static void __user *u64_to_uptr(u64 value)
{
	if (is_compat_task())
		return compat_ptr(value);
	else
		return (void __user *)(unsigned long)value;
}

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.