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/f2fs/segment.c b/fs/f2fs/segment.c
index 2e6f537..3fe2fab 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -406,7 +406,8 @@
 		fcc->dispatch_list = llist_reverse_order(fcc->dispatch_list);
 
 		bio->bi_bdev = sbi->sb->s_bdev;
-		ret = submit_bio_wait(WRITE_FLUSH, bio);
+		bio->bi_rw = WRITE_FLUSH;
+		ret = submit_bio_wait(bio);
 
 		llist_for_each_entry_safe(cmd, next,
 					  fcc->dispatch_list, llnode) {
@@ -438,7 +439,8 @@
 		int ret;
 
 		bio->bi_bdev = sbi->sb->s_bdev;
-		ret = submit_bio_wait(WRITE_FLUSH, bio);
+		bio->bi_rw = WRITE_FLUSH;
+		ret = submit_bio_wait(bio);
 		bio_put(bio);
 		return ret;
 	}