1 files changed, 13 insertions, 1 deletions

diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index 797100e10010..5527d910ba3d 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -9,6 +9,9 @@
 #include <linux/fs.h>
 #include <linux/flex_proportions.h>
 #include <linux/backing-dev-defs.h>
+#include <linux/blk_types.h>
+
+struct bio;
 
 DECLARE_PER_CPU(int, dirty_throttle_leaks);
 
@@ -100,6 +103,16 @@ struct writeback_control {
 #endif
 };
 
+static inline int wbc_to_write_flags(struct writeback_control *wbc)
+{
+        if (wbc->sync_mode == WB_SYNC_ALL)
+                return REQ_SYNC;
+        else if (wbc->for_kupdate || wbc->for_background)
+                return REQ_BACKGROUND;
+
+        return 0;
+}
+
 /*
  * A wb_domain represents a domain that wb's (bdi_writeback's) belong to
  * and are measured against each other in.  There always is one global
@@ -362,7 +375,6 @@ void global_dirty_limits(unsigned long *pbackground, unsigned long *pdirty);
 unsigned long wb_calc_thresh(struct bdi_writeback *wb, unsigned long thresh);
 
 void wb_update_bandwidth(struct bdi_writeback *wb, unsigned long start_time);
-void page_writeback_init(void);
 void balance_dirty_pages_ratelimited(struct address_space *mapping);
 bool wb_over_bg_thresh(struct bdi_writeback *wb);