1 files changed, 19 insertions, 0 deletions

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index d5094929766d..c8b3ca79de2d 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -219,6 +219,25 @@ static void grow_pgdat_span(struct pglist_data *pgdat,
                                         pgdat->node_start_pfn;
 }
 
+void online_page(struct page *page)
+{
+        totalram_pages++;
+        num_physpages++;
+
+#ifdef CONFIG_HIGHMEM
+        if (PageHighMem(page))
+                totalhigh_pages++;
+#endif
+
+#ifdef CONFIG_FLATMEM
+        max_mapnr = max(page_to_pfn(page), max_mapnr);
+#endif
+
+        ClearPageReserved(page);
+        init_page_count(page);
+        __free_page(page);
+}
+
 static int online_pages_range(unsigned long start_pfn, unsigned long nr_pages,
                         void *arg)
 {