[dm-crypt] How to activate hash module?

[Maciej Pilichowski <bluedzins@wp.pl>]

Hello,

  I am upgrading my entire system (openSUSE 11.1->11.4), and now I am 
facing such a problem. I have hash module present in both systems, I 
can check it by executing:
ls /lib/modules/$(uname -r)/kernel/crypto

  It is named the same. The hash module is _not_ present as loaded 
module in both versions:

lsmod

  However I can and I use this hash module in OS11.1 without any 
problem, simply by executing cryptsetup (and there are no complains 
about my choice), but when I execute cryptsetup on OS11.4 then it 
says the used hash is not supported.

  Just of curiosity I tried to load the module explicitly (modprobe) 
in 11.4 and then execute cryptsetup again, but it still stated the 
hash is not supported.

  So, the question is: how to activate this hash module (for the 
record: in OS11.1 I didn't have to do anything about it)?

  Thank you in advance. If it is not necessity, I would like to talk 
about problem generally, not about this or that specific module.

Kind regards,