mm: make __swap_writepage() use bio_set_op_attrs()

Cleaner than manipulating bio->bi_rw flags directly.

Signed-off-by: Jens Axboe <[e-mail]>

mm/page_io.c

···
 		ret = -ENOMEM;
 		goto out;
 	}
-	bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
 	if (wbc->sync_mode == WB_SYNC_ALL)
-		bio->bi_rw |= REQ_SYNC;
+		bio_set_op_attrs(bio, REQ_OP_WRITE, REQ_SYNC);
+	else
+		bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
 	count_vm_event(PSWPOUT);
 	set_page_writeback(page);
 	unlock_page(page);