Using I2O modules with I2O core in kernel

Hi Alan and folks,

I got asked why it gives unresolved symbols (and how to fix it) for the I2O modules. During the session I noticed this is due to the fact the I2O core is built into the kernel but the other I2O support built as module. So the quick hack to resolv that problem was adding the missing symbols into ksyms.c.

Later on I noticed its possible to avoid this hacking simple by doing the EXPORT_SYMBOL within the original source module. This was only done for the case it would have been compiled as kernel module. The patch is appended.

Michael