diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index a6e69378b70619611a54b16a69e0491bca1a84c1..4c3565c282e288031169c7641882232ff664cb81 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -215,9 +215,7 @@ static int join_running_log_trans(struct btrfs_root *root)
  */
 void btrfs_pin_log_trans(struct btrfs_root *root)
 {
-	mutex_lock(&root->log_mutex);
 	atomic_inc(&root->log_writers);
-	mutex_unlock(&root->log_mutex);
 }
 
 /*