AcoSail/kernel_optimize_test
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fs3270: remove extra locks

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get_current_tty now does internal locking and returns a referenced object,
thus our use of tty_mutex here can go away.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox 2008-10-13 10:45:52 +01:00 committed by Linus Torvalds
parent 402fda9201
commit a90610e50b
1 changed files with 1 additions and 5 deletions
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drivers/s390/char/fs3270.c
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@ -426,18 +426,14 @@ fs3270_open(struct inode *inode, struct file *filp)
minor = iminor(filp->f_path.dentry->d_inode);
/* Check for minor 0 multiplexer. */
if (minor == 0) {
struct tty_struct *tty;
mutex_lock(&tty_mutex);
tty = get_current_tty();
struct tty_struct *tty = get_current_tty();
if (!tty || tty->driver->major != IBM_TTY3270_MAJOR) {
tty_kref_put(tty);
mutex_unlock(&tty_mutex);
rc = -ENODEV;
goto out;
}
minor = tty->index + RAW3270_FIRSTMINOR;
tty_kref_put(tty);
mutex_unlock(&tty_mutex);
}
/* Check if some other program is already using fullscreen mode. */
fp = (struct fs3270 *) raw3270_find_view(&fs3270_fn, minor);