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

(cvs-mode-commit SETUP)

Check in all marked files, or the current file.
The user will be asked for a log message in a buffer.
The buffer's mode and name is determined by the "message" setting
of `cvs-buffer-name-alist'.
The POSTPROC specified there (typically `log-edit') is then called,
passing it the SETUP argument.