[arch-general] 11 minutes mode

Anybody knows how to make sure that the kernel will not mess with the hardware clock every 11 minutes? The proper way would be to use a kernel that doesn't try to do it, but I want to use Arch's standard kernel, which has CONFIG_GENERIC_CMOS_UPDATE=y. Maybe something in /proc? I don't know whether the kernel in my system is even doing it; I don't use ntp, but the documentation doesn't say what triggers the 11m mode, it just gives examples... TIA Jorge Almeida