diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2014-10-16 20:59:43 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-06 01:26:13 +0100 |
| commit | bce65f18316cc6dbf858b1577a36956d30caa315 (patch) | |
| tree | bf66ea3736f4af0ffe6082516bc0e05c155b9b02 /drivers/tty/tty_io.c | |
| parent | tty: Reorder proc_set_tty() and related fns (diff) | |
| download | linux-bce65f18316cc6dbf858b1577a36956d30caa315.tar.xz linux-bce65f18316cc6dbf858b1577a36956d30caa315.zip | |
tty: Remove tsk parameter from proc_set_tty()
Only the current task itself can set its controlling tty (other
than before the task has been forked). Equivalent to existing usage.
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>
Diffstat (limited to 'drivers/tty/tty_io.c')
| -rw-r--r-- | drivers/tty/tty_io.c | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index 496657508772..3d71642b18ad 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -504,7 +504,7 @@ void proc_clear_tty(struct task_struct *p) /* Called under the sighand lock */ -static void __proc_set_tty(struct task_struct *tsk, struct tty_struct *tty) +static void __proc_set_tty(struct tty_struct *tty) { if (tty) { unsigned long flags; @@ -512,24 +512,24 @@ static void __proc_set_tty(struct task_struct *tsk, struct tty_struct *tty) spin_lock_irqsave(&tty->ctrl_lock, flags); put_pid(tty->session); put_pid(tty->pgrp); - tty->pgrp = get_pid(task_pgrp(tsk)); + tty->pgrp = get_pid(task_pgrp(current)); spin_unlock_irqrestore(&tty->ctrl_lock, flags); - tty->session = get_pid(task_session(tsk)); - if (tsk->signal->tty) { + tty->session = get_pid(task_session(current)); + if (current->signal->tty) { printk(KERN_DEBUG "tty not NULL!!\n"); - tty_kref_put(tsk->signal->tty); + tty_kref_put(current->signal->tty); } } - put_pid(tsk->signal->tty_old_pgrp); - tsk->signal->tty = tty_kref_get(tty); - tsk->signal->tty_old_pgrp = NULL; + put_pid(current->signal->tty_old_pgrp); + current->signal->tty = tty_kref_get(tty); + current->signal->tty_old_pgrp = NULL; } -static void proc_set_tty(struct task_struct *tsk, struct tty_struct *tty) +static void proc_set_tty(struct tty_struct *tty) { - spin_lock_irq(&tsk->sighand->siglock); - __proc_set_tty(tsk, tty); - spin_unlock_irq(&tsk->sighand->siglock); + spin_lock_irq(¤t->sighand->siglock); + __proc_set_tty(tty); + spin_unlock_irq(¤t->sighand->siglock); } struct tty_struct *get_current_tty(void) @@ -2156,7 +2156,7 @@ retry_open: current->signal->leader && !current->signal->tty && tty->session == NULL) - __proc_set_tty(current, tty); + __proc_set_tty(tty); spin_unlock_irq(¤t->sighand->siglock); tty_unlock(tty); mutex_unlock(&tty_mutex); @@ -2482,7 +2482,7 @@ static int tiocsctty(struct tty_struct *tty, int arg) goto unlock; } } - proc_set_tty(current, tty); + proc_set_tty(tty); unlock: mutex_unlock(&tty_mutex); return ret; |