmd_trans_unstable(pmd))
+                return 0;
 
         pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
         for (; addr != end; pte++, addr += PAGE_SIZE) {
@@ -670,6 +675,8 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
         int err = 0;
 
         split_huge_page_pmd(walk->mm, pmd);
+        if (pmd_trans_unstable(pmd))
+                return 0;
 
         /* find the first VMA at or above 'addr' */
         vma = find_vma(walk->mm, addr);
@@ -961,6 +968,8 @@ static int gather_pte_stats(pmd_t *pmd, unsigned long addr,
                 spin_unlock(&walk->mm->page_table_lock);
         }
 
+        if (pmd_trans_unstable(pmd))
+                return 0;
         orig_pte = pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl);
         do {
                 struct page *page = can_gather_numa_stats(*pte, md->vma, addr);