static int hwspin_lock_register_single()

in hwspinlock_core.c [421:444]

• 17 lines of code
• 3 McCabe index (conditional complexity)

static int hwspin_lock_register_single(struct hwspinlock *hwlock, int id)
{
	struct hwspinlock *tmp;
	int ret;

	mutex_lock(&hwspinlock_tree_lock);

	ret = radix_tree_insert(&hwspinlock_tree, id, hwlock);
	if (ret) {
		if (ret == -EEXIST)
			pr_err("hwspinlock id %d already exists!\n", id);
		goto out;
	}

	/* mark this hwspinlock as available */
	tmp = radix_tree_tag_set(&hwspinlock_tree, id, HWSPINLOCK_UNUSED);

	/* self-sanity check which should never fail */
	WARN_ON(tmp != hwlock);

out:
	mutex_unlock(&hwspinlock_tree_lock);
	return 0;
}