I think we have a consensus that programming questions are generally off-topic and belong on Stack Overflow. (I thought this was explicitly mentioned in the FAQ — is my memory failing or did it change?) Borderline questions about the API are ok, but not questions about programming in C.
So what do we do about this question which was migrated from Stack Overflow (by one Jeff Atwood)? I see a question about programming a Linux driver, firmly from the programmer's perspective, so I find it on-topic on Stack Overflow and off-topic on Unix Stack Exchange.
Jeff, could you explain this migration?