[parisc-linux] Bus Speed

[marc]

When Linux starts up I see a message saying:

ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx

I have a C180 and the bus speed at startup says:

Central Bus Speed (in MHz) :        120

so I'm assuming I should add the boot parameter as mentioned above.
Will I see any performance gain?

Thanks,
-Marc