modprobe patches

[Timo Teräs]

Hi, 

Here's couple of patches for modprobe. I've been trying to speed it up to
optimize my boot sequence. I also a noticed a stack overflow problem.

Hence the two patches:
- other to fix stack corruption (include in fixes)
- other for the speed up stuff, for trunk

The speed up probably increases size a bit, but I think it's worth it.
Comments, appreciated.

- Timo
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