diff --git a/fs/btrfs/inode-map.c b/fs/btrfs/inode-map.c
index 2e8bb402050b..84b2c9ee52a7 100644
--- a/fs/btrfs/inode-map.c
+++ b/fs/btrfs/inode-map.c
@@ -146,6 +146,7 @@ static void start_caching(struct btrfs_root *root)
 		spin_lock(&root->ino_cache_lock);
 		root->ino_cache_state = BTRFS_CACHE_FINISHED;
 		spin_unlock(&root->ino_cache_lock);
+		wake_up(&root->ino_cache_wait);
 		return;
 	}