NiosII 5.0 datacache linesize > 4

A question for Microtronix:

I tried setting the Datacache line size to 32bytes in my NiosII 5.0 design, as the linux kernel cache code seems to handle line sizes other than the default 4bytes, but ...

This triggers an endless loop of kernel BUG messages (from mm/memory.c I think) at bootup as soon as the rc script starts.

Any ideas to what should be changed/added in the kernel source (in arch/nios2nommu/mm/memory.c I guess) to get the datacache to behave ?