1 files changed, 20 insertions, 16 deletions

diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index 3fce545df394..bfe1f4780644 100644
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h
@@ -37,14 +37,14 @@ struct anon_vma {
         atomic_t refcount;
 
         /*
-         * NOTE: the LSB of the head.next is set by
+         * NOTE: the LSB of the rb_root.rb_node is set by
          * mm_take_all_locks() _after_ taking the above lock. So the
-         * head must only be read/written after taking the above lock
+         * rb_root must only be read/written after taking the above lock
          * to be sure to see a valid next pointer. The LSB bit itself
          * is serialized by a system wide lock only visible to
          * mm_take_all_locks() (mm_all_locks_mutex).
          */
-        struct list_head head;  /* Chain of private "related" vmas */
+        struct rb_root rb_root; /* Interval tree of private "related" vmas */
 };
 
 /*
@@ -57,14 +57,29 @@ struct anon_vma {
  * with a VMA, or the VMAs associated with an anon_vma.
  * The "same_vma" list contains the anon_vma_chains linking
  * all the anon_vmas associated with this VMA.
- * The "same_anon_vma" list contains the anon_vma_chains
+ * The "rb" field indexes on an interval tree the anon_vma_chains
  * which link all the VMAs associated with this anon_vma.
  */
 struct anon_vma_chain {
         struct vm_area_struct *vma;
         struct anon_vma *anon_vma;
         struct list_head same_vma;   /* locked by mmap_sem & page_table_lock */
-        struct list_head same_anon_vma; /* locked by anon_vma->mutex */
+        struct rb_node rb;                      /* locked by anon_vma->mutex */
+        unsigned long rb_subtree_last;
+#ifdef CONFIG_DEBUG_VM_RB
+        unsigned long cached_vma_start, cached_vma_last;
+#endif
+};
+
+enum ttu_flags {
+        TTU_UNMAP = 0,                  /* unmap mode */
+        TTU_MIGRATION = 1,              /* migration mode */
+        TTU_MUNLOCK = 2,                /* munlock mode */
+        TTU_ACTION_MASK = 0xff,
+
+        TTU_IGNORE_MLOCK = (1 << 8),    /* ignore mlock */
+        TTU_IGNORE_ACCESS = (1 << 9),   /* don't age */
+        TTU_IGNORE_HWPOISON = (1 << 10),/* corrupted page is recoverable */
 };
 
 #ifdef CONFIG_MMU
@@ -120,7 +135,6 @@ void anon_vma_init(void);	/* create anon_vma_cachep */
 int  anon_vma_prepare(struct vm_area_struct *);
 void unlink_anon_vmas(struct vm_area_struct *);
 int anon_vma_clone(struct vm_area_struct *, struct vm_area_struct *);
-void anon_vma_moveto_tail(struct vm_area_struct *);
 int anon_vma_fork(struct vm_area_struct *, struct vm_area_struct *);
 
 static inline void anon_vma_merge(struct vm_area_struct *vma,
@@ -161,16 +175,6 @@ int page_referenced(struct page *, int is_locked,
 int page_referenced_one(struct page *, struct vm_area_struct *,
         unsigned long address, unsigned int *mapcount, unsigned long *vm_flags);
 
-enum ttu_flags {
-        TTU_UNMAP = 0,                  /* unmap mode */
-        TTU_MIGRATION = 1,              /* migration mode */
-        TTU_MUNLOCK = 2,                /* munlock mode */
-        TTU_ACTION_MASK = 0xff,
-
-        TTU_IGNORE_MLOCK = (1 << 8),    /* ignore mlock */
-        TTU_IGNORE_ACCESS = (1 << 9),   /* don't age */
-        TTU_IGNORE_HWPOISON = (1 << 10),/* corrupted page is recoverable */
-};
 #define TTU_ACTION(x) ((x) & TTU_ACTION_MASK)
 
 int try_to_unmap(struct page *, enum ttu_flags flags);