Chris Mason notices do_sync_mapping_range didn't actually ask for data
integrity writeout. Unfortunately, it is advertised as being usable for
data integrity operations.

This is a data interity bug.

Signed-off-by: Nick Piggin <npiggin@suse.de>
---
Index: linux-2.6/fs/sync.c
===================================================================
--- linux-2.6.orig/fs/sync.c
+++ linux-2.6/fs/sync.c
@@ -269,7 +269,7 @@ int do_sync_mapping_range(struct address
 
 	if (flags & SYNC_FILE_RANGE_WRITE) {
 		ret = __filemap_fdatawrite_range(mapping, offset, endbyte,
-						WB_SYNC_NONE);
+						WB_SYNC_ALL);
 		if (ret < 0)
 			goto out;
 	}

--