block/fs/drivers: remove rw argument from submit_bio

This has callers of submit_bio/submit_bio_wait set the bio->bi_rw
instead of passing it in. This makes that use the same as
generic_make_request and how we set the other bio fields.

Signed-off-by: Mike Christie <mchristi@redhat.com>

Fixed up fs/ext4/crypto.c

Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/fs/mpage.c b/fs/mpage.c
index eedc644..2c251ec 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -59,8 +59,9 @@
 static struct bio *mpage_bio_submit(int rw, struct bio *bio)
 {
 	bio->bi_end_io = mpage_end_io;
+	bio->bi_rw = rw;
 	guard_bio_eod(rw, bio);
-	submit_bio(rw, bio);
+	submit_bio(bio);
 	return NULL;
 }