1 files changed, 50 insertions, 0 deletions

diff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c
index 74c0ddaa6fa0..e642627da6b7 100644
--- a/mm/pgtable-generic.c
+++ b/mm/pgtable-generic.c
@@ -120,3 +120,53 @@ void pmdp_splitting_flush(struct vm_area_struct *vma, unsigned long address,
 }
 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
 #endif
+
+#ifndef __HAVE_ARCH_PGTABLE_DEPOSIT
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+void pgtable_trans_huge_deposit(struct mm_struct *mm, pgtable_t pgtable)
+{
+        assert_spin_locked(&mm->page_table_lock);
+
+        /* FIFO */
+        if (!mm->pmd_huge_pte)
+                INIT_LIST_HEAD(&pgtable->lru);
+        else
+                list_add(&pgtable->lru, &mm->pmd_huge_pte->lru);
+        mm->pmd_huge_pte = pgtable;
+}
+#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
+#endif
+
+#ifndef __HAVE_ARCH_PGTABLE_WITHDRAW
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+/* no "address" argument so destroys page coloring of some arch */
+pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm)
+{
+        pgtable_t pgtable;
+
+        assert_spin_locked(&mm->page_table_lock);
+
+        /* FIFO */
+        pgtable = mm->pmd_huge_pte;
+        if (list_empty(&pgtable->lru))
+                mm->pmd_huge_pte = NULL;
+        else {
+                mm->pmd_huge_pte = list_entry(pgtable->lru.next,
+                                              struct page, lru);
+                list_del(&pgtable->lru);
+        }
+        return pgtable;
+}
+#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
+#endif
+
+#ifndef __HAVE_ARCH_PMDP_INVALIDATE
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+void pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
+                     pmd_t *pmdp)
+{
+        set_pmd_at(vma->vm_mm, address, pmdp, pmd_mknotpresent(*pmdp));
+        flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
+}
+#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
+#endif