linux-kernel - Re: [PATCHv2 1/4] clockevents: Add generic timer broadcast receiver

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Message-ID: <20130115120012.GA23333@e106331-lin.cambridge.arm.com>
Date:	Tue, 15 Jan 2013 12:00:12 +0000
From:	Mark Rutland <mark.rutland@....com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"nico@...aro.org" <nico@...aro.org>,
	Will Deacon <Will.Deacon@....com>,
	Marc Zyngier <Marc.Zyngier@....com>,
	"john.stultz@...aro.org" <john.stultz@...aro.org>
Subject: Re: [PATCHv2 1/4] clockevents: Add generic timer broadcast receiver

On Tue, Jan 15, 2013 at 11:24:53AM +0000, Thomas Gleixner wrote:
> On Mon, 14 Jan 2013, Mark Rutland wrote:
> > On Mon, Jan 14, 2013 at 02:17:26PM +0000, Thomas Gleixner wrote:
> > > > I thought this previously also [1], but I couldn't find any path such that a
> > > > tick_cpu_device would have an evtdev without an event_handler. We always set the
> > > > handler before setting evtdev, and alway wipe evtdev before wiping the handler.
> > > > 
> > > > Have I missed something?
> > > 
> > > That's an x86 specific issue. Though we could try and make that
> > > functionality completely generic.
> > 
> > Just to check: is the evt->event_handler check necessary?
> 
> For x86 yes. See the comment.

Ah, sorry. I misunderstood on my initial reading.

I've posted a version with the evt->event_handler check restored, and the
tick_receive_broadcast stub removed when !CONFIG_GENERIC_CLOCKEVENTS_BROADCAST:

https://lkml.org/lkml/2013/1/14/276

The generic clockevents patches (based on v3.8-rc3) can also be found at
git://linux-arm.org/linux-mr.git tags/timer-broadcast-v3-core

> Thanks,
> 
> 	tglx
> 

Thanks,
Mark.

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