linux-kernel - Re: [RFC Patch v1 3/6] acpi_pad: use acpi_evaluate

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Message-ID: <2178847.Vaot4mm02Q@vostro.rjw.lan>
Date:	Tue, 18 Feb 2014 02:07:33 +0100
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Jiang Liu <jiang.liu@...ux.intel.com>
Cc:	"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
	Lv Zheng <lv.zheng@...el.com>, Len Brown <lenb@...nel.org>,
	Tony Luck <tony.luck@...el.com>, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC Patch v1 3/6] acpi_pad: use acpi_evaluate_pad() to replace open-coded version

On Monday, February 17, 2014 01:02:50 PM Jiang Liu wrote:
> Use public function acpi_evaluate_pad() to replace open-coded

I suppose you mean acpi_evaluate_ost()?  And in the other patches
in this series too?

> version of evaluating ACPI _OST method.
> 
> Signed-off-by: Jiang Liu <jiang.liu@...ux.intel.com>
> ---
>  drivers/acpi/acpi_pad.c |   24 +++++-------------------
>  1 file changed, 5 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/acpi/acpi_pad.c b/drivers/acpi/acpi_pad.c
> index 1e3ce76..86b4e11 100644
> --- a/drivers/acpi/acpi_pad.c
> +++ b/drivers/acpi/acpi_pad.c
> @@ -408,28 +408,14 @@ static int acpi_pad_pur(acpi_handle handle)
>  	return num;
>  }
>  
> -/* Notify firmware how many CPUs are idle */
> -static void acpi_pad_ost(acpi_handle handle, int stat,
> -	uint32_t idle_cpus)
> -{
> -	union acpi_object params[3] = {
> -		{.type = ACPI_TYPE_INTEGER,},
> -		{.type = ACPI_TYPE_INTEGER,},
> -		{.type = ACPI_TYPE_BUFFER,},
> -	};
> -	struct acpi_object_list arg_list = {3, params};
> -
> -	params[0].integer.value = ACPI_PROCESSOR_AGGREGATOR_NOTIFY;
> -	params[1].integer.value =  stat;
> -	params[2].buffer.length = 4;
> -	params[2].buffer.pointer = (void *)&idle_cpus;
> -	acpi_evaluate_object(handle, "_OST", &arg_list, NULL);
> -}
> -
>  static void acpi_pad_handle_notify(acpi_handle handle)
>  {
>  	int num_cpus;
>  	uint32_t idle_cpus;
> +	struct acpi_buffer param = {
> +		.length = 4,
> +		.pointer = (void *)&idle_cpus,
> +	};
>  
>  	mutex_lock(&isolated_cpus_lock);
>  	num_cpus = acpi_pad_pur(handle);
> @@ -439,7 +425,7 @@ static void acpi_pad_handle_notify(acpi_handle handle)
>  	}
>  	acpi_pad_idle_cpus(num_cpus);
>  	idle_cpus = acpi_pad_idle_cpus_num();
> -	acpi_pad_ost(handle, 0, idle_cpus);
> +	acpi_evaluate_ost(handle, ACPI_PROCESSOR_AGGREGATOR_NOTIFY, 0, &param);
>  	mutex_unlock(&isolated_cpus_lock);
>  }
>  
> 

-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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