tty: Replace open-coded tty_get_pgrp()
Replace open-coded instances of tty_get_pgrp().
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Reviewed-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index 7c4447a..4c0218d 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -207,15 +207,12 @@
/* Send a signal to the slave */
static int pty_signal(struct tty_struct *tty, int sig)
{
- unsigned long flags;
struct pid *pgrp;
if (tty->link) {
- spin_lock_irqsave(&tty->link->ctrl_lock, flags);
- pgrp = get_pid(tty->link->pgrp);
- spin_unlock_irqrestore(&tty->link->ctrl_lock, flags);
-
- kill_pgrp(pgrp, sig, 1);
+ pgrp = tty_get_pgrp(tty->link);
+ if (pgrp)
+ kill_pgrp(pgrp, sig, 1);
put_pid(pgrp);
}
return 0;
@@ -278,7 +275,6 @@
static int pty_resize(struct tty_struct *tty, struct winsize *ws)
{
struct pid *pgrp, *rpgrp;
- unsigned long flags;
struct tty_struct *pty = tty->link;
/* For a PTY we need to lock the tty side */
@@ -286,17 +282,9 @@
if (!memcmp(ws, &tty->winsize, sizeof(*ws)))
goto done;
- /* Get the PID values and reference them so we can
- avoid holding the tty ctrl lock while sending signals.
- We need to lock these individually however. */
-
- spin_lock_irqsave(&tty->ctrl_lock, flags);
- pgrp = get_pid(tty->pgrp);
- spin_unlock_irqrestore(&tty->ctrl_lock, flags);
-
- spin_lock_irqsave(&pty->ctrl_lock, flags);
- rpgrp = get_pid(pty->pgrp);
- spin_unlock_irqrestore(&pty->ctrl_lock, flags);
+ /* Signal the foreground process group of both ptys */
+ pgrp = tty_get_pgrp(tty);
+ rpgrp = tty_get_pgrp(pty);
if (pgrp)
kill_pgrp(pgrp, SIGWINCH, 1);
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 3d71642..6bf5f44 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -2324,18 +2324,14 @@
int tty_do_resize(struct tty_struct *tty, struct winsize *ws)
{
struct pid *pgrp;
- unsigned long flags;
/* Lock the tty */
mutex_lock(&tty->winsize_mutex);
if (!memcmp(ws, &tty->winsize, sizeof(*ws)))
goto done;
- /* Get the PID values and reference them so we can
- avoid holding the tty ctrl lock while sending signals */
- spin_lock_irqsave(&tty->ctrl_lock, flags);
- pgrp = get_pid(tty->pgrp);
- spin_unlock_irqrestore(&tty->ctrl_lock, flags);
+ /* Signal the foreground process group */
+ pgrp = tty_get_pgrp(tty);
if (pgrp)
kill_pgrp(pgrp, SIGWINCH, 1);
put_pid(pgrp);