I havent finished this and wont touch it for a few days, but should give
you a general view of the csum action. It is slightly more complex
in that it needs to at least check for the data passed from user space
to avoid doing it in the fast/data path and and so overwrittes the
default ->init().
Only thing ive done so far is to compile this. Still a lot of
validation, cleanup and meat to be added. Theres a lot that could be
done such as incremental checksums, for now this is simple and should
work albeit a little perfomance squeak here and there.
cheers,
jamal
p1
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