2 files changed, 26 insertions, 1 deletions

diff --git a/include/linux/mm.h b/include/linux/mm.h
index c6bf813a6b3d..644990b83cda 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1438,8 +1438,32 @@ static inline int __pmd_alloc(struct mm_struct *mm, pud_t *pud,
 {
         return 0;
 }
+
+static inline unsigned long mm_nr_pmds(struct mm_struct *mm)
+{
+        return 0;
+}
+
+static inline void mm_inc_nr_pmds(struct mm_struct *mm) {}
+static inline void mm_dec_nr_pmds(struct mm_struct *mm) {}
+
 #else
 int __pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address);
+
+static inline unsigned long mm_nr_pmds(struct mm_struct *mm)
+{
+        return atomic_long_read(&mm->nr_pmds);
+}
+
+static inline void mm_inc_nr_pmds(struct mm_struct *mm)
+{
+        atomic_long_inc(&mm->nr_pmds);
+}
+
+static inline void mm_dec_nr_pmds(struct mm_struct *mm)
+{
+        atomic_long_dec(&mm->nr_pmds);
+}
 #endif
 
 int __pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 20ff2105b564..199a03aab8dc 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -363,7 +363,8 @@ struct mm_struct {
         pgd_t * pgd;
         atomic_t mm_users;                      /* How many users with user space? */
         atomic_t mm_count;                      /* How many references to "struct mm_struct" (users count as 1) */
-        atomic_long_t nr_ptes;                  /* Page table pages */
+        atomic_long_t nr_ptes;                  /* PTE page table pages */
+        atomic_long_t nr_pmds;                  /* PMD page table pages */
         int map_count;                          /* number of VMAs */
 
         spinlock_t page_table_lock;             /* Protects page tables and some counters */