627 	put_pid(tty->pgrp);  in __tty_hangup()
629 	tty->pgrp = NULL;  in __tty_hangup()
1444 	put_pid(tty->pgrp);  in release_one_tty()
2116 		if (tty->pgrp) {  in __tty_fasync()
2117 			pid = tty->pgrp;  in __tty_fasync()
2215 	struct pid *pgrp;  in tty_do_resize()  local
2223 	pgrp = tty_get_pgrp(tty);  in tty_do_resize()
2224 	if (pgrp)  in tty_do_resize()
2225 		kill_pgrp(pgrp, SIGWINCH, 1);  in tty_do_resize()
2226 	put_pid(pgrp);  in tty_do_resize()
2829 	tty->pgrp = NULL;  in alloc_tty_struct()