1 files changed, 10 insertions, 0 deletions

diff --git a/mm/util.c b/mm/util.c
index c1250501364f..029fc2f3b395 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -515,6 +515,16 @@ struct address_space *page_mapping(struct page *page)
 }
 EXPORT_SYMBOL(page_mapping);
 
+/*
+ * For file cache pages, return the address_space, otherwise return NULL
+ */
+struct address_space *page_mapping_file(struct page *page)
+{
+        if (unlikely(PageSwapCache(page)))
+                return NULL;
+        return page_mapping(page);
+}
+
 /* Slow path of page_mapcount() for compound pages */
 int __page_mapcount(struct page *page)
 {