631 	put_pid(tty->pgrp);  in __tty_hangup()
633 	tty->pgrp = NULL;  in __tty_hangup()
1467 	put_pid(tty->pgrp);  in release_one_tty()
2137 		if (tty->pgrp) {  in __tty_fasync()
2138 			pid = tty->pgrp;  in __tty_fasync()
2236 	struct pid *pgrp;  in tty_do_resize()  local
2244 	pgrp = tty_get_pgrp(tty);  in tty_do_resize()
2245 	if (pgrp)  in tty_do_resize()
2246 		kill_pgrp(pgrp, SIGWINCH, 1);  in tty_do_resize()
2247 	put_pid(pgrp);  in tty_do_resize()
2996 	tty->pgrp = NULL;  in alloc_tty_struct()