int kill_pid_usb_asyncio(int sig, int errno, sigval_t addr,
			 struct pid *pid, const struct cred *cred)
{
	struct kernel_siginfo info;
	struct task_struct *p;
	unsigned long flags;
	int ret = -EINVAL;

	clear_siginfo(&info);
	info.si_signo = sig;
	info.si_errno = errno;
	info.si_code = SI_ASYNCIO;
	*((sigval_t *)&info.si_pid) = addr;

	if (!valid_signal(sig))
		return ret;

	rcu_read_lock();
	p = pid_task(pid, PIDTYPE_PID);
	if (!p) {
		ret = -ESRCH;
		goto out_unlock;
	}
	if (!kill_as_cred_perm(cred, p)) {
		ret = -EPERM;
		goto out_unlock;
	}
	ret = security_task_kill(p, &info, sig, cred);
	if (ret)
		goto out_unlock;

	if (sig) {
		if (lock_task_sighand(p, &flags)) {
			ret = __send_signal(sig, &info, p, PIDTYPE_TGID, false);
			unlock_task_sighand(p, &flags);
		} else
			ret = -ESRCH;
	}
out_unlock:
	rcu_read_unlock();
	return ret;
}