On Thu, Aug 02, 2007 at 04:38:06PM +0200, Thomas Renninger wrote:
> On Thu, 2007-08-02 at 15:48 +0200, Adrian Bunk wrote:
> > On Thu, Aug 02, 2007 at 02:28:06AM +0200, Gabriel C wrote:
> > > Andrew Morton wrote:
> > > > On Wed, 1 Aug 2007 16:31:46 -0700
> > > > "Miles Lane" <[email protected]> wrote:
> > > >
> > > >> LD .tmp_vmlinux1
> > > >> drivers/built-in.o: In function `__cpufreq_governor':
> > > >> cpufreq.c:(.text+0xaf178): undefined reference to `cpufreq_gov_performance'
> > > >> cpufreq.c:(.text+0xaf18a): undefined reference to `cpufreq_gov_performance'
> > > >> make: *** [.tmp_vmlinux1] Error 1
> > > >
> > > > One for Thomas, I expect.
> > >
> > > Is this patch :
> > >
> > > cpufreq-allow-ondemand-and-conservative-cpufreq-governors-to-be-used-as-default.patch
> > >
> > > Reverting it here fixes the error.
> >
> > Possible fix below.
> Or this one.
> Advantage: You can still have cpufreq core without the performance
> governor built.
> Disadvantage: The logic whether transition latency checks are
> needed/done is moved to Kconfig.
> Means, if you write a governor that has transition
> latency values above 0, you must let it depend on
> the performance governor in Kconfig.
>
> Hope I got all .config possibilities with that one now.
> Attached is also a replacement patch for this one:
> cpufreq-allow-ondemand-and-conservative-cpufreq-governors-to-be-used-as-default.patch
>
>
> CPUfreq: Only check for transition latency on problematic governors
>
> Signed-off-by: Thomas Renninger <[email protected]>
> --
>
> --- linux-2.6.23-rc1-mm2/include/linux/cpufreq.h 2007-08-02 16:01:36.000000000 +0200
> +++ linux-2.6.23-rc1-mm2_fixed/include/linux/cpufreq.h 2007-08-02 15:21:28.000000000 +0200
> @@ -299,8 +299,10 @@ static inline unsigned int cpufreq_get(u
> Performance governor is fallback governor if any other gov failed to
> auto load due latency restrictions
> */
> +#ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE
> extern struct cpufreq_governor cpufreq_gov_performance;
> #define CPUFREQ_PERFORMANCE_GOVERNOR (&cpufreq_gov_performance)
> +#endif
> #ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE
> #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_performance)
> #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE)
> --- linux-2.6.23-rc1-mm2/drivers/cpufreq/cpufreq.c 2007-08-02 16:01:35.000000000 +0200
> +++ linux-2.6.23-rc1-mm2_fixed/drivers/cpufreq/cpufreq.c 2007-08-02 16:23:09.000000000 +0200
> @@ -1484,17 +1484,30 @@ static int __cpufreq_governor(struct cpu
> unsigned int event)
> {
> int ret;
> +
> + /* Only must be defined when default governor is known to have latency
> + restrictions, like e.g. conservative or ondemand.
> + That this is the case is already ensured in Kconfig
> + */
> +#ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE
> struct cpufreq_governor *gov = CPUFREQ_PERFORMANCE_GOVERNOR;
> +#else
> + struct cpufreq_governor *gov = NULL;
> +#endif
>...
Looks good, but you could remove CPUFREQ_PERFORMANCE_GOVERNOR and
directly use cpufreq_gov_performance.
cu
Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed
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