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/bset.c b/drivers/md/bcache/bset.c
index 4dc9cb4..0b33aac 100644
--- a/drivers/md/bcache/bset.c
+++ b/drivers/md/bcache/bset.c
@@ -1026,7 +1026,7 @@
 
 	if (!start) {
 		spin_lock(&b->c->sort_time_lock);
-		time_stats_update(&b->c->sort_time, start_time);
+		bch_time_stats_update(&b->c->sort_time, start_time);
 		spin_unlock(&b->c->sort_time_lock);
 	}
 }
@@ -1076,7 +1076,7 @@
 	btree_mergesort(b, new->sets->data, &iter, false, true);
 
 	spin_lock(&b->c->sort_time_lock);
-	time_stats_update(&b->c->sort_time, start_time);
+	bch_time_stats_update(&b->c->sort_time, start_time);
 	spin_unlock(&b->c->sort_time_lock);
 
 	bkey_copy_key(&new->key, &b->key);