1 files changed, 21 insertions, 5 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 9a2fa8110afc..a51ef94eec33 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -78,21 +78,37 @@ int min_free_kbytes = 1024;
 unsigned long __initdata nr_kernel_pages;
 unsigned long __initdata nr_all_pages;
 
-/*
- * Temporary debugging check for pages not lying within a given zone.
- */
-static int bad_range(struct zone *zone, struct page *page)
+static int page_outside_zone_boundaries(struct zone *zone, struct page *page)
 {
         if (page_to_pfn(page) >= zone->zone_start_pfn + zone->spanned_pages)
                 return 1;
         if (page_to_pfn(page) < zone->zone_start_pfn)
                 return 1;
+
+        return 0;
+}
+
+static int page_is_consistent(struct zone *zone, struct page *page)
+{
 #ifdef CONFIG_HOLES_IN_ZONE
         if (!pfn_valid(page_to_pfn(page)))
-                return 1;
+                return 0;
 #endif
         if (zone != page_zone(page))
+                return 0;
+
+        return 1;
+}
+/*
+ * Temporary debugging check for pages not lying within a given zone.
+ */
+static int bad_range(struct zone *zone, struct page *page)
+{
+        if (page_outside_zone_boundaries(zone, page))
                 return 1;
+        if (!page_is_consistent(zone, page))
+                return 1;
+
         return 0;
 }