taglinefilesource code
frsig513drivers/char/tty_io.cvt_cons[new_console]->vt_mode.frsig = 0;
frsig695drivers/char/vt.cvt_cons[console]->vt_mode.frsig = 0;
frsig712drivers/char/vt.cput_user(vt_cons[console]->vt_mode.frsig, &vtmode->frsig);
frsig13include/linux/vt.hshort frsig;    /* unused (set to 0) */