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/f2fs/node.c b/fs/f2fs/node.c
index 01177ec..932f3f8b 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1134,7 +1134,7 @@ static struct page *__get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid,
 	if (!page)
 		return ERR_PTR(-ENOMEM);
 
-	err = read_node_page(page, READ_SYNC);
+	err = read_node_page(page, 0);
 	if (err < 0) {
 		f2fs_put_page(page, 1);
 		return ERR_PTR(err);
@@ -1570,7 +1570,7 @@ static int f2fs_write_node_page(struct page *page,
 		.sbi = sbi,
 		.type = NODE,
 		.op = REQ_OP_WRITE,
-		.op_flags = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : 0,
+		.op_flags = (wbc->sync_mode == WB_SYNC_ALL) ? REQ_SYNC : 0,
 		.page = page,
 		.encrypted_page = NULL,
 	};