2 files changed, 6 insertions, 1 deletions

diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 731cd2ac3227..709d92fd2877 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -83,6 +83,7 @@
 #define PG_private              11      /* If pagecache, has fs-private data */
 
 #define PG_writeback            12      /* Page is under writeback */
+#define PG_readahead            13      /* Reminder to do async read-ahead */
 #define PG_compound             14      /* Part of a compound page */
 #define PG_swapcache            15      /* Swap page: swp_entry_t in private */
 
@@ -226,6 +227,10 @@ static inline void SetPageUptodate(struct page *page)
 #define SetPageMappedToDisk(page) set_bit(PG_mappedtodisk, &(page)->flags)
 #define ClearPageMappedToDisk(page) clear_bit(PG_mappedtodisk, &(page)->flags)
 
+#define PageReadahead(page)     test_bit(PG_readahead, &(page)->flags)
+#define SetPageReadahead(page)  set_bit(PG_readahead, &(page)->flags)
+#define ClearPageReadahead(page) clear_bit(PG_readahead, &(page)->flags)
+
 #define PageReclaim(page)       test_bit(PG_reclaim, &(page)->flags)
 #define SetPageReclaim(page)    set_bit(PG_reclaim, &(page)->flags)
 #define ClearPageReclaim(page)  clear_bit(PG_reclaim, &(page)->flags)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index e2a10b957f23..2165be9462c0 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -617,7 +617,7 @@ static int prep_new_page(struct page *page, int order, gfp_t gfp_flags)
         if (PageReserved(page))
                 return 1;
 
-        page->flags &= ~(1 << PG_uptodate | 1 << PG_error |
+        page->flags &= ~(1 << PG_uptodate | 1 << PG_error | 1 << PG_readahead |
                         1 << PG_referenced | 1 << PG_arch_1 |
                         1 << PG_owner_priv_1 | 1 << PG_mappedtodisk);
         set_page_private(page, 0);