All the routines call mb_find_extent are setting argument 'order' to 0
just like:
mb_find_extent(e4b, 0, ex.fe_start, ex.fe_len, &ex);
therefore the useless argument should be removed.
Signed-off-by: Robin Dong <sanbai@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>