linux-kernel - Re: [PATCH v5 0/8] Introduce new cpufreq helper macros

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Date:	Tue, 6 May 2014 17:24:46 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Stratos Karafotis <stratosk@...aphore.gr>
Cc:	Viresh Kumar <viresh.kumar@...aro.org>,
	Jesper Nilsson <jesper.nilsson@...s.com>,
	Hans-Christian Egtvedt <egtvedt@...fundet.no>,
	Dirk Brandewie <dirk.j.brandewie@...el.com>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"cpufreq@...r.kernel.org" <cpufreq@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Randy Dunlap <rdunlap@...radead.org>,
	"David S. Miller" <davem@...emloft.net>,
	Linus Walleij <linus.walleij@...aro.org>,
	Simon Horman <horms@...ge.net.au>,
	Sekhar Nori <nsekhar@...com>, Samuel Ortiz <samuel@...tiz.org>,
	Linux-sh list <linux-sh@...r.kernel.org>
Subject: Re: [PATCH v5 0/8] Introduce new cpufreq helper macros

Hi Stratos,

On Wed, Apr 30, 2014 at 12:26 AM, Rafael J. Wysocki <rjw@...ysocki.net> wrote:
> On Tuesday, April 29, 2014 07:05:17 PM Stratos Karafotis wrote:
>> On 29/04/2014 07:17 πμ, Viresh Kumar wrote:
>> > On 26 April 2014 01:45, Stratos Karafotis <stratosk@...aphore.gr> wrote:
>> >> This patch set introduces two freq_table helper macros which
>> >> can be used for iteration over cpufreq_frequency_table and
>> >> makes the necessary changes to cpufreq core and drivers that
>> >> use such an iteration procedure.
>> >>
>> >> The motivation was a usage of common procedure to iterate over
>> >> cpufreq_frequency_table across all drivers and cpufreq core.
>> >>
>> >> This was tested on a x86_64 platform.
>> >> Most files compiled successfully but unfortunately I was not
>> >> able to compile sh_sir.c pasemi_cpufreq.c and ppc_cbe_cpufreq.c
>> >> due to lack of cross compiler.
>> >>
>> >> Changelog
>> >>
>> >> v4 -> v5
>> >>         - Fix warnings in printk format specifier for 32 bit
>> >>           architectures in freq_table.c, longhaul, pasemi, ppc_cbe
>> >
>> > Doesn't look much has changed and so it stays as is:
>> >
>> > Acked-by: Viresh Kumar <viresh.kumar@...aro.org>
>> >
>>
>> Thank you very much!
>
> I've applied the series to my bleeding-edge branch, will move it to linux-next
> after build testing later this week.

This breaks if CONFIG_CPU_FREQ=n, e.g. ARM/shmobile/koelsch/
non-multiplatform:

drivers/built-in.o: In function `clk_round_parent':
clkdev.c:(.text+0xcf168): undefined reference to `cpufreq_next_valid'
drivers/built-in.o: In function `clk_rate_table_find':
clkdev.c:(.text+0xcf820): undefined reference to `cpufreq_next_valid'
make[3]: *** [vmlinux] Error 1

drivers/sh/clk/core.c (pre-CCF shmobile clock core) calls
cpufreq_for_each_valid_entry():

#define cpufreq_for_each_valid_entry(pos, table)        \
        for (pos = table; cpufreq_next_valid(&pos); pos++)

but cpufreq_next_valid() in drivers/cpufreq/cpufreq.c is not
compiled in.

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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