HelenOS sources

ns8250_dev_cleanup  472 uspace/drv/char/ns8250/ns8250.c 	ns8250_dev_cleanup(ns);
ns8250_dev_cleanup  937 uspace/drv/char/ns8250/ns8250.c 		ns8250_dev_cleanup(ns);
ns8250_dev_cleanup  964 uspace/drv/char/ns8250/ns8250.c 	ns8250_dev_cleanup(ns);
HelenOS homepage, sources at GitHub