Andi Kleen wrote:

quoted

<rant>
Let me see... You throw code like that and expect someone to actually 
understand it in one year, and be able to correct a bug ?

To be honest I don't expect any bugs in this function.

quoted

</rant>

Please add something, an URL or even better a nice explanation, per favor...

It's straight out of Hacker's delight which is referenced in the commit
log.

Referencing it in a comment would have been a better idea.

	-hpa