block,fs: use REQ_* flags directly

Remove the WRITE_* and READ_SYNC wrappers, and just use the flags
directly.  Where applicable this also drops usage of the
bio_set_op_attrs wrapper.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index 373639a5..e562b11 100644
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -38,7 +38,7 @@
 	struct buffer_head *bh, *head;
 	int nr_underway = 0;
 	int write_flags = REQ_META | REQ_PRIO |
-		(wbc->sync_mode == WB_SYNC_ALL ? WRITE_SYNC : 0);
+		(wbc->sync_mode == WB_SYNC_ALL ? REQ_SYNC : 0);
 
 	BUG_ON(!PageLocked(page));
 	BUG_ON(!page_has_buffers(page));
@@ -285,7 +285,7 @@
 		}
 	}
 
-	gfs2_submit_bhs(REQ_OP_READ, READ_SYNC | REQ_META | REQ_PRIO, bhs, num);
+	gfs2_submit_bhs(REQ_OP_READ, REQ_META | REQ_PRIO, bhs, num);
 	if (!(flags & DIO_WAIT))
 		return 0;
 
@@ -453,7 +453,7 @@
 	if (buffer_uptodate(first_bh))
 		goto out;
 	if (!buffer_locked(first_bh))
-		ll_rw_block(REQ_OP_READ, READ_SYNC | REQ_META, 1, &first_bh);
+		ll_rw_block(REQ_OP_READ, REQ_META, 1, &first_bh);
 
 	dblock++;
 	extlen--;