[PATCH] code clean up of kswapd

Hi all,

This is only a code clean up of kswapd -
It should do almost the same.

I do not claim improved performance :-(
But improved readability :-)

Basically done to be able to add other
stuff more easily later...

[Not tried against ac8, but ac7+riel.3
 should be almost the same]

Comments?

/RogerL

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