Stir

Stir is a 1980 Australian film directed by Stephen Wallace in his feature directorial debut. The prison film was written by Bob Jewson, based upon his own experience, while incarcerated, of the 1974 prison riot at Bathurst Correctional Complex and the subsequent Royal Commission into New South Wales Prisons. The film was shot in Clare Valley, Gladstone and the Flinders Ranges in South Australia. It premiered at the 1980 Cannes Film Festival.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.