Is it "roll call" or "role call"??

Help please! I had to take "minutes" for a meeting tonight, and I can't find anywhere what the correct way of writing "role/roll call" is.

Mark insists that it is "roll"
I say "role"

Help! Which is it??? :confused: :rolleyes:

Scott and I think "roll". Sorry, Anna! :p

I also thought it was "roll"

:o Ya'll are right! I realize that now. I've changed my documents.

Thanks!! :)