linux-kernel - Re: [PATCH 2/5] drivers/video/gbefb.c: use devm

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Date:	Thu, 20 Sep 2012 21:58:46 +0000
From:	Florian Tobias Schandinat <FlorianSchandinat@....de>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Damien Cassou <damien.cassou@...l.fr>
CC:	kernel-janitors@...r.kernel.org, linux-fbdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] drivers/video/gbefb.c: use devm_ functions

Hi Geert,

On 09/13/2012 07:06 PM, Geert Uytterhoeven wrote:
> On Thu, Aug 23, 2012 at 10:37 PM, Florian Tobias Schandinat
> <FlorianSchandinat@....de> wrote:
>> On 07/31/2012 04:39 PM, Damien Cassou wrote:
>>> From: Damien Cassou <damien.cassou@...l.fr>
>>>
>>> The various devm_ functions allocate memory that is released when a driver
>>> detaches.  This patch uses these functions for data that is allocated in
>>> the probe function of a platform device and is only freed in the remove
>>> function.
>>>
>>> Signed-off-by: Damien Cassou <damien.cassou@...l.fr>
>>
>> Applied.
> 
>>> diff --git a/drivers/video/gbefb.c b/drivers/video/gbefb.c
>>> index 7e7b7a9..9b79d38 100644
>>> --- a/drivers/video/gbefb.c
>>> +++ b/drivers/video/gbefb.c
>>> @@ -1156,7 +1156,8 @@ static int __devinit gbefb_probe(struct platform_device *p_dev)
>>>               goto out_release_framebuffer;
>>>       }
>>>
>>> -     gbe = (struct sgi_gbe *) ioremap(GBE_BASE, sizeof(struct sgi_gbe));
>>> +     gbe = (struct sgi_gbe *) devm_ioremap(&p_dev->dev, GBE_BASE,
>>> +                                           sizeof(struct sgi_gbe));
> 
> drivers/video/gbefb.c:1159:16: error: implicit declaration of function
> 'devm_ioremap' [-Werror=implicit-function-declaration]
> drivers/video/gbefb.c:1179:3: error: implicit declaration of function
> 'devm_ioremap_nocache' [-Werror=implicit-function-declaration]

Thanks for pointing this out. I guess the solution is to replace the
include asm/io.h by linux/io.h as Axel Lin did for some other driver in
this patch series.

@Damien:
Can you please do a patch as I suggested and preferable also recheck the
other drivers you touched?
And it probably would have been a good idea to mention that you didn't
compile-test it. I do some compile tests before pushing my branch but
that is far from complete due to arch and platform specific drivers.


Best regards,

Florian Tobias Schandinat

> 
> http://kisskb.ellerman.id.au/kisskb/buildresult/7187731/
> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
> 
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds
> 

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