1 files changed, 37 insertions, 0 deletions

diff --git a/mm/swap.c b/mm/swap.c
index e0eeef940886..c02f93611a84 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -479,6 +479,43 @@ void __pagevec_release(struct pagevec *pvec)
 
 EXPORT_SYMBOL(__pagevec_release);
 
+/* used by __split_huge_page_refcount() */
+void lru_add_page_tail(struct zone* zone,
+                       struct page *page, struct page *page_tail)
+{
+        int active;
+        enum lru_list lru;
+        const int file = 0;
+        struct list_head *head;
+
+        VM_BUG_ON(!PageHead(page));
+        VM_BUG_ON(PageCompound(page_tail));
+        VM_BUG_ON(PageLRU(page_tail));
+        VM_BUG_ON(!spin_is_locked(&zone->lru_lock));
+
+        SetPageLRU(page_tail);
+
+        if (page_evictable(page_tail, NULL)) {
+                if (PageActive(page)) {
+                        SetPageActive(page_tail);
+                        active = 1;
+                        lru = LRU_ACTIVE_ANON;
+                } else {
+                        active = 0;
+                        lru = LRU_INACTIVE_ANON;
+                }
+                update_page_reclaim_stat(zone, page_tail, file, active);
+                if (likely(PageLRU(page)))
+                        head = page->lru.prev;
+                else
+                        head = &zone->lru[lru].list;
+                __add_page_to_lru_list(zone, page_tail, lru, head);
+        } else {
+                SetPageUnevictable(page_tail);
+                add_page_to_lru_list(zone, page_tail, LRU_UNEVICTABLE);
+        }
+}
+
 /*
  * Add the passed pages to the LRU, then drop the caller's refcount
  * on them.  Reinitialises the caller's pagevec.