Re: Compiling a module for different kernel versions

[Chris Wright <chris@wirex.com>]

* Mike Voytovich (mikev@digeo.com) wrote:
> 
> CONFIG_MODVERSIONS (Set version information on all module symbols) was
> meant to allow you to use the same module with different kernel
> versions, as long as the kernel interfaces used by the module were the
> same.
> 
> Is is suggested to not use this anymore or something?

MODVERSIONS is broken in many ways.  Consider the case where a
core structure (say task_struct) has changed.  The module may load,
but structure offsets now have different meanings.  Also, even with
MODVERSIONS you can't load a module compiled for SMP to a UP kernel,
you'll have missing symbols.  You can make it work, but if you aren't
really clear on what impliicit assumptions your module has about the
kernel, you are _much_ better off simply recompiling.

cheers,
-chris
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