In __cpu_simple_lock(), do not hog the bus with exclusive accesses; if xmem didn't return the expected value, spin doing regular loads until it appears we have a chance to grab the lock again.
In __cpu_simple_lock(), do not hog the bus with exclusive accesses; if
xmem didn't return the expected value, spin doing regular loads until it
appears we have a chance to grab the lock again.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars