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Subject[PATCH 5/5] TTY: get rid of BTM around devpts_*
Date
devpts operations are protected by inode mutexes and dentry
refcounting. There is no need to hold BTM.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
drivers/tty/pty.c | 6 ++----
drivers/tty/tty_io.c | 2 +-
2 files changed, 3 insertions(+), 5 deletions(-)
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index ddec9f3..39afd04 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -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;
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 44736f9..ea7ebe2 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -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;
}

--
1.7.8.3



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