On 2015/1/16 5:30, Thomas Gleixner wrote:
> On Thu, 8 Jan 2015, Jiang Liu wrote:
>
>> Introduce helper function acpi_dev_filter_resource_type(), which may
>> be used by acpi_dev_get_resources() to filer out resource based on
>> resource type.
>>
>> Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
>> ---
>> drivers/acpi/resource.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++
>> include/linux/acpi.h | 1 +
>> 2 files changed, 55 insertions(+)
>>
>> diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
>> index 54204ac94f8e..8ea7c26d6915 100644
>> --- a/drivers/acpi/resource.c
>> +++ b/drivers/acpi/resource.c
>> @@ -570,3 +570,57 @@ int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
>> return c.count;
>> }
>> EXPORT_SYMBOL_GPL(acpi_dev_get_resources);
>> +
>> +/**
>> + * acpi_dev_filter_resource_type - Filter ACPI resource according to resource
>> + * types
>> + * @ares: Input ACPI resource object.
>> + * @arg: Valid resource types of IORESOURCE_XXX
>> + *
>> + * This is a hepler function to support acpi_dev_get_resources(), which filters
>> + * ACPI resource objects according to resource types.
>> + */
>> +int acpi_dev_filter_resource_type(struct acpi_resource *ares, void *arg)
>
> Why is the filter a void pointer instead of an simple unsigned long?
> That does not make any sense as you convert it to unsigned long right away:
>
>> +{
>> + unsigned long type = 0, types = (unsigned long)arg;
>
> So this should be:
>
> int acpi_dev_filter_resource_type(struct acpi_resource *ares, unsigned long type_mask)
>
> or something like that.
Hi Thomas,
I used void * instead of unsigned long for type_mask so
acpi_dev_filter_resource_type() could directly used by
acpi_dev_get_resources(). Otherwise we need to use something like
acpi_dev_get_resources(..., (void *)acpi_dev_filter_resource_type, ...).
I will find a way to solve this:)
Regards!
Gerry
>
> Thanks,
>
> tglx
>
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