645 	put_pid(tty->ctrl.pgrp);  in __tty_hangup()
647 	tty->ctrl.pgrp = NULL;  in __tty_hangup()
1556 	put_pid(tty->ctrl.pgrp);  in release_one_tty()
2252 		if (tty->ctrl.pgrp) {  in __tty_fasync()
2253 			pid = tty->ctrl.pgrp;  in __tty_fasync()
2351 	struct pid *pgrp;  in tty_do_resize()  local
2359 	pgrp = tty_get_pgrp(tty);  in tty_do_resize()
2360 	if (pgrp)  in tty_do_resize()
2361 		kill_pgrp(pgrp, SIGWINCH, 1);  in tty_do_resize()
2362 	put_pid(pgrp);  in tty_do_resize()
3138 	tty->ctrl.pgrp = NULL;  in alloc_tty_struct()