bna: fix list corruption

[cascardo/linux.git] / mm / huge_memory.c

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 36c0701..1c317b8 100644 (file)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1700,7 +1700,8 @@ bool move_huge_pmd(struct vm_area_struct *vma, struct vm_area_struct *new_vma,
                pmd = pmdp_huge_get_and_clear(mm, old_addr, old_pmd);
                VM_BUG_ON(!pmd_none(*new_pmd));
 
-               if (pmd_move_must_withdraw(new_ptl, old_ptl)) {
+               if (pmd_move_must_withdraw(new_ptl, old_ptl) &&
+                               vma_is_anonymous(vma)) {
                        pgtable_t pgtable;
                        pgtable = pgtable_trans_huge_withdraw(mm, old_pmd);
                        pgtable_trans_huge_deposit(mm, new_pmd, pgtable);
@@ -2860,6 +2861,7 @@ static void __split_huge_pmd_locked(struct vm_area_struct *vma, pmd_t *pmd,
        young = pmd_young(*pmd);
        dirty = pmd_dirty(*pmd);
 
+       pmdp_huge_split_prepare(vma, haddr, pmd);
        pgtable = pgtable_trans_huge_withdraw(mm, pmd);
        pmd_populate(mm, &_pmd, pgtable);
 
@@ -3482,7 +3484,7 @@ static unsigned long deferred_split_scan(struct shrinker *shrink,
 
        spin_lock_irqsave(&pgdata->split_queue_lock, flags);
        /* Take pin on all head pages to avoid freeing them under us */
-       list_for_each_safe(pos, next, &list) {
+       list_for_each_safe(pos, next, &pgdata->split_queue) {
                page = list_entry((void *)pos, struct page, mapping);
                page = compound_head(page);
                if (get_page_unless_zero(page)) {