linux-kernel - Re: [PATCH] PM: Kconfig: Set PM_RUNTIME if PM

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Date:	Tue, 18 Nov 2014 09:32:17 +0100
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Kevin Hilman <khilman@...nel.org>
Cc:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Linux PM list <linux-pm@...r.kernel.org>,
	linaro-kernel <linaro-kernel@...ts.linaro.org>,
	Grygorii Strashko <grygorii.strashko@...com>,
	Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
	LKML <linux-kernel@...r.kernel.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>
Subject: Re: [PATCH] PM: Kconfig: Set PM_RUNTIME if PM_SLEEP is selected

On Tue, Nov 18, 2014 at 4:52 AM, Kevin Hilman <khilman@...nel.org> wrote:
> "Rafael J. Wysocki" <rjw@...ysocki.net> writes:
>
>> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>>
>> The number of and dependencies between high-level power management
>> Kconfig options make life much harder than necessary.  Several
>> conbinations of them have to be tested and supported, even though
>> some of those combinations are very rarely used in practice (it
>> they are used in practice at all).  Moreover, the fact that we
>> have separate independent Kconfig options for runtime PM and
>> system suspend is a serious obscacle for integration between
>> the two frameworks.
>>
>> To overcome these difficulties, always select PM_RUNTIME if PM_SLEEP
>> is set.  Among other things, this will allow system suspend callbacks
>> provided by bus types and device drivers to rely on the runtime PM
>> framework regardless of the kernel configuration.
>>
>> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>> ---
>>
>> As a follow up.
>>
>> Note that we won't need the patch making genpd select PM_RUNTIME with this,
>> because genpd already depends on PM.
>>
>> Thoughts, comments?
>
> Acked-by: Kevin Hilman <khilman@...aro.org>

This gets rid of

kernel/power/Kconfig:132:error: recursive dependency detected!
kernel/power/Kconfig:132: symbol PM_RUNTIME is selected by PM_GENERIC_DOMAINS
kernel/power/Kconfig:272: symbol PM_GENERIC_DOMAINS is selected by PM_RUNTIME

Tested-by: Geert Uytterhoeven <geert+renesas@...der.be>

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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