diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2013-03-06 13:20:55 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-15 22:02:32 +0100 |
| commit | bc30c3b23bb953fc6eb59e7ac6ecb48d92962bb0 (patch) | |
| tree | ae741d582aa942a1f8ba1c7b4dea7e29b050980c /drivers/tty/tty_io.c | |
| parent | tty: Fix spinlock flavor in non-atomic __tty_hangup() (diff) | |
| download | linux-bc30c3b23bb953fc6eb59e7ac6ecb48d92962bb0.tar.xz linux-bc30c3b23bb953fc6eb59e7ac6ecb48d92962bb0.zip | |
tty: Use spin_lock() inside existing critical region
The interrupt state does not need to be saved, disabled and
restored here; interrupts are already off because this lock
is bracketed by spin_lock_irq/spin_unlock_irq.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Acked-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/tty_io.c')
| -rw-r--r-- | drivers/tty/tty_io.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index fb50442fd2a4..2661e86a2272 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -545,7 +545,6 @@ EXPORT_SYMBOL_GPL(tty_wakeup); static int tty_signal_session_leader(struct tty_struct *tty) { struct task_struct *p; - unsigned long flags; int refs = 0; read_lock(&tasklist_lock); @@ -565,10 +564,10 @@ static int tty_signal_session_leader(struct tty_struct *tty) __group_send_sig_info(SIGHUP, SEND_SIG_PRIV, p); __group_send_sig_info(SIGCONT, SEND_SIG_PRIV, p); put_pid(p->signal->tty_old_pgrp); /* A noop */ - spin_lock_irqsave(&tty->ctrl_lock, flags); + spin_lock(&tty->ctrl_lock); if (tty->pgrp) p->signal->tty_old_pgrp = get_pid(tty->pgrp); - spin_unlock_irqrestore(&tty->ctrl_lock, flags); + spin_unlock(&tty->ctrl_lock); spin_unlock_irq(&p->sighand->siglock); } while_each_pid_task(tty->session, PIDTYPE_SID, p); } |