From mboxrd@z Thu Jan  1 00:00:00 1970
From: gregkh@linuxfoundation.org (Greg Kroah-Hartman)
Date: Thu, 5 Jun 2014 11:05:24 -0700
Subject: [PATCH 3.10 005/103] irqchip: Gic: Support forced affinity setting
In-Reply-To: <20140605160500.GD31564@leverpostej>
References: <20140604232546.704156131@linuxfoundation.org>
 <20140604232547.006861681@linuxfoundation.org>
 <20140605160500.GD31564@leverpostej>
Message-ID: <20140605180524.GC4121@kroah.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Thu, Jun 05, 2014 at 05:05:00PM +0100, Mark Rutland wrote:
> Hi Greg,
> 
> On Thu, Jun 05, 2014 at 12:24:28AM +0100, Greg Kroah-Hartman wrote:
> > 3.10-stable review patch.  If anyone has any objections, please let me know.
> > 
> > ------------------
> > 
> > From: Thomas Gleixner <tglx@linutronix.de>
> > 
> > commit ffde1de64012c406dfdda8690918248b472f24e4 upstream.
> > 
> > To support the affinity setting of per cpu timers in the early startup
> > of a not yet online cpu, implement the force logic, which disables the
> > cpu online check.
> > 
> > Tagged for stable to allow a simple fix of the affected SoC clock
> > event drivers.
> 
> This patch alone has the possiblity of breaking CPU hotplug on arm and
> arm64 (specifically it breaks hot unplugging CPU0 where interrupts may
> be left targetting the offline CPU).
> 
> For arm64 [1] that's fixed by commit 601c942176d8 (arm64: use
> cpu_online_mask when using forced irq_set_affinity).

Thanks, I'll apply that to the 3.14-stable tree, but, it doesn't seem
relevant at all for 3.10-stable as arch/arm64/kernel/irq.c doesn't do
anything with cpumask or set_affinity.  If it's relevant for 3.10,
please provide a backported version.

> Unfortunately there is not an equivalent fix for arm - Russell objected
> to the approach [2,3,4], and that's not yet settled.

Ok, be sure to cc: stable on the patch when it goes into the tree and
I'll pick it up then.

thanks,

greg k-h