From: Jiri Slaby <jslaby@suse.cz>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org,
Jiri Slaby <jirislaby@gmail.com>
Subject: Re: [PATCH 2/6] vt: push down the tty lock so we can see what is left to tackle
Date: Thu, 01 Mar 2012 21:31:11 +0100 [thread overview]
Message-ID: <4F4FDC8F.2010300@suse.cz> (raw)
In-Reply-To: <20120301195005.11322.78572.stgit@bob.linux.org.uk>
On 03/01/2012 08:50 PM, Alan Cox wrote:
> --- a/drivers/tty/vt/vt_ioctl.c
> +++ b/drivers/tty/vt/vt_ioctl.c
> @@ -281,7 +281,6 @@ int vt_ioctl(struct tty_struct *tty,
>
> console = vc->vc_num;
>
> - tty_lock();
Note that this breaks bisection. Further in vt_ioctl, there is a call to
vt_event_wait_ioctl which calls vt_event_wait and that calls
wait_event_interruptible_tty which unlocks BTM.
You change wait_event_interruptible_tty to wait_event_interruptible even
in 4/6.
The VT_WAITEVENT case should have tty_lock until 4/6 (and not longer).
thanks,
--
js
suse labs
next prev parent reply other threads:[~2012-03-01 20:31 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-01 19:49 [PATCH 0/6] Remove tty_lock from the console drivers Alan Cox
2012-03-01 19:49 ` [PATCH 1/6] vt: sort out locking for font handling Alan Cox
2012-03-01 19:50 ` [PATCH 2/6] vt: push down the tty lock so we can see what is left to tackle Alan Cox
2012-03-01 19:50 ` Alan Cox
2012-03-01 20:31 ` Jiri Slaby [this message]
2012-03-01 21:51 ` Arnd Bergmann
2012-03-01 19:51 ` [PATCH 3/6] vt: push down tioclinux cases Alan Cox
2012-03-01 19:51 ` [PATCH 4/6] vt: waitevent is self locked so drop the tty_lock Alan Cox
2012-03-01 19:52 ` [PATCH 5/6] vt: tackle the main part of the selection logic Alan Cox
2012-03-01 19:52 ` [PATCH 6/6] vt: push the tty_lock down into the map handling Alan Cox
2012-03-01 22:10 ` [PATCH 0/6] Remove tty_lock from the console drivers Arnd Bergmann
-- strict thread matches above, loose matches on Subject: below --
2012-03-02 14:58 [PATCH 0/6] Series short description Alan Cox
2012-03-02 14:59 ` [PATCH 2/6] vt: push down the tty lock so we can see what is left to tackle Alan Cox
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