f2fs: add detailed information of bio types in the tracepoints

This patch inserts information of bio types in more detail.
So, we can now see REQ_META and REQ_PRIO too.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 6dd1dc1..33ab378 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -846,11 +846,11 @@
 	if (type >= META_FLUSH)
 		rw = WRITE_FLUSH_FUA;
 
-	trace_f2fs_submit_write_bio(sbi->sb, rw, btype, io->bio);
-
 	if (btype == META)
 		rw |= REQ_META;
 
+	trace_f2fs_submit_write_bio(sbi->sb, rw, btype, io->bio);
+
 	p = io->bio->bi_private;
 	p->sbi = sbi;
 	io->bio->bi_end_io = f2fs_end_io_write;