1 files changed, 0 insertions, 2 deletions

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 1df67129cc3d..48b455fdaac5 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -670,7 +670,6 @@ static noinline int drop_dirty_roots(struct btrfs_root *tree_root,
                 atomic_dec(&root->fs_info->throttles);
                 wake_up(&root->fs_info->transaction_throttle);
 
-                mutex_lock(&root->fs_info->alloc_mutex);
                 num_bytes -= btrfs_root_used(&dirty->root->root_item);
                 bytes_used = btrfs_root_used(&root->root_item);
                 if (num_bytes) {
@@ -678,7 +677,6 @@ static noinline int drop_dirty_roots(struct btrfs_root *tree_root,
                         btrfs_set_root_used(&root->root_item,
                                             bytes_used - num_bytes);
                 }
-                mutex_unlock(&root->fs_info->alloc_mutex);
 
                 ret = btrfs_del_root(trans, tree_root, &dirty->root->root_key);
                 if (ret) {