diff options
| author | Ingo Molnar <mingo@kernel.org> | 2015-03-05 20:52:18 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-03-05 20:52:18 +0100 |
| commit | 33ca8a53f262b4af40611bea331b8c87d133af72 (patch) | |
| tree | d6468c820a556c4915bcb5b761204a0fb19e8225 /drivers/tty/tty_mutex.c | |
| parent | db2dcb4f91d5fec5c346a82c309187ee821e2495 (diff) | |
| parent | 13a7a6ac0a11197edcd0f756a035f472b42cdf8b (diff) | |
Merge tag 'v4.0-rc2' into irq/core, to refresh the tree before applying new changes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/tty/tty_mutex.c')
| -rw-r--r-- | drivers/tty/tty_mutex.c | 18 |
1 files changed, 2 insertions, 16 deletions
diff --git a/drivers/tty/tty_mutex.c b/drivers/tty/tty_mutex.c index 4486741190c4..0efcf713b756 100644 --- a/drivers/tty/tty_mutex.c +++ b/drivers/tty/tty_mutex.c @@ -4,18 +4,8 @@ #include <linux/semaphore.h> #include <linux/sched.h> -/* - * Nested tty locks are necessary for releasing pty pairs. - * The stable lock order is master pty first, then slave pty. - */ - /* Legacy tty mutex glue */ -enum { - TTY_MUTEX_NORMAL, - TTY_MUTEX_SLAVE, -}; - /* * Getting the big tty mutex. */ @@ -46,12 +36,8 @@ EXPORT_SYMBOL(tty_unlock); void __lockfunc tty_lock_slave(struct tty_struct *tty) { - if (tty && tty != tty->link) { - WARN_ON(!mutex_is_locked(&tty->link->legacy_mutex) || - !tty->driver->type == TTY_DRIVER_TYPE_PTY || - !tty->driver->type == PTY_TYPE_SLAVE); + if (tty && tty != tty->link) tty_lock(tty); - } } void __lockfunc tty_unlock_slave(struct tty_struct *tty) @@ -62,5 +48,5 @@ void __lockfunc tty_unlock_slave(struct tty_struct *tty) void tty_set_lock_subclass(struct tty_struct *tty) { - lockdep_set_subclass(&tty->legacy_mutex, TTY_MUTEX_SLAVE); + lockdep_set_subclass(&tty->legacy_mutex, TTY_LOCK_SLAVE); } |