tty_io: remove casts from void*

Remove unnesessary casts from void*.

Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/char/tty_io.c

@@ -893,7 +893,7 @@ static ssize_t tty_read(struct file *file, char __user *buf, size_t count,
 	struct inode *inode;
 	struct tty_ldisc *ld;
 
-	tty = (struct tty_struct *)file->private_data;
+	tty = file->private_data;
 	inode = file->f_path.dentry->d_inode;
 	if (tty_paranoia_check(tty, inode, "tty_read"))
 		return -EIO;
@@ -1070,7 +1070,7 @@ static ssize_t tty_write(struct file *file, const char __user *buf,
 	ssize_t ret;
 	struct tty_ldisc *ld;
 
-	tty = (struct tty_struct *)file->private_data;
+	tty = file->private_data;
 	if (tty_paranoia_check(tty, inode, "tty_write"))
 		return -EIO;
 	if (!tty || !tty->ops->write ||
@@ -1513,7 +1513,7 @@ int tty_release(struct inode *inode, struct file *filp)
 	int	idx;
 	char	buf[64];
 
-	tty = (struct tty_struct *)filp->private_data;
+	tty = filp->private_data;
 	if (tty_paranoia_check(tty, inode, "tty_release_dev"))
 		return 0;
 
@@ -1920,7 +1920,7 @@ static unsigned int tty_poll(struct file *filp, poll_table *wait)
 	struct tty_ldisc *ld;
 	int ret = 0;
 
-	tty = (struct tty_struct *)filp->private_data;
+	tty = filp->private_data;
 	if (tty_paranoia_check(tty, filp->f_path.dentry->d_inode, "tty_poll"))
 		return 0;
 
@@ -1937,7 +1937,7 @@ static int __tty_fasync(int fd, struct file *filp, int on)
 	unsigned long flags;
 	int retval = 0;
 
-	tty = (struct tty_struct *)filp->private_data;
+	tty = filp->private_data;
 	if (tty_paranoia_check(tty, filp->f_path.dentry->d_inode, "tty_fasync"))
 		goto out;
 
@@ -2497,7 +2497,7 @@ long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	struct tty_ldisc *ld;
 	struct inode *inode = file->f_dentry->d_inode;
 
-	tty = (struct tty_struct *)file->private_data;
+	tty = file->private_data;
 	if (tty_paranoia_check(tty, inode, "tty_ioctl"))
 		return -EINVAL;