mm: do_sync_mapping_range integrity fix

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 integrity bug.

Signed-off-by: Nick Piggin <[email protected]>
Cc: Chris Mason <[email protected]>
Cc: Dave Chinner <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/fs/sync.c b/fs/sync.c
index 0921d6d4b5e6d27b6fe471128da5b07cf699f137..ac02b56548bcb4245da894568e3a175a2746e9f9 100644 (file)
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -295,7 +295,7 @@ int do_sync_mapping_range(struct address_space *mapping, loff_t offset,
 
        if (flags & SYNC_FILE_RANGE_WRITE) {
                ret = __filemap_fdatawrite_range(mapping, offset, endbyte,
-                                               WB_SYNC_NONE);
+                                               WB_SYNC_ALL);
                if (ret < 0)
                        goto out;
        }