cvs-mode-force-command is an interactive compiled Lisp function in `pcvs.el'.

(cvs-mode-force-command ARG)

Force the next cvs command to operate on all the selected files.
By default, cvs commands only operate on files on which the command
"makes sense". This overrides the safety feature on the next cvs command.
It actually behaves as a toggle. If prefixed by C-u C-u,
the override will persist until the next toggle.