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-rw-r--r--mm/swap.c37
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.