"slightly", he says.
Yes, it was a typo, but the breakage wasn't exactly slight. Thanks for
spotting it, this bug meant that anybody doing a sched_yield() on 2.1.30
will lock up the system completely. Oops.
Of course, I don't know of any program that actually yields CPU time to
somebody else (it's a bit like "nice" - nobody uses it ;)
Linus