btrfs: remove unused qgroup members from btrfs_trans_handle

The members have been effectively unused since "Btrfs: rework qgroup
accounting" (fcebe456), there's no substitute for
assert_qgroups_uptodate so it's removed as well.
Reviewed-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/extent-tree.c

@@ -3003,7 +3003,6 @@ int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
 		goto again;
 	}
 out:
-	assert_qgroups_uptodate(trans);
 	trans->can_flush_pending_bgs = can_flush_pending_bgs;
 	return 0;
 }

fs/btrfs/qgroup.c

@@ -2487,18 +2487,6 @@ void btrfs_qgroup_free_refroot(struct btrfs_fs_info *fs_info,
 	spin_unlock(&fs_info->qgroup_lock);
 }
 
-void assert_qgroups_uptodate(struct btrfs_trans_handle *trans)
-{
-	if (list_empty(&trans->qgroup_ref_list) && !trans->delayed_ref_elem.seq)
-		return;
-	btrfs_err(trans->fs_info,
-		"qgroups not uptodate in trans handle %p:  list is%s empty, seq is %#x.%x",
-		trans, list_empty(&trans->qgroup_ref_list) ? "" : " not",
-		(u32)(trans->delayed_ref_elem.seq >> 32),
-		(u32)trans->delayed_ref_elem.seq);
-	BUG();
-}
-
 /*
  * returns < 0 on error, 0 when more leafs are to be scanned.
  * returns 1 when done.

fs/btrfs/qgroup.h

@@ -196,7 +196,6 @@ static inline void btrfs_qgroup_free_delayed_ref(struct btrfs_fs_info *fs_info,
 	btrfs_qgroup_free_refroot(fs_info, ref_root, num_bytes);
 	trace_btrfs_qgroup_free_delayed_ref(fs_info, ref_root, num_bytes);
 }
-void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);
 
 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
 int btrfs_verify_qgroup_counts(struct btrfs_fs_info *fs_info, u64 qgroupid,

fs/btrfs/tests/btrfs-tests.c

@@ -237,7 +237,6 @@ void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans)
 {
 	memset(trans, 0, sizeof(*trans));
 	trans->transid = 1;
-	INIT_LIST_HEAD(&trans->qgroup_ref_list);
 	trans->type = __TRANS_DUMMY;
 }
 

fs/btrfs/transaction.c

@@ -572,7 +572,6 @@ start_transaction(struct btrfs_root *root, unsigned int num_items,
 
 	h->type = type;
 	h->can_flush_pending_bgs = true;
-	INIT_LIST_HEAD(&h->qgroup_ref_list);
 	INIT_LIST_HEAD(&h->new_bgs);
 
 	smp_mb();
@@ -917,7 +916,6 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
 		wake_up_process(info->transaction_kthread);
 		err = -EIO;
 	}
-	assert_qgroups_uptodate(trans);
 
 	kmem_cache_free(btrfs_trans_handle_cachep, trans);
 	if (must_run_delayed_refs) {
@@ -2223,7 +2221,6 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans)
 
 	switch_commit_roots(cur_trans, fs_info);
 
-	assert_qgroups_uptodate(trans);
 	ASSERT(list_empty(&cur_trans->dirty_bgs));
 	ASSERT(list_empty(&cur_trans->io_bgs));
 	update_super_roots(fs_info);

fs/btrfs/transaction.h

@@ -127,8 +127,6 @@ struct btrfs_trans_handle {
 	unsigned int type;
 	struct btrfs_root *root;
 	struct btrfs_fs_info *fs_info;
-	struct seq_list delayed_ref_elem;
-	struct list_head qgroup_ref_list;
 	struct list_head new_bgs;
 };