Re: [PATCH 1/3] platform: add common resource requesting and mapping helper

[Barry Song]

Linus,

2012/2/1 Linus Walleij <linus.walleij@xxxxxxxxxx>:
> On Tue, Jan 31, 2012 at 11:00 AM, Barry Song <Barry.Song@xxxxxxx> wrote:
>
>> From: Barry Song <Baohua.Song@xxxxxxx>
>>
>> this patch helps to move the common pattern from
>
> Good idea!
>
>> @@ -44,6 +44,7 @@ extern struct device platform_bus;
>>
>> Âextern void arch_setup_pdev_archdata(struct platform_device *);
>> Âextern struct resource *platform_get_resource(struct platform_device *, unsigned int, unsigned int);
>> +extern void __iomem *platform_devm_request_and_ioremap(struct platform_device *, unsigned int);
>
> But don't you want a reverse call for the module remove() function?
>
> Like:
>
> extern void __iomem *platform_devm_iounmap_and_free(struct
> platform_device *, unsigned int);

that point is we have the garbage collection mechanism by calling
devm_ function families. everything is undone on driver detach.
so we will not have the free and unmap things.
>
> ?
>
> Yours,
> Linus Walleij

-barry
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