[maemo-developers] N900 kernel module recompile

[From: Frantisek Dufka]

Nils Faerber wrote:
> Then kernel config:
> cp arch/arm/configs/rx51_defconfig ./.config
> make oldconfig
> 
> A "make modules" does cleanly compile the modules. Fine so far (except
> for that te modules are *huge* and a "arm-none-linux-gnueabi-strip -R
> .not -R .comment --strip-unneeded" seems reasonable).

Looks like this strips module version symbols too. Tried similar 
approach with same result before.

> 
> But when I try to load one of the new modules I get:
> 	-1 Invalid module format
> And dmesg shows:
> 	"no symbol version for struct_module"

In addition I got hit by message saying that the version does not match. 
I did some 'harmless' changes to kernel configuration before and found 
them not to be so harmless wrt symbol versions :-(

Even when copying original config back and recompiling kernel and 
modules (trying also with make clean, make mrproper) they were still 
different. I had to restore Module.symvers file from kernel source.