btrfs: qgroup: account shared subtree during snapshot delete

[cascardo/linux.git] / fs / btrfs / qgroup.c

diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index fd0a196..5279fda 100644 (file)
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -1462,6 +1462,8 @@ struct btrfs_qgroup_extent_record
        struct btrfs_qgroup_extent_record *entry;
        u64 bytenr = record->bytenr;
 
+       assert_spin_locked(&delayed_refs->lock);
+
        while (*p) {
                parent_node = *p;
                entry = rb_entry(parent_node, struct btrfs_qgroup_extent_record,