taglinefilesource code
tty_opened1988drivers/char/scc.cscc->tty_opened++;
tty_opened2020drivers/char/scc.cif(scc->tty_opened)
tty_opened2022drivers/char/scc.cscc->tty_opened--;
tty_opened233include/linux/scc.hchar tty_opened;  /* No. of open() calls... */