From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1754648AbbGFT5M (ORCPT <rfc822;w@1wt.eu>);
	Mon, 6 Jul 2015 15:57:12 -0400
Received: from www.linutronix.de ([62.245.132.108]:57243 "EHLO
	Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1751181AbbGFT5I (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Mon, 6 Jul 2015 15:57:08 -0400
Date: Mon, 6 Jul 2015 21:56:59 +0200 (CEST)
From: Thomas Gleixner <tglx@linutronix.de>
To: Sudeep Holla <sudeep.holla@arm.com>
cc: LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Preeti U Murthy <preeti@linux.vnet.ibm.com>,
        Suzuki Poulose <Suzuki.Poulose@arm.com>,
        Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>,
        Catalin Marinas <Catalin.Marinas@arm.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Subject: Re: [patch 1/2] tick/broadcast: Prevent deep idle states if no
 broadcast device available
In-Reply-To: <559AC1A5.901@arm.com>
Message-ID: <alpine.DEB.2.11.1507062156040.3916@nanos>
References: <20150705205032.103910828@linutronix.de> <20150705205221.724282507@linutronix.de> <559A9A2B.2030705@arm.com> <alpine.DEB.2.11.1507061712590.3916@nanos> <559AA256.5040305@arm.com> <alpine.DEB.2.11.1507061750170.3916@nanos> <559AAC73.6010105@arm.com>
 <alpine.DEB.2.11.1507061838160.3916@nanos> <559AC1A5.901@arm.com>
User-Agent: Alpine 2.11 (DEB 23 2013-08-11)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
X-Linutronix-Spam-Score: -1.0
X-Linutronix-Spam-Level: -
X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required,  ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Mon, 6 Jul 2015, Sudeep Holla wrote:
> This triggered the below crash on boot, looks like it's accessing
> hrtimer->function which is null in periodic mode IIUC
> 
> Regards,
> Sudeep

Gah. I have no idea how that gets queued. /me goes off to tweak x86 to
emulate that crap.
 
> --->8
> 
> Bad mode in Synchronous Abort handler detected, code 0x86000005 -- IABT
> (current EL)
> CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.2.0-rc1 #577
> Hardware name: ARM Juno development board (r0) (DT)
> task: ffffffc976900000 ti: ffffffc9768fc000 task.ti: ffffffc9768fc000
> PC is at 0x0
> LR is at bc_handler+0x20/0x58
> pc : [<0000000000000000>] lr : [<ffffffc00010f4a4>] pstate: a00001c5
> sp : ffffffc9768ffbd0
> 
> Call trace:
> [<          (null)>]           (null)
> [<ffffffc000101e88>] __hrtimer_run_queues+0xe0/0x150
> [<ffffffc0001028b4>] hrtimer_run_queues+0xb8/0xe8
> [<ffffffc000101714>] update_process_times+0x28/0x6c
> [<ffffffc00010d978>] tick_periodic+0x3c/0xb8
> [<ffffffc00010da1c>] tick_handle_periodic+0x28/0x94
> [<ffffffc0004d61d4>] arch_timer_handler_phys+0x28/0x38
> [<ffffffc0000f5964>] handle_percpu_devid_irq+0x74/0x9c
> [<ffffffc0000f1668>] generic_handle_irq+0x30/0x4c
> [<ffffffc0000f1984>] __handle_domain_irq+0x5c/0xac
> [<ffffffc0000824a8>] gic_handle_irq+0x30/0x80
>