1 files changed, 15 insertions, 0 deletions

diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index c1195065264..716875e5352 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -219,6 +219,12 @@ static inline struct page *page_cache_alloc_cold(struct address_space *x)
         return __page_cache_alloc(mapping_gfp_mask(x)|__GFP_COLD);
 }
 
+static inline struct page *page_cache_alloc_readahead(struct address_space *x)
+{
+        return __page_cache_alloc(mapping_gfp_mask(x) |
+                                  __GFP_COLD | __GFP_NORETRY | __GFP_NOWARN);
+}
+
 typedef int filler_t(void *, struct page *);
 
 extern struct page * find_get_page(struct address_space *mapping,
@@ -357,6 +363,15 @@ static inline int lock_page_or_retry(struct page *page, struct mm_struct *mm,
  */
 extern void wait_on_page_bit(struct page *page, int bit_nr);
 
+extern int wait_on_page_bit_killable(struct page *page, int bit_nr);
+
+static inline int wait_on_page_locked_killable(struct page *page)
+{
+        if (PageLocked(page))
+                return wait_on_page_bit_killable(page, PG_locked);
+        return 0;
+}
+
 /* 
  * Wait for a page to be unlocked.
  *