From: Arnd Bergmann <arnd@arndb.de>
To: Alan Cox <alan@linux.intel.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH 04/14] vc: Locking clean up
Date: Fri, 30 Apr 2010 22:30:22 +0200 [thread overview]
Message-ID: <201004302230.22358.arnd@arndb.de> (raw)
In-Reply-To: <20100401160451.8882.30559.stgit@localhost.localdomain>
On Thursday 01 April 2010 18:04:59 Alan Cox wrote:
> @@ -282,7 +282,12 @@ static inline unsigned short *screenpos(struct vc_data *vc, int offset, int view
>
> static inline void scrolldelta(int lines)
> {
> + lock_kernel();
> + /* FIXME */
> + /* scrolldelta needs some kind of consistency lock, but the BKL was
> + and still is not protecting versus the scheduled back end */
> scrollback_delta += lines;
> + unlock_kernel();
> schedule_console_callback();
> }
>
This one triggered a might_sleep() warning in _lock_kernel(), because
it's called from the keyboard interrupt.
Arnd
next prev parent reply other threads:[~2010-04-30 20:30 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-01 16:04 [RFC PATCH 00/14] Some BKL killing in the serial drivers Alan Cox
2010-04-01 16:04 ` [PATCH 01/14] tty: serial - fix tty referencing in set_ldisc Alan Cox
2010-04-01 16:04 ` [PATCH 02/14] tty: serial - fix tty back references in termios Alan Cox
2010-04-01 16:04 ` [PATCH 03/14] tty: serial - fix various misuses/mishandlings of port->tty Alan Cox
2010-04-01 16:04 ` [PATCH 04/14] vc: Locking clean up Alan Cox
2010-04-30 20:30 ` Arnd Bergmann [this message]
2010-04-01 16:05 ` [PATCH 05/14] stallion: prune lock_kernel calls Alan Cox
2010-04-29 21:29 ` Arnd Bergmann
2010-04-30 19:32 ` Alan Cox
2010-04-01 16:05 ` [PATCH 06/14] istallion: use bit ops for the board flags Alan Cox
2010-04-01 16:05 ` [PATCH 07/14] riscom8: kill use of lock_kernel Alan Cox
2010-04-01 16:05 ` [PATCH 08/14] isicom: kill off the BKL Alan Cox
2010-04-01 16:06 ` [PATCH 09/14] rocket: kill BKL Alan Cox
2010-04-01 16:06 ` [PATCH 10/14] synclink: kill the big kernel lock Alan Cox
2010-04-01 16:06 ` [PATCH 11/14] cyclades: Kill off BKL usage Alan Cox
2010-04-01 16:06 ` [PATCH 12/14] epca: Kill the big kernel lock Alan Cox
2010-04-01 16:07 ` [PATCH 13/14] specialix; Kill the BKL Alan Cox
2010-04-01 16:07 ` [PATCH 14/14] synclink: reworking locking a bit Alan Cox
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