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From: Chris Wright <chrisw@sous-sol.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@osdl.org>, Greg KH <greg@kroah.com>,
	Dmitry Torokhov <dmitry.torokhov@gmail.com>,
	Andi Kleen <ak@suse.de>, Ralf Baechle <ralf@linux-mips.org>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Ingo Molnar <mingo@elte.hu>, Stable Team <stable@kernel.org>,
	Richard Henderson <rth@twiddle.net>
Subject: Re: [stable] [PATCH] INPUT: Sanitize PIT locking in pcspkr
Date: Mon, 11 Jun 2007 17:27:47 -0700	[thread overview]
Message-ID: <20070612002747.GJ3723@sequoia.sous-sol.org> (raw)
In-Reply-To: <1179408962.3764.72.camel@chaos>

* Thomas Gleixner (tglx@linutronix.de) wrote:
> The PC-speaker code has a quite creative method to serialize access to
> the PIT: It uses a local lock.
> 
> On i386 and x86_64 the access to the PIT is serialized by a lock in the
> architecture code. The separate locking in the PC-speaker code ignores
> the global lock and creates a nasty race between the PC-speaker and the
> PIT clock source / events code on SMP machines.
> 
> Use the global i8253_lock instead of the local i8253_beep_lock, when
> compiled for i386/x86_64.

Seems this one got lost?

thanks,
-chris

  parent reply	other threads:[~2007-06-12  0:29 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-05-17 13:36 Thomas Gleixner
2007-05-17 14:15 ` Dmitry Torokhov
2007-05-17 14:35   ` Thomas Gleixner
2007-05-17 14:36     ` Dmitry Torokhov
2007-05-17 14:49       ` Thomas Gleixner
2007-05-18  4:27         ` Andi Kleen
2007-05-18  6:26         ` Dmitry Torokhov
2007-06-12  0:27 ` Chris Wright [this message]
2007-06-12  5:50   ` [stable] " Dmitry Torokhov

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