[PATCH 0/6] ldsem patchset, reordered and rebased

From: Peter Hurley
Date: Sat Jun 15 2013 - 07:05:44 EST

On 06/03/2013 03:24 PM, Greg Kroah-Hartman wrote:> On Mon, May 20, 2013 at 07:38:57PM -0400, Peter Hurley wrote:
>> On 05/20/2013 07:06 PM, Greg Kroah-Hartman wrote:
>>> On Mon, May 20, 2013 at 05:44:00PM -0400, Peter Hurley wrote:
>>>> On 05/20/2013 03:34 PM, Greg Kroah-Hartman wrote:
>>>>> On Tue, Apr 16, 2013 at 06:15:51AM -0400, Peter Hurley wrote:
>>>>>> Just as the tty pair must be locked in a stable sequence
>>>>>> (ie, independent of which is consider the 'other' tty), so must
>>>>>> the ldisc pair be locked in a stable sequence as well.
>>>>>> Signed-off-by: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
>>>>>> ---
>>>>>> drivers/tty/tty_ldisc.c | 87 +++++++++++++++++++++++++++++++++++++++++++++++++
>>>>>> 1 file changed, 87 insertions(+)
>>>>> This patch breaks the build :(
>>>> Sorry about that.
>>>>> I've taken the first one, care to mush this one with the 7/7 patch, so
>>>>> there are no build breaks, and resend the 5 resulting patches so I can
>>>>> apply these?
>>>> Maybe it would be better to reorder 7/7 to be 1/6, if that's ok?
>>>> More work for me but the history will be cleaner.
>>> Sure, that works for me as well, care to just resend them? Or, I can
>>> dig them out of my archive if needed.
>> I'll resend them because the rebase will require some re-editing.
> Did you ever resend these? If so, I didn't see them :(


Sorry for the delay here. In addition to the re-editing required,
I merged in a couple of fixes and these needed re-testing.

These apply cleanly to tty-next.

Changes from previous 7-patch series:
1. In tty_ldisc_ref(), snapshot tty->ldisc holding ldsem.
The conditions for this to be a fix cannot actually occur but
this is better anyway.
2. In tty_set_ldisc(), the new ldisc needs to be released if
tty_ldisc_lock_pair_timeout() fails.

Peter Hurley

Peter Hurley (6):
tty: Fix tty_ldisc_lock name collision
tty: Add lock/unlock ldisc pair functions
tty: Replace ldisc locking with ldisc_sem
tty: Clarify ldisc variable
tty: Fix hangup race with TIOCSETD ioctl
tty: Clarify multiple-references comment in TIOCSETD ioctl

drivers/tty/tty_buffer.c | 2 +-
drivers/tty/tty_io.c | 11 +-
drivers/tty/tty_ldisc.c | 450 ++++++++++++++++------------------------------
include/linux/tty.h | 4 +-
include/linux/tty_ldisc.h | 3 +-
5 files changed, 158 insertions(+), 312 deletions(-)


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