716 static void init_delayed_ref_head(struct btrfs_delayed_ref_head *head_ref,  in init_delayed_ref_head()  argument
752 	refcount_set(&head_ref->refs, 1);  in init_delayed_ref_head()
753 	head_ref->bytenr = bytenr;  in init_delayed_ref_head()
754 	head_ref->num_bytes = num_bytes;  in init_delayed_ref_head()
755 	head_ref->ref_mod = count_mod;  in init_delayed_ref_head()
756 	head_ref->must_insert_reserved = must_insert_reserved;  in init_delayed_ref_head()
757 	head_ref->is_data = is_data;  in init_delayed_ref_head()
758 	head_ref->is_system = is_system;  in init_delayed_ref_head()
759 	head_ref->ref_tree = RB_ROOT_CACHED;  in init_delayed_ref_head()
760 	INIT_LIST_HEAD(&head_ref->ref_add_list);  in init_delayed_ref_head()
761 	RB_CLEAR_NODE(&head_ref->href_node);  in init_delayed_ref_head()
762 	head_ref->processing = 0;  in init_delayed_ref_head()
763 	head_ref->total_ref_mod = count_mod;  in init_delayed_ref_head()
764 	spin_lock_init(&head_ref->lock);  in init_delayed_ref_head()
765 	mutex_init(&head_ref->mutex);  in init_delayed_ref_head()
785 		     struct btrfs_delayed_ref_head *head_ref,  in add_delayed_ref_head()  argument
804 	trace_add_delayed_ref_head(trans->fs_info, head_ref, action);  in add_delayed_ref_head()
807 				&head_ref->href_node);  in add_delayed_ref_head()
809 		update_existing_head_ref(trans, existing, head_ref);  in add_delayed_ref_head()
814 		kmem_cache_free(btrfs_delayed_ref_head_cachep, head_ref);  in add_delayed_ref_head()
815 		head_ref = existing;  in add_delayed_ref_head()
817 		if (head_ref->is_data && head_ref->ref_mod < 0) {  in add_delayed_ref_head()
818 			delayed_refs->pending_csums += head_ref->num_bytes;  in add_delayed_ref_head()
821 							   head_ref->num_bytes);  in add_delayed_ref_head()
831 	return head_ref;  in add_delayed_ref_head()
896 	struct btrfs_delayed_ref_head *head_ref;  in btrfs_add_delayed_tree_ref()  local
917 	head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS);  in btrfs_add_delayed_tree_ref()
918 	if (!head_ref) {  in btrfs_add_delayed_tree_ref()
930 			kmem_cache_free(btrfs_delayed_ref_head_cachep, head_ref);  in btrfs_add_delayed_tree_ref()
946 	init_delayed_ref_head(head_ref, record, bytenr, num_bytes,  in btrfs_add_delayed_tree_ref()
949 	head_ref->extent_op = extent_op;  in btrfs_add_delayed_tree_ref()
958 	head_ref = add_delayed_ref_head(trans, head_ref, record,  in btrfs_add_delayed_tree_ref()
961 	ret = insert_delayed_ref(trans, delayed_refs, head_ref, &ref->node);  in btrfs_add_delayed_tree_ref()
991 	struct btrfs_delayed_ref_head *head_ref;  in btrfs_add_delayed_data_ref()  local
1022 	head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS);  in btrfs_add_delayed_data_ref()
1023 	if (!head_ref) {  in btrfs_add_delayed_data_ref()
1036 					head_ref);  in btrfs_add_delayed_data_ref()
1041 	init_delayed_ref_head(head_ref, record, bytenr, num_bytes, ref_root,  in btrfs_add_delayed_data_ref()
1043 	head_ref->extent_op = NULL;  in btrfs_add_delayed_data_ref()
1052 	head_ref = add_delayed_ref_head(trans, head_ref, record,  in btrfs_add_delayed_data_ref()
1055 	ret = insert_delayed_ref(trans, delayed_refs, head_ref, &ref->node);  in btrfs_add_delayed_data_ref()
1080 	struct btrfs_delayed_ref_head *head_ref;  in btrfs_add_delayed_extent_op()  local
1083 	head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS);  in btrfs_add_delayed_extent_op()
1084 	if (!head_ref)  in btrfs_add_delayed_extent_op()
1087 	init_delayed_ref_head(head_ref, NULL, bytenr, num_bytes, 0, 0,  in btrfs_add_delayed_extent_op()
1090 	head_ref->extent_op = extent_op;  in btrfs_add_delayed_extent_op()
1095 	add_delayed_ref_head(trans, head_ref, NULL, BTRFS_UPDATE_DELAYED_HEAD,  in btrfs_add_delayed_extent_op()