2 files changed, 5 insertions, 1 deletions

diff --git a/mm/filemap.c b/mm/filemap.c
index 1e6a7d34874f..65d9d9e2b755 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -236,11 +236,12 @@ int filemap_fdatawrite(struct address_space *mapping)
 }
 EXPORT_SYMBOL(filemap_fdatawrite);
 
-static int filemap_fdatawrite_range(struct address_space *mapping, loff_t start,
+int filemap_fdatawrite_range(struct address_space *mapping, loff_t start,
                                 loff_t end)
 {
         return __filemap_fdatawrite_range(mapping, start, end, WB_SYNC_ALL);
 }
+EXPORT_SYMBOL(filemap_fdatawrite_range);
 
 /**
  * filemap_flush - mostly a non-blocking flush
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index b38f700825fc..94c6d8988ab3 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -960,6 +960,9 @@ retry:
         }
         if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
                 mapping->writeback_index = index;
+
+        if (wbc->range_cont)
+                wbc->range_start = index << PAGE_CACHE_SHIFT;
         return ret;
 }
 EXPORT_SYMBOL(write_cache_pages);