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Commit d3bda529 authored by Jiri Slaby's avatar Jiri Slaby Committed by Greg Kroah-Hartman
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TTY: get rid of BTM around devpts_* 



devpts operations are protected by inode mutexes and dentry
refcounting. There is no need to hold BTM.

Signed-off-by: default avatarJiri Slaby <jslaby@suse.cz>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a50f724a

drivers/tty/pty.c

+2 −4
Original line number Diff line number Diff line
@@ -54,8 +54,8 @@ static void pty_close(struct tty_struct *tty, struct file *filp) 
	wake_up_interruptible(&tty->link->write_wait);

	if (tty->driver->subtype == PTY_TYPE_MASTER) {

		set_bit(TTY_OTHER_CLOSED, &tty->flags);

		devpts_pty_kill(tty->link);

		tty_unlock();

		devpts_pty_kill(tty->link);

		tty_vhangup(tty->link);

		tty_lock();

	}
@@ -613,9 +613,7 @@ static int ptmx_open(struct inode *inode, struct file *filp) 
		return retval;



	/* find a device that is not in use. */

	tty_lock();

	index = devpts_new_index(inode);

	tty_unlock();

	if (index < 0) {

		retval = index;

		goto err_file;
@@ -650,8 +648,8 @@ err_release: 
	tty_release(inode, filp);

	return retval;

out:

	devpts_kill_index(inode, index);

	tty_unlock();

	devpts_kill_index(inode, index);

err_file:

	tty_free_file(filp);

	return retval;

drivers/tty/tty_io.c

+1 −1
Original line number Diff line number Diff line
@@ -1789,11 +1789,11 @@ int tty_release(struct inode *inode, struct file *filp) 
	 * the slots and preserving the termios structure.

	 */

	release_tty(tty, idx);

	tty_unlock();



	/* Make this pty number available for reallocation */

	if (devpts)

		devpts_kill_index(inode, idx);

	tty_unlock();

	return 0;

}