I skimmed through the LWN article and it appears to oversimplify the situation implying that bucket lists are singly-linked. They aren't (or at least they weren

I skimmed through the LWN article and it appears to oversimplify the situation implying that bucket lists are singly-linked. They aren't (or at least they weren't in kernel's hlist few years ago), there's also a back pointer and I'm not really sure how this fits in, i.e. one can't simply re-link tail of one bucket to the head of another when merging them... In other words it seems like LWN got the whole thing dumbed down significantly, no?