From: Arnd Bergmann <arnd@arndb.de>
To: linux-kernel@vger.kernel.org
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>, Greg KH <gregkh@suse.de>,
Frederic Weisbecker <fweisbec@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>,
John Kacur <jkacur@redhat.com>, Al Viro <viro@zeniv.linux.org.uk>,
Ingo Molnar <mingo@elte.hu>
Subject: Re: [PATCH 13/13] tty: turn ldisc_mutex into a regular mutex
Date: Wed, 5 May 2010 11:18:51 +0200 [thread overview]
Message-ID: <201005051118.51479.arnd@arndb.de> (raw)
In-Reply-To: <1273012433-6125-14-git-send-email-arnd@arndb.de>
On Wednesday 05 May 2010, Arnd Bergmann wrote:
> This fixes the lock order of the BTM and
> ldisc_mutex so that we never take the BTM
> while holding ldisc_mutex, which means
> we no longer have to use mutex_lock_tty
> when getting ldisc_mutex.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Ignore this one, I just realized that we're releasing
and reacquiring the BTM in tty_ldisc_halt,
tty_set_termios_ldisc and possibly others.
This patch needs more work to make that possible.
Arnd
next prev parent reply other threads:[~2010-05-05 9:18 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-04 22:33 [PATCH v2 00/13] BKL conversion in tty layer Arnd Bergmann
2010-05-04 22:33 ` [PATCH 01/13] tty: replace BKL with a new tty_lock Arnd Bergmann
2010-05-04 22:33 ` [PATCH 02/13] tty: make atomic_write_lock release tty_lock Arnd Bergmann
2010-05-05 10:57 ` Alan Cox
2010-05-04 22:33 ` [PATCH 03/13] tty: make tty_port->mutex nest under tty_lock Arnd Bergmann
2010-05-04 22:33 ` [PATCH 04/13] tty: make termios mutex " Arnd Bergmann
2010-05-05 16:11 ` Arnd Bergmann
2010-05-04 22:33 ` [PATCH 05/13] tty: make ldisc_mutex " Arnd Bergmann
2010-05-04 22:33 ` [PATCH 06/13] tty: never hold BTM while getting tty_mutex Arnd Bergmann
2010-05-04 22:33 ` [PATCH 07/13] tty: give up BTM in acquire_console_sem Arnd Bergmann
2010-05-04 22:33 ` [PATCH 08/13] tty: release tty lock when blocking Arnd Bergmann
2010-05-04 22:33 ` [PATCH 09/13] tty: implement BTM as mutex instead of BKL Arnd Bergmann
2010-05-04 22:33 ` [PATCH 10/13] tty: untangle locking of wait_until_sent Arnd Bergmann
2010-05-05 19:59 ` Alan Cox
2010-05-05 21:31 ` Arnd Bergmann
2010-05-05 22:51 ` Greg KH
2010-05-05 23:52 ` Alan Cox
2010-05-24 19:00 ` Pavel Machek
2010-05-24 20:27 ` Alan Cox
2010-05-04 22:33 ` [PATCH 11/13] tty: remove tty_lock_nested Arnd Bergmann
2010-05-04 22:33 ` [PATCH 12/13] tty: remove release_tty_lock/reacquire_tty_lock Arnd Bergmann
2010-05-04 22:33 ` [PATCH 13/13] tty: turn ldisc_mutex into a regular mutex Arnd Bergmann
2010-05-05 9:18 ` Arnd Bergmann [this message]
2010-05-05 10:52 ` [PATCH v2 00/13] BKL conversion in tty layer Alan Cox
2010-05-05 12:24 ` Arnd Bergmann
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