sysctl_handle_64
int sysctl_handle_64(SYSCTL_HANDLER_ARGS);
ptr, val, sysctl_handle_64, "Q", descr)
ptr, 0, sysctl_handle_64, "Q", descr)
ptr, val, sysctl_handle_64, "QU", descr)
ptr, 0, sysctl_handle_64, "QU", descr)