bcache: Move spinlock into struct time_stats

Minor cleanup.

Signed-off-by: Kent Overstreet <kmo@daterainc.com>
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 041dd9d..4813ef6 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -1435,9 +1435,13 @@
 	init_waitqueue_head(&c->try_wait);
 	init_waitqueue_head(&c->bucket_wait);
 	closure_init_unlocked(&c->uuid_write);
-	spin_lock_init(&c->sort_time_lock);
 	mutex_init(&c->sort_lock);
-	spin_lock_init(&c->btree_read_time_lock);
+
+	spin_lock_init(&c->sort_time.lock);
+	spin_lock_init(&c->btree_gc_time.lock);
+	spin_lock_init(&c->btree_split_time.lock);
+	spin_lock_init(&c->btree_read_time.lock);
+	spin_lock_init(&c->try_harder_time.lock);
 
 	bch_moving_init_cache_set(c);