749 static void init_delayed_ref_head(struct btrfs_delayed_ref_head *head_ref,  in init_delayed_ref_head()  argument
785 	refcount_set(&head_ref->refs, 1);  in init_delayed_ref_head()
786 	head_ref->bytenr = bytenr;  in init_delayed_ref_head()
787 	head_ref->num_bytes = num_bytes;  in init_delayed_ref_head()
788 	head_ref->ref_mod = count_mod;  in init_delayed_ref_head()
789 	head_ref->must_insert_reserved = must_insert_reserved;  in init_delayed_ref_head()
790 	head_ref->is_data = is_data;  in init_delayed_ref_head()
791 	head_ref->is_system = is_system;  in init_delayed_ref_head()
792 	head_ref->ref_tree = RB_ROOT_CACHED;  in init_delayed_ref_head()
793 	INIT_LIST_HEAD(&head_ref->ref_add_list);  in init_delayed_ref_head()
794 	RB_CLEAR_NODE(&head_ref->href_node);  in init_delayed_ref_head()
795 	head_ref->processing = 0;  in init_delayed_ref_head()
796 	head_ref->total_ref_mod = count_mod;  in init_delayed_ref_head()
797 	spin_lock_init(&head_ref->lock);  in init_delayed_ref_head()
798 	mutex_init(&head_ref->mutex);  in init_delayed_ref_head()
818 		     struct btrfs_delayed_ref_head *head_ref,  in add_delayed_ref_head()  argument
837 	trace_add_delayed_ref_head(trans->fs_info, head_ref, action);  in add_delayed_ref_head()
840 				&head_ref->href_node);  in add_delayed_ref_head()
842 		update_existing_head_ref(trans, existing, head_ref);  in add_delayed_ref_head()
847 		kmem_cache_free(btrfs_delayed_ref_head_cachep, head_ref);  in add_delayed_ref_head()
848 		head_ref = existing;  in add_delayed_ref_head()
850 		u64 flags = btrfs_ref_head_to_space_flags(head_ref);  in add_delayed_ref_head()
852 		if (head_ref->is_data && head_ref->ref_mod < 0) {  in add_delayed_ref_head()
853 			delayed_refs->pending_csums += head_ref->num_bytes;  in add_delayed_ref_head()
856 							   head_ref->num_bytes);  in add_delayed_ref_head()
858 		if (head_ref->ref_mod < 0)  in add_delayed_ref_head()
860 						     head_ref->num_bytes);  in add_delayed_ref_head()
869 	return head_ref;  in add_delayed_ref_head()
934 	struct btrfs_delayed_ref_head *head_ref;  in btrfs_add_delayed_tree_ref()  local
955 	head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS);  in btrfs_add_delayed_tree_ref()
956 	if (!head_ref) {  in btrfs_add_delayed_tree_ref()
968 			kmem_cache_free(btrfs_delayed_ref_head_cachep, head_ref);  in btrfs_add_delayed_tree_ref()
984 	init_delayed_ref_head(head_ref, record, bytenr, num_bytes,  in btrfs_add_delayed_tree_ref()
987 	head_ref->extent_op = extent_op;  in btrfs_add_delayed_tree_ref()
996 	head_ref = add_delayed_ref_head(trans, head_ref, record,  in btrfs_add_delayed_tree_ref()
999 	ret = insert_delayed_ref(trans, delayed_refs, head_ref, &ref->node);  in btrfs_add_delayed_tree_ref()
1029 	struct btrfs_delayed_ref_head *head_ref;  in btrfs_add_delayed_data_ref()  local
1060 	head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS);  in btrfs_add_delayed_data_ref()
1061 	if (!head_ref) {  in btrfs_add_delayed_data_ref()
1074 					head_ref);  in btrfs_add_delayed_data_ref()
1079 	init_delayed_ref_head(head_ref, record, bytenr, num_bytes, ref_root,  in btrfs_add_delayed_data_ref()
1081 	head_ref->extent_op = NULL;  in btrfs_add_delayed_data_ref()
1090 	head_ref = add_delayed_ref_head(trans, head_ref, record,  in btrfs_add_delayed_data_ref()
1093 	ret = insert_delayed_ref(trans, delayed_refs, head_ref, &ref->node);  in btrfs_add_delayed_data_ref()
1118 	struct btrfs_delayed_ref_head *head_ref;  in btrfs_add_delayed_extent_op()  local
1121 	head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS);  in btrfs_add_delayed_extent_op()
1122 	if (!head_ref)  in btrfs_add_delayed_extent_op()
1125 	init_delayed_ref_head(head_ref, NULL, bytenr, num_bytes, 0, 0,  in btrfs_add_delayed_extent_op()
1128 	head_ref->extent_op = extent_op;  in btrfs_add_delayed_extent_op()
1133 	add_delayed_ref_head(trans, head_ref, NULL, BTRFS_UPDATE_DELAYED_HEAD,  in btrfs_add_delayed_extent_op()