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/jbd2/commit.c b/fs/jbd2/commit.c
index 31f8ca0..8c51436 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -155,9 +155,10 @@ static int journal_submit_commit_record(journal_t *journal,
 
 	if (journal->j_flags & JBD2_BARRIER &&
 	    !jbd2_has_feature_async_commit(journal))
-		ret = submit_bh(REQ_OP_WRITE, WRITE_SYNC | WRITE_FLUSH_FUA, bh);
+		ret = submit_bh(REQ_OP_WRITE,
+			REQ_SYNC | REQ_PREFLUSH | REQ_FUA, bh);
 	else
-		ret = submit_bh(REQ_OP_WRITE, WRITE_SYNC, bh);
+		ret = submit_bh(REQ_OP_WRITE, REQ_SYNC, bh);
 
 	*cbh = bh;
 	return ret;
@@ -402,7 +403,7 @@ void jbd2_journal_commit_transaction(journal_t *journal)
 		jbd2_journal_update_sb_log_tail(journal,
 						journal->j_tail_sequence,
 						journal->j_tail,
-						WRITE_SYNC);
+						REQ_SYNC);
 		mutex_unlock(&journal->j_checkpoint_mutex);
 	} else {
 		jbd_debug(3, "superblock not updated\n");
@@ -717,7 +718,7 @@ void jbd2_journal_commit_transaction(journal_t *journal)
 				clear_buffer_dirty(bh);
 				set_buffer_uptodate(bh);
 				bh->b_end_io = journal_end_buffer_io_sync;
-				submit_bh(REQ_OP_WRITE, WRITE_SYNC, bh);
+				submit_bh(REQ_OP_WRITE, REQ_SYNC, bh);
 			}
 			cond_resched();
 			stats.run.rs_blocks_logged += bufs;