Unfortunately. There are places where such comments could be a good
specification on what an interface is actually meant to work like
(particularly in error cases). Currently you often can't tell if the
implementation or the caller of a function is buggy.
Not sure if they are really useful for the simple qlist.c functions (but
even there the function name does not tell me what it's doing with NULL
parameters), but it might be helpful to have a general discussion about
it. I think in general qemu is poorly commented.