jbk: it's an interrupt for one of the chelsio NICs, and I initially kind of looked past it because it didn't seem interesting, but now I realized it's an error interrupt, which I don't think we often see, so that's fun

so maybe I had some transient hardware failure, or maybe IRM did something screwy

i'm wondering if there's a timing bit there -- apix_wait_till_seen() appears to spin until there's no active or pending interrupts on the cpu

so maybe that interrupt hit at the wrong time

but the fact that cpu hadn't switched for so long does seem problematic

richlowe: Probably just a side effect of the way the original construction did stuff and when we turned it into use _Static_Assert we just didn't think about it.

I'll get that up when I do the other part of this then

and we can decide if I should use _static_assert() in the review