NTFS: Disable the file size changing code from

      fs/ntfs/aops.c::ntfs_prepare_write() for now as it is not safe.
Signed-off-by: Anton Altaparmakov <aia21@cantab.net>

fs/ntfs/ChangeLog

@@ -49,11 +49,6 @@ ToDo/Notes:
 	- In fs/ntfs/aops.c::ntfs_writepage(), if the page is fully outside
 	  i_size, i.e. race with truncate, invalidate the buffers on the page
 	  so that they become freeable and hence the page does not leak.
-	- Implement extension of resident files in the regular file write code
-	  paths (fs/ntfs/aops.c::ntfs_{prepare,commit}_write()).  At present
-	  this only works until the data attribute becomes too big for the mft
-	  record after which we abort the write returning -EOPNOTSUPP from
-	  ntfs_prepare_write().
 	- Remove unused function fs/ntfs/runlist.c::ntfs_rl_merge().  (Adrian
 	  Bunk)
 	- Fix stupid bug in fs/ntfs/attrib.c::ntfs_attr_find() that resulted in

fs/ntfs/aops.c

@@ -1884,6 +1884,12 @@ static int ntfs_prepare_write(struct file *file, struct page *page,
 	/* If we do not need to resize the attribute allocation we are done. */
 	if (new_size <= vi->i_size)
 		goto done;
+
+	// FIXME: We abort for now as this code is not safe.
+	ntfs_error(vi->i_sb, "Changing the file size is not supported yet.  "
+			"Sorry.");
+	return -EOPNOTSUPP;
+
 	/* Map, pin, and lock the (base) mft record. */
 	if (!NInoAttr(ni))
 		base_ni = ni;