2 files changed, 16 insertions, 0 deletions

diff --git a/include/linux/mm.h b/include/linux/mm.h
index d064c73c925e..43b70d5f8201 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1303,6 +1303,13 @@ extern void free_initmem(void);
  */
 extern unsigned long free_reserved_area(unsigned long start, unsigned long end,
                                         int poison, char *s);
+#ifdef  CONFIG_HIGHMEM
+/*
+ * Free a highmem page into the buddy system, adjusting totalhigh_pages
+ * and totalram_pages.
+ */
+extern void free_highmem_page(struct page *page);
+#endif
 
 static inline void adjust_managed_page_count(struct page *page, long count)
 {
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 5c660f5ba3d3..72da11c6804d 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5141,6 +5141,15 @@ unsigned long free_reserved_area(unsigned long start, unsigned long end,
         return pages;
 }
 
+#ifdef  CONFIG_HIGHMEM
+void free_highmem_page(struct page *page)
+{
+        __free_reserved_page(page);
+        totalram_pages++;
+        totalhigh_pages++;
+}
+#endif
+
 /**
  * set_dma_reserve - set the specified number of pages reserved in the first zone
  * @new_dma_reserve: The number of pages to mark reserved