Kernel module symbol versioning?

["Kendall Bennett" <KendallB@scitechsoft.com>]

Hi,

I have been reading the book "Linux Device Drivers, 2nd Edition" and have 
some questions about symbol versioning. In Chapter 11 it mentions that 
you can use the <linux/modversions.h> header file to compile your module 
with symbol versions enabled, so that your module will load on multiple 
kernels and fail if the symbol CRC's do not match. I tested this out on a 
simple test module, but this module fails to load unless I pass the '-f' 
flag to insmod (Red Hat 7.3 and 8.0). 

Is there a way to compile the module so that insmod will only complain if 
there is a version conflict? Or do you always have to use -f in this case 
to force the module to load? If you have to do that, will -f still fail 
to load if the versioned symbols don't match?

Regards,

---
Kendall Bennett
Chief Executive Officer
SciTech Software, Inc.
Phone: (530) 894 8400
http://www.scitechsoft.com

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