IMA: use list_splice_tail_init_rcu() instead of its open coded variant

 */

void ima_update_policy(void)

{

	struct list_head *first, *last, *policy;

	struct list_head *policy = &ima_policy_rules;

	/* append current policy with the new rules */

	first = (&ima_temp_rules)->next;

	last = (&ima_temp_rules)->prev;

	policy = &ima_policy_rules;

	synchronize_rcu();

	last->next = policy;

	rcu_assign_pointer(list_next_rcu(policy->prev), first);

	first->prev = policy->prev;

	policy->prev = last;

	/* prepare for the next policy rules addition */

	INIT_LIST_HEAD(&ima_temp_rules);

	list_splice_tail_init_rcu(&ima_temp_rules, policy, synchronize_rcu);

	if (ima_rules != policy) {

		ima_policy_flag = 0;