Is there a better way to ask this? It would be relatively awkward for the candidate to bring up on their own, so it seems like a good idea to make sure nothing unexpected has occurred since the call was planned.
> Alright, that's enough chit chat. Curtly prod them to submit to the interrogation.
Assuming it's still good to have the call, why would you not just jump in? The call can't last forever, and I'd rather have a solid ~40 minutes of technical content with time for questions than an opening of awkward forced small talk that, especially in the context of technical candidates, there's a good chance neither of us find pleasing.
Anecdotally, I've found that most good candidates will "small talk" about the technical subject matter that gets brought up during the call, if only to appear as a person familiar with it. (Although I do get a little lucky with security related things occurring pretty regularly in the news, so it's easy to reference.)