The commit fcebe4562dec ("Btrfs: rework qgroup accounting") reworked
qgroups and added some new structures. Another rework of qgroup
mechanics e69bcee37692 ("btrfs: qgroup: Cleanup the old
ref_node-oriented mechanism.") stopped using them and left uncleaned.

Signed-off-by: David Sterba <dste...@suse.com>
---
 fs/btrfs/ctree.h   | 3 ---
 fs/btrfs/disk-io.c | 3 ---
 2 files changed, 6 deletions(-)

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 1d1e12400552..5d85c55032dd 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1092,10 +1092,7 @@ struct btrfs_fs_info {
 
        /* holds configuration and tracking. Protected by qgroup_lock */
        struct rb_root qgroup_tree;
-       struct rb_root qgroup_op_tree;
        spinlock_t qgroup_lock;
-       spinlock_t qgroup_op_lock;
-       atomic_t qgroup_op_seq;
 
        /*
         * used to avoid frequently calling ulist_alloc()/ulist_free()
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 8740152cce1f..c3b89584dad6 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2174,7 +2174,6 @@ static void btrfs_init_qgroup(struct btrfs_fs_info 
*fs_info)
        spin_lock_init(&fs_info->qgroup_lock);
        mutex_init(&fs_info->qgroup_ioctl_lock);
        fs_info->qgroup_tree = RB_ROOT;
-       fs_info->qgroup_op_tree = RB_ROOT;
        INIT_LIST_HEAD(&fs_info->dirty_qgroups);
        fs_info->qgroup_seq = 1;
        fs_info->qgroup_ulist = NULL;
@@ -2679,7 +2678,6 @@ int open_ctree(struct super_block *sb,
        spin_lock_init(&fs_info->defrag_inodes_lock);
        spin_lock_init(&fs_info->tree_mod_seq_lock);
        spin_lock_init(&fs_info->super_lock);
-       spin_lock_init(&fs_info->qgroup_op_lock);
        spin_lock_init(&fs_info->buffer_lock);
        spin_lock_init(&fs_info->unused_bgs_lock);
        rwlock_init(&fs_info->tree_mod_log_lock);
@@ -2706,7 +2704,6 @@ int open_ctree(struct super_block *sb,
 
        atomic_set(&fs_info->async_delalloc_pages, 0);
        atomic_set(&fs_info->defrag_running, 0);
-       atomic_set(&fs_info->qgroup_op_seq, 0);
        atomic_set(&fs_info->reada_works_cnt, 0);
        atomic_set(&fs_info->nr_delayed_iputs, 0);
        atomic64_set(&fs_info->tree_mod_seq, 0);
-- 
2.21.0

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