1 files changed, 34 insertions, 32 deletions

diff --git a/mm/swap.c b/mm/swap.c
index b524ea90bddb..88895c249bc9 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -209,19 +209,18 @@ int lru_add_drain_all(void)
  */
 void fastcall __page_cache_release(struct page *page)
 {
-        unsigned long flags;
-        struct zone *zone = page_zone(page);
+        if (PageLRU(page)) {
+                unsigned long flags;
+                struct zone *zone = page_zone(page);
 
-        spin_lock_irqsave(&zone->lru_lock, flags);
-        if (TestClearPageLRU(page))
+                spin_lock_irqsave(&zone->lru_lock, flags);
+                BUG_ON(!PageLRU(page));
+                __ClearPageLRU(page);
                 del_page_from_lru(zone, page);
-        if (page_count(page) != 0)
-                page = NULL;
-        spin_unlock_irqrestore(&zone->lru_lock, flags);
-        if (page)
-                free_hot_page(page);
+                spin_unlock_irqrestore(&zone->lru_lock, flags);
+        }
+        free_hot_page(page);
 }
-
 EXPORT_SYMBOL(__page_cache_release);
 
 /*
@@ -245,7 +244,6 @@ void release_pages(struct page **pages, int nr, int cold)
         pagevec_init(&pages_to_free, cold);
         for (i = 0; i < nr; i++) {
                 struct page *page = pages[i];
-                struct zone *pagezone;
 
                 if (unlikely(PageCompound(page))) {
                         if (zone) {
@@ -259,23 +257,27 @@ void release_pages(struct page **pages, int nr, int cold)
                 if (!put_page_testzero(page))
                         continue;
 
-                pagezone = page_zone(page);
-                if (pagezone != zone) {
-                        if (zone)
-                                spin_unlock_irq(&zone->lru_lock);
-                        zone = pagezone;
-                        spin_lock_irq(&zone->lru_lock);
-                }
-                if (TestClearPageLRU(page))
+                if (PageLRU(page)) {
+                        struct zone *pagezone = page_zone(page);
+                        if (pagezone != zone) {
+                                if (zone)
+                                        spin_unlock_irq(&zone->lru_lock);
+                                zone = pagezone;
+                                spin_lock_irq(&zone->lru_lock);
+                        }
+                        BUG_ON(!PageLRU(page));
+                        __ClearPageLRU(page);
                         del_page_from_lru(zone, page);
-                if (page_count(page) == 0) {
-                        if (!pagevec_add(&pages_to_free, page)) {
+                }
+
+                if (!pagevec_add(&pages_to_free, page)) {
+                        if (zone) {
                                 spin_unlock_irq(&zone->lru_lock);
-                                __pagevec_free(&pages_to_free);
-                                pagevec_reinit(&pages_to_free);
-                                zone = NULL;    /* No lock is held */
+                                zone = NULL;
                         }
-                }
+                        __pagevec_free(&pages_to_free);
+                        pagevec_reinit(&pages_to_free);
+                }
         }
         if (zone)
                 spin_unlock_irq(&zone->lru_lock);
@@ -343,8 +345,8 @@ void __pagevec_lru_add(struct pagevec *pvec)
                         zone = pagezone;
                         spin_lock_irq(&zone->lru_lock);
                 }
-                if (TestSetPageLRU(page))
-                        BUG();
+                BUG_ON(PageLRU(page));
+                SetPageLRU(page);
                 add_page_to_inactive_list(zone, page);
         }
         if (zone)
@@ -370,10 +372,10 @@ void __pagevec_lru_add_active(struct pagevec *pvec)
                         zone = pagezone;
                         spin_lock_irq(&zone->lru_lock);
                 }
-                if (TestSetPageLRU(page))
-                        BUG();
-                if (TestSetPageActive(page))
-                        BUG();
+                BUG_ON(PageLRU(page));
+                SetPageLRU(page);
+                BUG_ON(PageActive(page));
+                SetPageActive(page);
                 add_page_to_active_list(zone, page);
         }
         if (zone)
@@ -510,7 +512,7 @@ long percpu_counter_sum(struct percpu_counter *fbc)
 
         spin_lock(&fbc->lock);
         ret = fbc->count;
-        for_each_cpu(cpu) {
+        for_each_possible_cpu(cpu) {
                 long *pcount = per_cpu_ptr(fbc->counters, cpu);
                 ret += *pcount;
         }