diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/tty.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h index 55964b9490dd..fe5623c9af71 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -25,6 +25,9 @@ * * legacy_mutex - Nested tty locks are necessary for releasing pty pairs. * The stable lock order is master pty first, then slave pty. + * termios_rwsem - The stable lock order is tty_buffer lock->termios_rwsem. + * Subclassing this lock enables the slave pty to hold its + * termios_rwsem when claiming the master tty_buffer lock. * tty_buffer lock - slave ptys can claim nested buffer lock when handling * signal chars. The stable lock order is slave pty, then * master. |