1 files changed, 48 insertions, 0 deletions

diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index 004abf9ebf12..34cda7e0551b 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -702,4 +702,52 @@ int pmd_clear_huge(pmd_t *pmd)
 
         return 0;
 }
+
+/**
+ * pud_free_pmd_page - Clear pud entry and free pmd page.
+ * @pud: Pointer to a PUD.
+ *
+ * Context: The pud range has been unmaped and TLB purged.
+ * Return: 1 if clearing the entry succeeded. 0 otherwise.
+ */
+int pud_free_pmd_page(pud_t *pud)
+{
+        pmd_t *pmd;
+        int i;
+
+        if (pud_none(*pud))
+                return 1;
+
+        pmd = (pmd_t *)pud_page_vaddr(*pud);
+
+        for (i = 0; i < PTRS_PER_PMD; i++)
+                if (!pmd_free_pte_page(&pmd[i]))
+                        return 0;
+
+        pud_clear(pud);
+        free_page((unsigned long)pmd);
+
+        return 1;
+}
+
+/**
+ * pmd_free_pte_page - Clear pmd entry and free pte page.
+ * @pmd: Pointer to a PMD.
+ *
+ * Context: The pmd range has been unmaped and TLB purged.
+ * Return: 1 if clearing the entry succeeded. 0 otherwise.
+ */
+int pmd_free_pte_page(pmd_t *pmd)
+{
+        pte_t *pte;
+
+        if (pmd_none(*pmd))
+                return 1;
+
+        pte = (pte_t *)pmd_page_vaddr(*pmd);
+        pmd_clear(pmd);
+        free_page((unsigned long)pte);
+
+        return 1;
+}
 #endif  /* CONFIG_HAVE_ARCH_HUGE_VMAP */