linux-kernel - Re: [PATCH] cpufreq: suspend/resume governors with PM notifiers

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Message-ID: <CAKohpo=UjSqzE+Jg0s3taykHu4VinNUvLLhRm6pUXiyUc5F-3w@mail.gmail.com>
Date:	Mon, 18 Nov 2013 16:31:58 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Lan Tianyu <tianyu.lan@...el.com>
Cc:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Lists linaro-kernel <linaro-kernel@...ts.linaro.org>,
	Patch Tracking <patches@...aro.org>,
	"cpufreq@...r.kernel.org" <cpufreq@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Nishanth Menon <nm@...com>, jinchoi@...adcom.com,
	Sebastian Capella <sebastian.capella@...aro.org>,
	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
Subject: Re: [PATCH] cpufreq: suspend/resume governors with PM notifiers

On 18 November 2013 16:27, Lan Tianyu <tianyu.lan@...el.com> wrote:
> How about introducing a resume/suspend callback pointer or list(if there
> are several places that need to deal with cpu resume/suspend) in the
> struct cpu and populate it in the cpufreq_add_dev()?
>
> The suspend/resume() of cpu_subsys needs to check the callback pointer
> and run it if available.

That's almost a new infrastructure then and looks more hackish :)
Apart from that even cpufreq would be a bit hacky as we don't really need
per-cpu callbacks..
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