linux-kernel - Re: [PATCH V2 5/6] cpufreq: Add compatibility hack to powernow-k8

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Date:	Sat, 18 Jun 2011 13:28:34 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Matthew Garrett <mjg@...hat.com>
Cc:	linux-kernel@...r.kernel.org, borislav.petkov@....com,
	davej@...hat.com, mark.langsdorf@....com, cpufreq@...r.kernel.org,
	andreas.herrmann3@....com
Subject: Re: [PATCH V2 5/6] cpufreq: Add compatibility hack to powernow-k8

On Fri, Jun 17, 2011 at 03:50:56PM -0400, Matthew Garrett wrote:
> cpufreq modules are often loaded from init scripts that assume that all
> recent AMD systems will use powernow-k8, so we should ensure that loading
> it triggers a load of acpi-cpufreq if the latter is built as a module.
> This avoids the problem of users ending up without any cpufreq support
> after the transition.
> 
> Signed-off-by: Matthew Garrett <mjg@...hat.com>
> ---
>  drivers/cpufreq/powernow-k8.c |    6 +++++-
>  1 files changed, 5 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c
> index 83479b6..8591ec8 100644
> --- a/drivers/cpufreq/powernow-k8.c
> +++ b/drivers/cpufreq/powernow-k8.c
> @@ -1545,8 +1545,12 @@ static int __cpuinit powernowk8_init(void)
>  			supported_cpus++;
>  	}
>  
> -	if (supported_cpus != num_online_cpus())
> +	if (supported_cpus != num_online_cpus()) {
> +		if (cpu_has(0, X86_FEATURE_HW_PSTATE))

you mean here
		if (boot_cpu_has(X86_FEATURE_HW_PSTATE))

otherwise:

drivers/cpufreq/powernow-k8.c: In function ‘powernowk8_init’:
drivers/cpufreq/powernow-k8.c:1553: error: invalid type argument of ‘->’ (have ‘int’)
drivers/cpufreq/powernow-k8.c:1553: error: invalid type argument of ‘->’ (have ‘int’)
make[2]: *** [drivers/cpufreq/powernow-k8.o] Error 1
make[1]: *** [drivers/cpufreq] Error 2
make: *** [drivers] Error 2
make: *** Waiting for unfinished jobs....


> +			request_module("acpi_cpufreq");
> +
>  		return -ENODEV;
> +	}
>  
>  	printk(KERN_INFO PFX "Found %d %s (%d cpu cores) (" VERSION ")\n",
>  		num_online_nodes(), boot_cpu_data.x86_model_id, supported_cpus);
> -- 
> 1.7.5.2

-- 
Regards/Gruss,
    Boris.
--
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