We need to be sure that current data are sent to disk.  Hence we call
ll_rw_block() with SWRITE.
Signed-off-by: NJan Kara <jack@suse.cz>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>