bcache: Don't export utility code, prefix with bch_

Signed-off-by: Kent Overstreet <koverstreet@google.com>
Cc: linux-bcache@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/drivers/md/bcache/journal.c b/drivers/md/bcache/journal.c
index 21fd101..b0a3d05 100644
--- a/drivers/md/bcache/journal.c
+++ b/drivers/md/bcache/journal.c
@@ -54,7 +54,7 @@
 
 		bio->bi_end_io	= journal_read_endio;
 		bio->bi_private = &op->cl;
-		bio_map(bio, data);
+		bch_bio_map(bio, data);
 
 		closure_bio_submit(bio, &op->cl, ca);
 		closure_sync(&op->cl);
@@ -621,7 +621,7 @@
 
 		bio->bi_end_io	= journal_write_endio;
 		bio->bi_private = w;
-		bio_map(bio, w->data);
+		bch_bio_map(bio, w->data);
 
 		trace_bcache_journal_write(bio);
 		bio_list_add(&list, bio);