630 	put_pid(tty->pgrp);  in __tty_hangup()
632 	tty->pgrp = NULL;  in __tty_hangup()
1547 	put_pid(tty->pgrp);  in release_one_tty()
2217 		if (tty->pgrp) {  in __tty_fasync()
2218 			pid = tty->pgrp;  in __tty_fasync()
2316 	struct pid *pgrp;  in tty_do_resize()  local
2324 	pgrp = tty_get_pgrp(tty);  in tty_do_resize()
2325 	if (pgrp)  in tty_do_resize()
2326 		kill_pgrp(pgrp, SIGWINCH, 1);  in tty_do_resize()
2327 	put_pid(pgrp);  in tty_do_resize()
3082 	tty->pgrp = NULL;  in alloc_tty_struct()