I_ICRNL 1308 drivers/tty/n_tty.c if (I_ICRNL(tty)) I_ICRNL 1818 drivers/tty/n_tty.c I_ICRNL(tty) || I_INLCR(tty) || L_ICANON(tty) || I_ICRNL 1823 drivers/tty/n_tty.c if (I_IGNCR(tty) || I_ICRNL(tty))