linux-kernel - Re: [PATCH RT 2/4] acpi/rt: Convert acpi_gbl_hardware lock back to a raw_spinlock

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Message-ID: <51BB398D.6040403@linutronix.de>
Date:	Fri, 14 Jun 2013 17:41:01 +0200
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	linux-kernel@...r.kernel.org,
	linux-rt-users <linux-rt-users@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Carsten Emde <C.Emde@...dl.org>,
	John Kacur <jkacur@...hat.com>,
	Clark Williams <clark@...hat.com>, stable-rt@...r.kernel.org
Subject: Re: [PATCH RT 2/4] acpi/rt: Convert acpi_gbl_hardware lock back to
 a raw_spinlock_t

On 06/14/2013 05:16 PM, Steven Rostedt wrote:
> Hi Sebastian,

Hi Steven,

> 
> Any reason that this patch was dropped for 3.8? We hit this exact same
> bug recently with a 3.8-rt kernel.

No particular reason. Going through my log of the queue I have to say
that it was never in the queue starting v3.8.

The only ACPI patches that were dropped are:

 # ACPI
 # Dropped those two as they cause a scheduling in atomic failure and
 # we have no clue why we made those locks raw in the first place.
 # acpi-make-gbl-hardware-lock-raw.patch
 # acpi-make-ec-lock-raw-as-well.patch

 # This one is just a follow up to the raw spin locks
 # Simple raw spinlock based waitqueue
 # wait-simple-version.patch
 # acpi-gpe-use-wait-simple.patch

but that wasn't me.

In that case I try to bring it back in.

> -- Steve

Sebastian
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