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Date: Fri, 20 Feb 2015 12:41:36 +0100
From: Ingo Molnar <mingo@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Viresh Kumar <viresh.kumar@linaro.org>,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
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        Ley Foon Tan <lftan@altera.com>, Jonas Bonn <jonas@southpole.se>,
        "David S. Miller" <davem@davemloft.net>, Jeff Dike <jdike@addtoit.com>,
        Guan Xuetao <gxt@mprc.pku.edu.cn>
Subject: Re: [PATCH] clockevents: Add (missing) default case for switch blocks
Message-ID: <20150220114136.GA27483@gmail.com>
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* Peter Zijlstra <peterz@infradead.org> wrote:

> On Fri, Feb 20, 2015 at 10:36:59AM +0100, Ingo Molnar wrote:

> > > But it does mean we need to be able to add values to 
> > > the enum.
> > 
> > So I'm confused: if we are using proper callbacks (like 
> > my example outlined) , why is a 'mode enum' needed at 
> > all?
> 
> Ah, its because the enum is shared between two different 
> use-cases. The one is the clockevent driver for the 
> clock_event_device::set_mode() call, and one is the 
> clockevent core call: clockevent_set_mode().
> 
> The previous patch changed the driver interface, but 
> retained the sharing of the enum across both interfaces.
> 
> Maybe we should break that enum into two; one for devices 
> and one for the core interface and avoid the problem that 
> way.

Yeah, that would do the trick.

Thanks,

	Ingo