731 static void init_delayed_ref_head(struct btrfs_delayed_ref_head *head_ref,  in init_delayed_ref_head()  argument
767 	refcount_set(&head_ref->refs, 1);  in init_delayed_ref_head()
768 	head_ref->bytenr = bytenr;  in init_delayed_ref_head()
769 	head_ref->num_bytes = num_bytes;  in init_delayed_ref_head()
770 	head_ref->ref_mod = count_mod;  in init_delayed_ref_head()
771 	head_ref->must_insert_reserved = must_insert_reserved;  in init_delayed_ref_head()
772 	head_ref->is_data = is_data;  in init_delayed_ref_head()
773 	head_ref->is_system = is_system;  in init_delayed_ref_head()
774 	head_ref->ref_tree = RB_ROOT_CACHED;  in init_delayed_ref_head()
775 	INIT_LIST_HEAD(&head_ref->ref_add_list);  in init_delayed_ref_head()
776 	RB_CLEAR_NODE(&head_ref->href_node);  in init_delayed_ref_head()
777 	head_ref->processing = 0;  in init_delayed_ref_head()
778 	head_ref->total_ref_mod = count_mod;  in init_delayed_ref_head()
779 	spin_lock_init(&head_ref->lock);  in init_delayed_ref_head()
780 	mutex_init(&head_ref->mutex);  in init_delayed_ref_head()
800 		     struct btrfs_delayed_ref_head *head_ref,  in add_delayed_ref_head()  argument
820 	trace_add_delayed_ref_head(trans->fs_info, head_ref, action);  in add_delayed_ref_head()
823 				&head_ref->href_node);  in add_delayed_ref_head()
825 		update_existing_head_ref(trans, existing, head_ref,  in add_delayed_ref_head()
831 		kmem_cache_free(btrfs_delayed_ref_head_cachep, head_ref);  in add_delayed_ref_head()
832 		head_ref = existing;  in add_delayed_ref_head()
836 		if (head_ref->is_data && head_ref->ref_mod < 0) {  in add_delayed_ref_head()
837 			delayed_refs->pending_csums += head_ref->num_bytes;  in add_delayed_ref_head()
840 							   head_ref->num_bytes);  in add_delayed_ref_head()
850 		*new_ref_mod = head_ref->total_ref_mod;  in add_delayed_ref_head()
852 	return head_ref;  in add_delayed_ref_head()
918 	struct btrfs_delayed_ref_head *head_ref;  in btrfs_add_delayed_tree_ref()  local
939 	head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS);  in btrfs_add_delayed_tree_ref()
940 	if (!head_ref) {  in btrfs_add_delayed_tree_ref()
952 			kmem_cache_free(btrfs_delayed_ref_head_cachep, head_ref);  in btrfs_add_delayed_tree_ref()
968 	init_delayed_ref_head(head_ref, record, bytenr, num_bytes,  in btrfs_add_delayed_tree_ref()
971 	head_ref->extent_op = extent_op;  in btrfs_add_delayed_tree_ref()
980 	head_ref = add_delayed_ref_head(trans, head_ref, record,  in btrfs_add_delayed_tree_ref()
984 	ret = insert_delayed_ref(trans, delayed_refs, head_ref, &ref->node);  in btrfs_add_delayed_tree_ref()
1015 	struct btrfs_delayed_ref_head *head_ref;  in btrfs_add_delayed_data_ref()  local
1046 	head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS);  in btrfs_add_delayed_data_ref()
1047 	if (!head_ref) {  in btrfs_add_delayed_data_ref()
1060 					head_ref);  in btrfs_add_delayed_data_ref()
1065 	init_delayed_ref_head(head_ref, record, bytenr, num_bytes, ref_root,  in btrfs_add_delayed_data_ref()
1067 	head_ref->extent_op = NULL;  in btrfs_add_delayed_data_ref()
1076 	head_ref = add_delayed_ref_head(trans, head_ref, record,  in btrfs_add_delayed_data_ref()
1080 	ret = insert_delayed_ref(trans, delayed_refs, head_ref, &ref->node);  in btrfs_add_delayed_data_ref()
1105 	struct btrfs_delayed_ref_head *head_ref;  in btrfs_add_delayed_extent_op()  local
1108 	head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS);  in btrfs_add_delayed_extent_op()
1109 	if (!head_ref)  in btrfs_add_delayed_extent_op()
1112 	init_delayed_ref_head(head_ref, NULL, bytenr, num_bytes, 0, 0,  in btrfs_add_delayed_extent_op()
1115 	head_ref->extent_op = extent_op;  in btrfs_add_delayed_extent_op()
1120 	add_delayed_ref_head(trans, head_ref, NULL, BTRFS_UPDATE_DELAYED_HEAD,  in btrfs_add_delayed_extent_op()